FortKnoxster is a FREE app to communicate privately and securely. FortKnoxster uses only your Internet connection, NO call charges, chat and call your friends, family and colleagues from anywhere in the world for FREE.
- Chat including Group Chat
- Invite-Only Mail, Communicate securely by invitation only, no risk of privacy breaches or system hacks
- Voice & Video Calls. Call your friends, family, colleagues, partners worldwide
- Screen Share, share your screen privately
- File Share Securely & Privately including Photos, Videos & Voice Messages
- End to End Encryption on all features

FortKnoxster is simple, FREE and easy-to-use. FortKnoxster protects your online privacy by encrypting all your communication and data with NO FEES.

We offer you maximum SAFETY & PRIVACY. Secure communications are our specialty.
Our platform operates on a ZERO KNOWLEDGE principle which means complete privacy. NO ONE else has access to YOUR personal information.

FortKnoxster privacy features:
* End-to-end encrypted communication & data.
* Blockchain technology for decentralized trust of digital identities
* Decentralized cloud storage
* Self-destruct messages.
* Zero-Knowledge concept – we can never access your messages or data.
* Push notifications let you know when new messages have arrived.
* Integrated with the FortKnoxster web app – extend your security also to your PC/Mac.
* Privacy protected – your encrypted data will never be given to third parties.

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What happens in FortKnoxster stays in FortKnoxster.

What’s New

Version 1.7.0

Thanks for using FortKnoxster! We regularly update our apps to bring you new features, improved performance and security.

- NEW Email signup replaces phone/SMS signup

- NEW FortKnoxster design look & feel

- NEW Typing indication in chats

- NEW Dynamic font size support

- NEW Tap chat message options & voice message

- Several improvements to call performance & UI

- Improved overall connectivity

- Several security updates & enhancements

- General improvements & bug fixing

Ratings and Reviews

4.7 out of 5
38 Ratings

38 Ratings

Eltoomer ,

Works Perfectly

I really enjoy Fort Knoxster. My favorite part about this app is not only I can call and text friends but also send encrypted email. The call quality is great and I never experienced any issues. I would highly recommend this app to anyone.

AnnoyedUpstoxUser ,

I like this app but slight UI improvement required

Used this app. Like it. I find that it’s seamless in its connectivity whether voice call or video call. However I think that the UI can be even better. Some more colorful features.

Fortknoxster should have the option to key in Profile name than using Login ID used as Profile name. Since this function is not available, I have a series of odd names in my FortKnoxster contacts list, which gives a confusing visual while using the app.

369pace ,

So Easy to Use!

The Fort Knoxster app has made it so easy for me to keep my conversations private and under security. I’ve never felt safer using an app. It runs so smoothly and have had no issues with it. I definitely recommend this to everyone!

App Privacy

The developer, FortKnoxster Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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