Simlar - secure calls2.8.2 - App Store

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.org.

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 simlar.org.

Version History * Use post quantum encryption
* Linphone Sdk Update 5.3.110
* Validate more international telephone numbers
* Small improvements and fixes 2.8.2 07/24/2025 * Use post quantum encryption
* Linphone Sdk Update 5.3.110
* Validate more international telephone numbers
* Small improvements and fixes 2.8.0 07/14/2025 * Use post quantum encryption
* Linphone Sdk Update 5.3.63
* Validate more international telephone numbers
* Small improvements and fixes 2.7.1 07/17/2024 * Use post quantum encryption
* Linphone Sdk Update 5.3.5
* Validate more international telephone numbers
* Small improvements and fixes 2.7.0 02/15/2024 * Use post quantum encryption
* Greatly improve call connection establishment
* Linphone Sdk Update 5.2.102
* Validate more international telephone numbers
* Small improvements and fixes 2.6.3 10/12/2023 * Use post quantum encryption
* Greatly improve call connection establishment
* Linphone Sdk Update 5.2.51
* Validate more international telephone numbers
* Small improvements and fixes 2.6.2 05/31/2023 * Use post quantum encryption
* Greatly improve call connection establishment
* Linphone Sdk Update 5.2.11
* Validate more international telephone numbers
* Small improvements and fixes 2.6.0 03/14/2023 * Greatly improve call connection establishment
* Linphone Sdk Update 5.2.11
* Validate more international telephone numbers
* Small improvements and fixes 2.5.0 02/01/2023 * Greatly improve call connection establishment
* Linphone Sdk Update 5.1.62
* Validate more international telephone numbers
* Small improvements and fixes 2.4.0 11/24/2022 * Linphone Sdk Update 4.4.35
* Validate more international telephone numbers
* Small improvements and fixes 2.3.10 05/30/2021 * Linphone Sdk Update 4.4.32
* Validate more international telephone numbers
* Small improvements and fixes 2.3.9 03/31/2021 * Linphone Sdk Update 4.4.24
* Validate more international telephone numbers
* Small improvements and fixes 2.3.8 02/26/2021 * Linphone Sdk Update 4.4.21
* Validate more international telephone numbers
* Small improvements and fixes 2.3.7 01/20/2021 * Linphone Sdk Update 4.4.20
* Validate more international telephone numbers
* Small improvements and fixes 2.3.6 01/05/2021 * Fix Connection Problems
* Linphone Sdk Update 4.4.17
* Validate more international telephone numbers
* Small improvements and fixes 2.3.5 12/20/2020 * Improved incoming calla with CallKit
* Linphone Sdk Update 4.4.8
* Validate more international telephone numbers
* Small improvements and fixes 2.3.3 11/27/2020 * Improved incoming calla with CallKit
* Linphone Sdk Update 4.4.6
* Validate more international telephone numbers
* Small improvements and fixes 2.3.2 11/14/2020 * Improved incoming calla with CallKit
* Linphone Sdk Update 4.4.1
* Validate more international telephone numbers
* Small improvements and fixes 2.3.0 10/08/2020 * Improved incoming calla with CallKit
* Linphone Sdk Update 4.3.1
* Validate more international telephone numbers
* Small improvements and fixes 2.2.7 03/26/2020 * Compatible with iOS 13 2.1.3 10/11/2019 • New App Icon
• Validate more international telephone numbers
• Update to Liblinphone 4.2 2.0.1 08/21/2019 • 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) 1.1.6 04/18/2017 * Incoming calls vibrate more than once now.
* Incoming call notifications have buttons to decline and accept now.
* liblinphone 3.12 0.0.8 06/28/2016 * liblinphone 2.3
* If call encryption is not possible, Simlar disconnects now instead of playing an alarm sound. 0.0.6 09/10/2015 * Simlar calls stay on hold when interrupted by normal incoming call
* Mute microphone
* Speaker on/off 0.0.5 06/12/2015