# Rotary 1640 vs Tchap

The clearest difference is device support: Tchap at 2 against Rotary 1640's —. Rotary 1640's advantage is iOS requirement (13.0 vs 18.5). On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Rotary 1640 | Tchap |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 51.9% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 3 weeks |
| Monetization | — | Free |
| Size | 14 MB | 367 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | — | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Jean-Paul Gontier](https://appshunter.io/developer/1695957534) | [DINSIC](https://appshunter.io/developer/1445678805) |

## What reviewers say

### Rotary 1640

[App page](https://appshunter.io/ios/app/rotary-1640/id6450964786)

**In-app purchases:** none


### Tchap

[App page](https://appshunter.io/ios/app/tchap/id6736991029)

This secure messaging app is the official instant messenger for French public agents. It offers enhanced performance, individual and group chats, audio/video calls, file sharing, and cross-device synchronization for professional communication.

**Highlights:** Individual and group messaging, Audio and video calls, File and document sharing, Agent directory access, Cross-device synchronization, External contact invitations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rotary 1640 free?

Rotary 1640 is free to download, with no in-app purchases.

### Is Tchap free?

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

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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.*