Threema. The Secure Messenger App DownloadThreema GmbH

Threema. The Secure Messenger App Download

Threema is the world’s best-selling secure messenger and keeps your data out of the hands of hackers, corporations, and governments. The service can be used completely anonymously. Threema is open source, allows to make end-to-end encrypted voice and video calls, and offers every feature one would expect from a state-of-the-art instant messenger. With Threema Web, you can also use Threema from your Desktop.

Threema is designed from the ground up to generate as little data on servers as possible. Group memberships and contact lists are managed on your device only, and never stored on our servers. Messages are immediately deleted after they have been delivered. Local files are stored encrypted on your mobile phone or tablet. All this effectively prevents the collection and misuse of your personal information, including metadata. Threema is fully compliant with the European privacy legislation (GDPR).

Threema encrypts ALL your communications END-TO-END including messages, voice and video calls, group chats, media files and even status messages. You can rest assured that only the intended recipient can read your chats, and nobody else – not even us. Threema uses the trusted open source NaCl cryptography library for encryption. The encryption keys are generated and safely stored on users’ devices to prevent backdoor access or copies.

Threema is not only an encrypted and private messenger but also versatile and feature-rich.

• Write text and send voice messages
• Make voice and video calls (requires iPhone 5s / iOS 10 or above)
• Share videos, pictures and locations
• Send any type of file (pdf, animated gif, mp3, doc, zip, etc.)
• Use Threema Web to chat from your Desktop
• Create groups
• Conduct polls with the poll feature
• Choose between a dark and a light theme
• Quickly and silently reply with the unique agree/disagree feature
• Verify the identity of a contact by scanning their personal QR code
• Use Threema as anonymous instant messaging tool
• Synchronize your contacts (optional)

All our servers are located in Switzerland, and we develop our software in-house.

Each Threema user receives a random Threema ID for identification. A phone number or email address is not required to use Threema. This unique feature allows you to use Threema completely anonymously – no need to give up private information or to open an account.

The source code of the Threema app is open for everyone to review. On top of that, renowned experts are regularly commissioned to conduct systematic security audits of Threema’s code.

Threema is not financed by advertising and does not collect user data.

For questions or problems please consult our FAQs:

Threema. The Secure Messenger App User Reviews & Comments

I love it but there is no Mac versionIt’s a great secure messaging app with huge potential but still needs some improvement. Hope it can support Mac OS soon!.Version: 3.0.9

Great but behind on featuresThis app is great for secure messaging and anonymity. I wish this app used a in-app purchase model so it could be downloaded for free to increase the user base. They could then charge an in-app purchase for features like voice calling, group chat, or other features that could be limited but allow for basic secure messaging for new users. However, for being a paid app, it seems to lag in features compared to competing products. I hope they add or fix some of these items: - Perfect Forward Secrecy on the end to end layer - self destructing and deleting messages - video calling - allow the user to do other messaging while a call is in progress..Version: 3.0.2

Threema can’t find my backupI upgraded my phone and was unable to restore my credentials, even though I had them backed up to the Threema Server some time ago. I even carefully had store my backup password. I lost all the documents that my family had sent me and all their communications - very upset and deleted the app forever..Version: 4.6.2

Alright appCool interface, and solid security protection from remote devices accessing information. I would recommend that they create a burn on read feature similar to wickr that deletes messages as they are read. Good protection unless someone has access to your physical device..Version: 4.3.2

Best app in the entire App StoreNo need to give your phone number out to anyone. THREEMA gives you an ID which you use instead of your phone number. No other secure messaging application allows you to protect your phone number in this way. Also, because you pay for THREEMA you know exactly why they’re doing what they’re doing. For money from you. You’re paying and this your data isn’t the price. I’ve been with THREEMA since the start and their developers come with constant improvements and updates. I love this app because it means freedom..Version: 4.1.3

Great product with German data protectionLove this app and its technical implementation!.Version: 3.0.1

Missing messages with this versionMissing messages, the other person receive the notification but not the messages. happened couple times already. if is fixed l'll give 5 ⭐️.Version: 3.0

Best messaging app for securityIf you want a pretty messenger, stick with the Messages app, Facebook, or maybe Signal - they’re all “secure”. If you want a secure messenger, get Threema. It sends messages securely from device to device, not user to user, so you need to think a bit differently about using it, but that difference in thinking is “this message is encrypted on my device and sent to that other device, which I’ve confirmed is the correct device by scanning its barcode”. This is handy (and one of my main uses) because you know that your snarky comment isn’t going to show up on your wife’s computer as she’s projecting her screen in the conference room at work. True device to device encryption, plus the company’s location in Switzerland with physical control over its servers, combines to make this a very secure messaging app. Even if you’re just using it to send snarky notes about employers, it’s worth the price..Version: 3.0.9

Way bettet then zoom 😆🇺🇸🇺🇸🇺🇸You should incorporate AI generated qr codes to every call and message for full anonimity👌✌️ i would pay 5 to 10 dollars if that was incorporated you could dominate britan,germany and china. maybe AI random generated IP address as well?.Version: 4.6.5

Great...needs a few changesI love Threema and the spirit of the developers' vision. I really trust this company. They just need a few additions. Needs a delete for everyone feature. This is very necessary for a number of reasons: error in typing, privacy, etc. Needs to make indicating bubbles of phone calls less intrusive, as they take up the same or more space as actual messages. Need conference calling. Near perfect app. Thank you. The ability to quote a picture...any message to or from. Also read receipts in group chats. Actually, this might catch on in the USA. I've got people looking at it. But still need to differentiate calls from actual messages in appearance..Version: 4.4.3

Last updateThis update made the app not opening unless disabled face detection.Version: 4.5.2

The best no question about that.First rule: you get what you if its free its crap or screwed you by the T&C. i like to see more support for the apple watch so that u can actually write a new message without the use of an notification of an unreaded message by the phone from the watch..Version: 3.0.8

Well executed but missing some featuresOn the security side the application is very well executed. On the messaging side there are a few features that would be desirable to have; The ability to quote a picture. Read receipts on messages in group chats (who in the group has seen your message)..Version: 4.3.2

The Best Secure Messenger!Threema offers the best security of any encrypted messaging app available! Not only is it based in the pro-privacy country of Switzerland, but it has also been comprehensively audited by a reputable Swiss security firm and found to have no vulnerabilities. The other great thing that makes it unique is that only you have access to your private key and you can exchange public keys directly with friends and family, which proves the identity of your contacts. This robust authentication protects your communications to a greater degree than similar apps. For more confirmation, check out past Security Now podcasts for why Threema is the best and most secure messenger you can use. If you are looking for a messaging app that gets security right, look no further than Threema..Version: 4.3.2

Calling works off and onHaving some issues with calling to another threema user it will ring sit on connecting and then disconnect. Work fine a couple times and had just stopped..Version: 3.0.1

Excellent call quality and stability. Highly recommended!!!We are calling half away around the world with very limited internet connection speeds, I mean very limited. We are amazed each time how clear and immediate the conversation can be. The stability is outstanding as well, calls are only dropped if I accidentally touch the wrong button!.Version: 4.6.3

New logoOnly thing I’d change is the icon. If your using this app and don’t want people to realize it’s a messaging app it’s kind of hard. The picture logo is literally a message bubble with a lock in it, which is pretty suspicious. Other than that I think it’s great..Version: 4.1

Perfect but…You should add “Delete For Everyone” feature, or make timing feature at leas..Version: 4.6.8

Needs option for disappearing messagesNearly perfect, but I hope they can include an option for disappearing messages in the near future, like signal does..Version: 4.5.4

Not impressedWhile threema works overall, I’m less than impressed with the audio overrides and the disconnects. If I’m on a call and play a video, the call will completely disconnect. If I’m playing music and merely open the app, it will kill my audio for about 5 seconds, and then artificially lower the volume. Drives me bonkers. I’m constantly having to go into my settings and revoke (or grant) permission to the microphone depending on what-else I’m doing. Very annoying and detracts from the usefulness of the app itself. I’ve contacted support and the only thing they could tell me was to upgrade to the newest version of it. I’m already running the newest version. It’s the only message app that has been incapable of handling audio in a competent way. Very disappointing to say the least..Version: 4.6.4

Great App. Needs an update.Great app for secured and private messaging. Only problem is you can’t delete your messages off of the receivers phone. Please add this feature, Telegram has this feature and love it for that reason. Add this feature in to your app and your app will be the best secured and private messaging app out there..Version: 4.6.5

Original soundI love Threema. High security messanger app. And Threema sound is very original!.Version: 4.6.3

You really need to add sync between devicesThis is almost a deal breaker, and certainly keeps from being able to use it for anything but messages that need to be secure. It’s one thing to deal with it for just your account, but when you tell that to other contacts and family it becomes impossible as most people just expect sync no a day's on iOS..Version: 4.6.3

Worth the price of your privacyEveryone should buy this to get better privacy..Version: 4.6.8

Needs delete for everyone option & viewed option for received messagesI like Threema but was horrified to discover that one cannot delete messages for everyone. I did not realize that all messages would remain on the receiver’s phone. I get confused on Threema when I have listened to an audio message because there is no indication that I have already listened to it. A check or something would be nice. If there are many audio messages and one gets interrupted, then it is unclear where to start relistening again. I do not like the red while recording messages, it is very distracting to the eye. I would prefer a milder color. I also like that in WhatsApp I can type a reply in the reply box while listening to a message but that does not work in Threema. Otherwise, I like the clean design of Threema and the privacy..Version: 4.5.4

Useful app! Keeps getting new featuresThis is a very helpful app and I'm very glad it exists..Version: 3.0

Great app with room for improvementPlease add stickers to Threema. It’s the only feature I miss when compared to other less secure and private apps! Thank you for your commitment to privacy and security..Version: 4.6.3

Great, but needs a disappearing msg featureSignal and others allow one to have messages over a user-definable age automatically erase from the device. Please consider this feature request. It also allows for shrinking the amount of data backed up and helps keep conversations ephemeral..Version: 4.5.3

Message RetractYou should be able to retract your messages and it doesn’t have this feature. Or Message expiration where messages get completely dusted after certain amount of time.Version: 3.0.9

Love Threema but,I’m giving Threema 5 STARS after it becomes open source but, what’s the point of all these features that added recently and Threema still blocked in many countries, what’s the point if I can’t call, text or send photos to anyone in my list. they can’t use Threema without a VPN 90% of my friends switched to another IM app because it’s available in their country’s that’s why Threema is not popular so until you find a way to use it without a VPN then we can enjoy all features otherwise it’s useless..Version: 4.6.4

Since the last update it hangs up oftenApp is also freezing since last update. Why do y’all keep screwing with it. Please add full Apple Watch support. This freezing is really messing with my system btw.Version: 4.3.2

This App is Great but...I am experiencing a bad experience when trying to send some pictures in this app. It get to long to sending, and mostly it failed, because i can not wait the pictures loading before close this app and move to another things i need to do on my phone. Please do something. I never tried video, but if pictures get that long, wondering how long the video will take.Version: 3.0.8

Awesome messengerCouple of touches are missing, such as video call support and if developer can enable sent message edit function for short period of time i.e you can edit your sent message within first 20 seconds, then would be awesome. Another thing, instead of tap and select, slide right/left would be much easier..Version: 4.2.1

Great at security, mostly great at the restThis looks like a messaging app written by people who take security seriously. Well done. I’m only taking off one star because the onboarding process was a mess. At one point, you’re asked to enter a password, and again to verify it. That’s all fine, but the password fields are so far down the page that the on-screen keyboard completely covers the second one — and the page doesn’t allow scrolling vertically! Eventually I discovered a workaround (tap Passwords, then Cancel, then tap the second password field, then blindly type your password on the keyboard that appears). But this is really something that should have been caught in testing. This makes it impossible (AFAICT) to paste a password from the clipboard, which discourages the use of strong passwords from a password manager. And that’s not good for security. Aside from that one major inconvenience, though, this looks like a great app..Version: 4.1.1

Best app there isDon’t have to use a phone number to setup an account. That’s so massively important. They actually charge for the app which is a major positive if you care about what their motivations should be. Privacy first and then they basically try to copy WhatsApp on features. Always a little behind on the feature list but you’re choosing privacy over minor functionality bonuses. My favorite app and I couldn’t support this company or their vision more..Version: 4.3

Good but no “edit message” functionThis could be the perfect secure messaging app if it were “fat-fingered perfectionist”-proof :D, as having to copy, delete, paste, edit, then resend just to “edit” a single sent message is so much hassle compared to just hitting an edit-button. For now I and my similarly fat-fingered perfectionist friends will be begrudgingly sticking with the less secure alternatives for now. If this is ever implemented, I will start recommending Threema, as otherwise the UX feels solid, better than Wire’s and even Signal’s. By the way, if the concern is with potentially allowing people to edit maliciously, maybe a mutual-consent-based “Allow editing of sent messages in chats” switch is an appropriate solution. Or perhaps just an “Edit history” list..Version: 4.5.3

Thank you Threema - you saved SlovakiaYour app revelaed the biggest political scandal in the Slovak Republic history. All you need is to break inside (it took police some months to do it - you might work on more secure standards) of one of the biggest influential oligarchs who used it for long time. Now all Slovakia could read the messages and reveal the biggest political and economical thefts made by politicians, oligarchs, mobs. So big thank you for liberating our country. (all in the news last two weeks).Version: 4.3.2

An inconvenient communication appSuch an inconvenient communication app for voice-messages. It doesn’t support running in iOS-background, which means it can’t automatically download voice-messages or images you received. Every time you get a incoming-voice notification, you have to open this app and tap the voice-message you received and wait for a long while to download it. If you don’t live in Europe, I strongly suggest you not to using it, because downloading voices-messages from Threema’s sever takes really long time. Not even to mention that if you receive more than one voice-messages, you have to tap them each one by one to download, waiting and waiting for these downloading processes. Too annoying!! What an era do we live in? Almost every communication app is now having this feature downloading media automatically..Version: 4.0.3

Cant type IDs that arent exactly 8 charsI dont know when this happened but My friend cannot send to my ID Because my ID is not exactly 8 Chars. It seems it cannot be more or less than 8 chars which were valid at some point earlier in the software history. EDIT This works correctly after investigating it further they were using the nickname and not the threema id under my profile.Version: 4.6.2

ResetI like this app but I just reset my phone and lost the app now I’m trying to open it again I’m not able please someone help me thanks. If I forgot my password any option to change it?.Version: 3.0.9

Good, but needs work.This is a solid, secure messaging app and I enjoy using it. Though, there are a few features I feel need to be seriously reconsidered, or perhaps even removed. 1. The ability to export an entire conversation Into a zip file without the secondary users consent 2. The inability to block users Other than that, this is a pretty solid app. In the future however, I would also recommend adding group administration options..Version: 4.4.3

Great app, currently is slowThe app lags for 3-7 seconds whenever I click any media. I will update to 5 stars when this is fixed..Version: 4.6.8

🤯No disappearing messages?!?🤯I love this app and all the privacy features it has to offer but I am blown away that it doesn’t have the option to users to choose or burn their messages (or conversations?!?) I’ll definitely give this app ⭐️⭐️⭐️⭐️⭐️ if (once) it’s added! 😇.Version: 3.0.3

Awesome (!) App, just the last update...Love the app, but ever since the last update to iOS13 it’s not possible anymore to see the text you add to a picture before sending it to THREEMA..Version: 4.3.2

Needs to be fixed since last updateEver since the last update the voice message recording has a bug. It records super silently and you have to pretty much hold the speaker right to your ear to be able to understand. Even if the volume is all the way up. Please fix that issue! It's very annoying!.Version: 3.0

The best private messaging appNone of the others can compare with Threema’s design and security..Version: 4.6.3

Great app. Fundamentally secure.I like threema because it is fundamentally secure and the model makes sense to me. I'm hoping for more features like being able to react with emojis instead of "agree/disagree". But other than that it's great.Version: 4.6.5

ExcellentWe hope the support of arabic.Version: 4.1

Get this app nowI’ve been using Threema for years It is by far the most safe and secure messaging app out there Once you pay for the original app, there are never any additional charges for any messages, pictures, videos, or texts sent... ever!! I used to pay a lot of money to send even just one text message to family members in Europe. Not anymore.. I hear this app is very popular in Europe, but somehow I don’t think it will ever catch on in the United States. But if you do purchase it, it is definitely worth it. You will need to tell your friends and your family members about the app because they need to have the app as well in order to communicate with you. Once anyone else has this app it’s the only way I communicate with them. They begin to use it too and it becomes your normal way of sending messages back and forth. Almost all of my text messages to people I know, go through Threema. Get this app and spread the word. Remember freedom means “No Big Brother!”.Version: 4.3.2

PasswordI don’t understand why in an upgrade some time ago they took away the letters under the numbers (as on a telephone) and never put them back. For me this makes it harder to use because I remember letters more easily than numbers, hence I have to look up my password, hence I use less..Version: 3.0.5

Free International Money Transfer 💸Enjoy high maximum transfers into more than 20 currencies while saving up to 90% over local banks! The cheap, fast way to send money abroad. Free transfer up to 500 USD!AdvertorialVersion: 4.6.9

Solid effort at encrypted communicationExcellent app so far with a little room for improvement..Version: 1.7.3

Highly RecommendedThis is without a doubt best in class for security and data encryption. Highly endorsed. Great job.Version: 4.0.1

Good app, but hide stale contacts is the dumbest feature I have seen in a whileThis is a very nice messaging app with excellent privacy features, but the feature to „inactivate“ and hide contacts that have not been on there is really the dumbest thing I’ve seen in a while, and I doubt it’s tested with users. From my perspective: 1) It will certainly hurt uptake of the app: Most people who decide on whether or not to use the app will check how many people are on there. Seeing only a few contacts will discourage them. See network effect. 2) Having „(inactive)“ display next to your name for 24 hours after you started using the app again just feels plain weird in an app that is boasting it’s privacy features. Who says I‘m inactive? And why doesn’t the very action of sending a message determine activity? Also, having to chat with „inactive“ contacts with the constant reminder that they are deemed inactive (it shows in the chat and in notifications) is an unpleasant experience..Version: 4.0.3

GOTTA FIX ASAPThis was meant to be the BEST from the REST.. every time you make phone calls it breaks up and I believe it’s not 100% encrypted and insecure.... IF I COULD RATE YOU IT WOULD BE ZERO!!! Who ever is running it should be sacked ASAP.👎🏽.Version: 4.3.2

Good appNice easy to use interface. I wish it used the Axolotl 2 protocol like TextSecure..Version: 2.1.0

Awesome secure messagingSecure messaging done properly. Exactly how I envisioned it working. Love the 3 star system and the QR codes..Version: 1.7.3

AuperWorthy alternative to others. Safe an easy to use.Version: 1.7.3

Well maintained and secureI’ve been using Threema for over five years. It’s constantly improved, secure and has a great feature set. I’ve never had it crash. Paying for it is a great, sustainable idea. I recommend anyone serious about privacy consider using Threema..Version: 4.6.4

Best messenger ever!So much better than WhatsApp! Very neat app, secure and super reliable! Perfect messenger!.Version: 1.7.3

IPad support!Needs to support iPad..Version: 1.9.1

FantasticA really great messaging app!!! It pains me to use other messaging apps now that I use Threema. Threema is definitely in a league of its own..Version: 2.3.1

Auto DeleteThe app needs auto delete, it does not have this function this its downfall..Version: 4.3.1

Everyone should be using thisEast to use, perfect UI and totally secure.Version: 4.3.1

PerfectEnd to end encryption. Clean. Fast. Dark theme was the cherry on top. Keep it up..Version: 2.6.0

Usabilty averageThere is still no high-res support for the latest ipad even after the most recent update. Disappointing. Until this is fixed it's unusable for me. Two stars..Version: 1.8.2

Threema. The Secure Messenger (Version: 4.6.9) App Screenshots
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Threema. The Secure Messenger 4.6.9 Update

Version 4.6.9 (2021-06-01): • Chinese (traditional) localization • Show duration of voice messages in chat overview • Improved call stability • Fixed a bug that could occur when copying video files • Fixed a possible UI glitch in the Share Extension • Various other improvements and miscellaneous minor bug fixes Note: If Threema doesn’t appear in the Share Sheet, restarting your device will resolve this iOS issue..

Version 4.6.8 (2021-05-11): Threema 4.6.8 • Fixed a crash that occurred on iOS 10 Threema 4.6.7 • New: Mark chats as unread (swipe right in chat overview) • Share Extension overhauled • Support for right-to-left scripts in chats • Chinese (simplified) localization • Japanese localization • Voice messages are no longer forwarded as files but as voice messages • Voice messages, GIFs, and stickers are hidden in media preview • Fixed a bug that could occur when quoting messages that contain mentions • Various other improvements and miscellaneous minor bug fixes Note: If Threema doesn’t appear in the Share Sheet, restarting your device will resolve this iOS issue..

Version 4.6.5 (2021-02-01): Threema 4.6.5 • Threema calls: Haptic feedback when call partner activates video transmission • Improved performance when sending messages in group chats • Fixed a crash that could occur when opening a chat in version 4.6.4 • Various other improvements and miscellaneous minor bug fixes Threema 4.6.4 • Increased maximum group size to 256 members • You can now quote any type of message (including media, voice messages, and locations) • Send images directly from gallery preview • Polish localization • Threema calls: Various bug fixes • iOS 14: Fixed a bug that could occur when deleting files • Various UI improvements • VoiceOver improvements on call screen • Various other improvements and miscellaneous minor bug fixes.

Version 4.6.4 (2021-01-25): • Increased maximum group size to 256 members • You can now quote any type of message (including media, voice messages, and locations) • Send images directly from gallery preview • Polish localization • Threema calls: Various bug fixes • iOS 14: Fixed a bug that could occur when deleting files • Various UI improvements • VoiceOver improvements on call screen • Various other improvements and miscellaneous minor bug fixes.

Version 4.6.3 (2020-11-11): • Option to add captions when sending media files within the app • iOS 14: Share individual photos without granting Threema access to the photo library • Size limit for chat exports removed • Truncate quoted messages after 200 characters • Always display search bar when creating group and editing groups • Various iOS 14 improvements • Layout improvements in Threema call screen • Various other improvements and miscellaneous bug fixes.

Version 4.6.2 (2020-09-21): • iOS 14: Fixed a bug that occurred when sharing videos via the Photos app.