Protect your privacy and make free mobile phone calls over the internet with Simlar. Your calls are fully encrypted. Simlar is very easy to use. Just select your contact and call them! After installation, all of your contacts who also use Simlar will be listed in the app automatically. Maybe some of your friends already have Simlar. It is also available for other smartphone platforms.

Simlar is based on the established end-to-end encryption protocol ZRTP. No one can listen to your conversation, not even us. During your first call, you need to match a short code with the person you are speaking to. This protects against man-in-the-middle attacks and only needs to be done once per contact. The app development is driven by the open source community. You can find the source code at

Simlar is free of charge. All you need is an internet connection. The
more stable your connection is, the better is your sound quality. The average “traffic”
corresponds to 1 megabyte for a 2-minute call. For more details see

What’s New

Version 1.1.6

• Support bluetooth headsets
• Calling single contacts is possible without granting Simlar access to contacts
• Display contact names as configured in global settings (sort order and order of first and last name)
• Send SMS through a more reliable provider (particularly USA and Canada)
• Fetch contacts in background to fix a crash on devices where loading of contacts is very slow
• Validate more international telephone numbers
• Update to Liblinphone 3.16.2 (featuring improved audio quality)

Ratings and Reviews

1.0 out of 5
2 Ratings
2 Ratings
Lexuormsjj ,

No tech support

The app is stuck halfway in loading mode. I tried deleting and reinstalling multiple times but it's already tied to my number. Wrote to tech support weeks ego. No response. No help.

Developer Response ,

We are very sorry to hear that you did not receive any response to your mails. Unfortunately, Gmail started to mark our answers as spam without informing us about this fact.
Regarding your problem, the upcoming release of Simlar will fix a problem with big address books.

Kid Kaji ,

007 spy style! amazing!

Amazing app. Makes me feel like James Bond. Any backdoors? Please reply.

Developer Response ,

Many thanks for your rating! There are no backdoors and the source code is publicly available on github.

Heklbg381 ,

App crashes and never installs or loads

Tried reinstalling over 20 times...

Developer Response ,

We are very sorry that Simlar does not work as expected. Could it be that your address book is quite big? That is, there are a few hundreds or thousands of contacts in it? If so, the upcoming version of Simlar will fix this problem.


Ben Sartor
20.7 MB

Requires iOS 9.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© The Simlar Authors


  • Family Sharing

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

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