# Flex Messenger vs IMMUNE Messenger

The clearest difference is update cadence: IMMUNE Messenger at every 6 weeks against Flex Messenger's every 6 months. Flex Messenger's advantage is iOS requirement (8.0 vs 15.5). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Flex Messenger against 5.0 for IMMUNE Messenger. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Flex Messenger ships an update every 6 months, IMMUNE Messenger every 6 weeks. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Flex Messenger | IMMUNE Messenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/flex-messenger/id1078486343/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/immune-messenger/id1489335158/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 120 MB | 88 MB |
| Requires iOS | **8.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Colbook Investment Limited](https://appshunter.io/developer/996739770) | [IMM Money Messenger Limited](https://appshunter.io/developer/1489335157) |

## What reviewers say

### Flex Messenger

[App page](https://appshunter.io/ios/app/flex-messenger/id1078486343)

A fast, secure, and free communication app that syncs across all devices. Send unlimited messages, documents, voice memos, images, and videos. Enjoy private group chats and make free HD calls.

**Highlights:** Unlimited messaging, File sharing (any type), Large group chats, Free HD voice and video calls, Cross-device sync, End-to-end encryption

**Features:** macOS Compatibility

**In-app purchases:** none


### IMMUNE Messenger

[App page](https://appshunter.io/ios/app/immune-messenger/id1489335158)

This secure messaging app offers end-to-end encrypted chats and calls, with a built-in crypto wallet for easy Bitcoin transfers directly within conversations. It prioritizes user privacy by not storing data on servers, ensuring all communications remain on your device.

**Highlights:** End-to-end encrypted messaging, P2P voice and video calls, Built-in Bitcoin wallet, Direct Bitcoin transfers, Ad-free experience, File and media sharing

**Features:** macOS Compatibility, Siri integration, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Flex Messenger free?

Flex Messenger is free to download, with no in-app purchases.

### Is IMMUNE Messenger free?

IMMUNE Messenger is free to download, with no in-app purchases.

### Which has better reviews, Flex Messenger or IMMUNE Messenger?

Flex Messenger and IMMUNE Messenger are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Flex Messenger or IMMUNE Messenger have ads?

Neither Flex Messenger nor IMMUNE Messenger shows ads.

### Which is updated more often, Flex Messenger or IMMUNE Messenger?

Flex Messenger ships an update every 6 months, and IMMUNE Messenger every 6 weeks. Most recently, Flex Messenger was updated on October 12, 2026 and IMMUNE Messenger on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*