# Simlar - secure calls

> Encrypted, free internet calls with automatic contact syncing. (iPhone/iPad app by Ben Sartor.)

- Source: https://appshunter.io/ios/app/simlar-secure-calls/id953945396 (this page in markdown: same URL + `.md`)
- Developer: [Ben Sartor](https://appshunter.io/developer/953945395)
- Category: Social Networking
- Price: Free
- Rating: 2.30/5 from 3 App Store ratings · 21 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 60 MB
- Languages: American English
- Released: 2015-01-21
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/simlar-secure-calls/id953945396/reviews.md

## What is Simlar?

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.

## Key features

- Free internet calls
- End-to-end encryption
- Automatic contact syncing
- Easy to use interface
- Open-source development
- Cross-platform availability

## Recent user reviews (10 of 21)

All indexed reviews: https://appshunter.io/ios/app/simlar-secure-calls/id953945396/reviews.md

### 5/5 — Easy to handle

*2024-04-05, version 2.7.0*

Übersichtlich und einfach gestaltet, alles so wie erwartet :)

### 5/5 — Good app. Only they have to add messenger.

*2021-09-26, version 2.3.10*

Very good App. But they have to add Messenger, otherwise it looks incomplete.

### 1/5 — Wenn mich jemand anruft dann dann keine Reaktion der App

*2020-07-09, version 2.2.7*

Angerufen werden geht nicht. Anrufen geht.

### 1/5 — Перестаёт работать через 30 секунд

*2019-10-27, version 2.1.3*

Через 30 секунд после разговора с собеседником просто пропадает звук(((( А я так любил эту программу. Прошу дать комментарий, как устранить ошибку

### 1/5 — Nicht anonym

*2019-10-24, version 2.1.3*

Benutze die App Kedr. Ist gleich, nur mit chat und es ist anonym, da man die rufnummer nicht eingeben muss (ist freiwillig), sondern nur einen spitznamen.

### 3/5 — Не работает

*2019-10-01, version 2.0.1*

Не работает с ios13

### 1/5 — Stopped working

*2019-04-15, version 1.1.6*

Stopped working a week ago. Says “you have requested too many contacts. Try again in 24 hours”. iOS 12.2

### 1/5 — App

*2019-04-09, version 1.1.6*

Bisher keine Antwort vom Support dann neue Bewertung

### 4/5 — iOS 12?

*2018-11-25, version 1.1.6*

С iOS 12 не пашет. Пишет при синхронизации контактов ошибка. Апгрейд плиз под ос

### 5/5 — Super App

*2017-05-07, version 1.1.6*

Leider funktioniert es noch nicht unter 8.1.3. Freisprechen fehlt noch, dann ist es perfekt.
Top jetzt geht's. 👍👍👍👍👍

## Frequently asked questions about Simlar

### What is Simlar?

Simlar is a free application that allows users to make fully encrypted mobile phone calls over the internet. It is based on the ZRTP end-to-end encryption protocol for enhanced privacy.

### How does Simlar ensure call security?

Simlar uses the ZRTP protocol for end-to-end encryption, meaning no one, not even the developers, can listen to your conversations. A one-time code matching process is required per contact to prevent man-in-the-middle attacks.

### Is Simlar free to use?

Yes, Simlar is completely free of charge. The only requirement is an internet connection to make calls.

### How does Simlar handle contacts?

After installation, Simlar automatically lists contacts who also have the app installed on their devices, making it easy to initiate calls with them.

### What are the system requirements for Simlar?

Simlar is available for iPhone, iPad, and iPod devices. It requires an internet connection for calls, and stable connections improve sound quality.

### How often is Simlar updated?

The latest version of Simlar is 2.8.2, which was last updated on July 24, 2025. The app's development is driven by the open-source community.

### What is the user sentiment for Simlar?

Simlar has a rating of 2.3 stars from 3 ratings, indicating a mixed to negative user reception based on the limited available data.

### Does Simlar have ads?

No, Simlar does not contain advertisements. It is a free application that relies solely on an internet connection for its functionality.

## Version history (last 5 releases)

### 2.8.2 — 2025-07-24

* Use post quantum encryption
* Linphone Sdk Update 5.3.110
* Validate more international telephone numbers
* Small improvements and fixes

### 2.8.0 — 2025-07-14

* Use post quantum encryption
* Linphone Sdk Update 5.3.110
* Validate more international telephone numbers
* Small improvements and fixes

### 2.7.1 — 2024-07-17

* Use post quantum encryption
* Linphone Sdk Update 5.3.63
* Validate more international telephone numbers
* Small improvements and fixes

### 2.7.0 — 2024-02-15

* Use post quantum encryption
* Linphone Sdk Update 5.3.5
* Validate more international telephone numbers
* Small improvements and fixes

### 2.6.3 — 2023-10-12

* Use post quantum encryption
* Greatly improve call connection establishment
* Linphone Sdk Update 5.2.102
* Validate more international telephone numbers
* Small improvements and fixes

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| --- | --- | --- | --- |
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| [Crypviser Secure Messenger](https://appshunter.io/ios/app/crypviser-secure-messenger/id1282141716) | 4.5 (81) | Free | Social Networking |
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## Related topics

[secure calls](https://appshunter.io/ios/topics/secure-calls)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*