Simlar - secure calls

155 reviews
Content rating
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About this app

Protect your privacy and make free mobile phone calls over the internet with Simlar. Your calls are fully encrypted and tap-proof. 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. If not, you can invite them easily. Simlar is also available for iPhones.

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 it is, the better your sound quality. The average “traffic” corresponds to 1 megabyte for a 2-minute call. For more details see
Updated on
Nov 10, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info and App info and performance
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

144 reviews
Mohamed Ariff
June 14, 2023
It was working good. For past few days it's not loading the contacts. I tried reinstalling the app. Still I have the same problem. Update: Now everything started working good. Thanks for your kind and immediate response.
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June 14, 2023
Thank you for reporting the bug. We had a hardware defect in one of our servers. They are up and running again.
A Google user
March 8, 2019
if NDNC is blocking your SMS then please send me the code on Signal App, this has happened in the past and your team was able to send the code on Signal. And at least have the courtesy to reply to my email.
9 people found this review helpful
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April 17, 2019
The NDNC India (National Do Not Call Registry in India) blocks our SMS. Unfortunately, there is still nothing we can do about. Re-sending registration codes via Signal is a manual process. We are a non-profit project and have day jobs, so we simply cannot afford that on a regular basis.
Marcia Smith
November 11, 2020
Ive always used this app but now android 11 the app automatically closes when i press to register my number
6 people found this review helpful
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What's new

• Use post quantum encryption
• Improve Call establishment
• Linphone Sdk Update 5.2.110
• Validate more international telephone numbers
• Small improvements and fixes

App support