Simlar - secure calls APK

Simlar – Secure and Private Internet Calls

Overview

• Simlar is a free mobile application designed to protect your privacy while allowing you to make high-quality voice calls over the internet.

• It provides a simple and secure way to communicate with friends, family, or colleagues without worrying about your conversations being intercepted or monitored.

• The app combines strong encryption technology with an intuitive interface, ensuring that even first-time users can enjoy complete privacy without technical complications.

Key Features

• End-to-End Encryption: Every call is fully encrypted using the robust ZRTP protocol, ensuring absolute confidentiality.

• User-Friendly Interface: Making a call is as straightforward as selecting a contact and pressing the call button.

• Automatic Contact Detection: After installation, Simlar automatically identifies which of your contacts are already using the app, making it effortless to connect securely.

• Cross-Platform Availability: Simlar is available for both Android devices and iPhones, ensuring compatibility across major mobile platforms.

• Invitation System: If your friends aren’t using Simlar yet, you can easily invite them directly from the app.

Security and Privacy

• Simlar’s security is based on the proven ZRTP end-to-end encryption standard.

• This means that no third party—including the service operators—can access the contents of your conversations.

• During your first call with a new contact, you simply verify a short security code together, which prevents man-in-the-middle attacks.

• Once this initial verification is complete, future calls with that contact remain automatically protected.

Open Source Development

• Simlar’s code is open source and maintained by an active community of developers committed to transparency and continuous improvement.

• Anyone can inspect the source code, contribute to its development, or learn more via simlar.org.

Performance and Data Usage

• Simlar is completely free; you only need an internet connection.

• The quality of calls depends on the stability of your connection—the steadier it is, the clearer the audio.

• On average, a two-minute Simlar call uses about one megabyte of data.

FAQ

Q: Is Simlar really free to use?

A: Yes, Simlar is entirely free. There are no subscription fees or hidden charges. All you need is an internet connection, such as Wi-Fi or mobile data, to make and receive calls through the app.

Q: How secure are the calls made with Simlar?

A: Every call made with Simlar is secured using strong end-to-end encryption based on the ZRTP standard. This means that no one—not even Simlar’s operators—can listen in or access the content of your conversations.

Q: What is ZRTP encryption and why does Simlar use it?

A: ZRTP is a well-established encryption protocol specifically designed for securing voice communication. It doesn’t rely on a central server for encryption keys, which prevents third parties from decrypting your calls. Simlar uses ZRTP to ensure the highest level of confidentiality for its users.

Version History

v2.13.1——23 Oct 2025

Protect your privacy with encrypted phone calls. Download the latest version of Simlar - secure calls to enjoy new features and updates immediately!

*2.13.1

• Use post quantum encryption

• Android SDK 35

• Linphone Sdk Update 5.4.24

• Validate more international telephone numbers

• Small improvements and fixes

*2.13.0

• Use post quantum encryption

• Android SDK 35

• Linphone Sdk Update 5.4.24

• Validate more international telephone numbers

• Small improvements and fixes

*2.12.0

liblinphone 5.3.84, dependency updates