# Tchap vs zigzag project

The clearest difference is update cadence: zigzag project at weekly against Tchap's every 3 weeks. zigzag project also leads on iOS requirement (14.0 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.

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

Tchap ships an update every 3 weeks, zigzag project weekly. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Tchap | zigzag project |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 51.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 367 MB | 37 MB |
| Requires iOS | 18.5 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [DINSIC](https://appshunter.io/developer/1445678805) | [Theo Eiferman](https://appshunter.io/developer/1849255187) |

## What reviewers say

### 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


### zigzag project

[App page](https://appshunter.io/ios/app/zigzag-project/id6754614690)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tchap free?

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

### Is zigzag project free?

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

### Do Tchap or zigzag project have ads?

Neither Tchap nor zigzag project shows ads.

### Which is updated more often, Tchap or zigzag project?

Tchap ships an update every 3 weeks, and zigzag project weekly. Most recently, Tchap was updated on October 21, 2026 and zigzag project on October 8, 2026.

---

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