# Cérélys vs Fourdata

The clearest difference is update cadence: Cérélys at every 5 weeks against Fourdata's every 5 months. 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.

Cérélys ships an update every 5 weeks, Fourdata every 5 months. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Cérélys | Fourdata |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Size | 84 MB | 28 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ANALYS INFORMATIQUE](https://appshunter.io/developer/1465595739) | [SARL 4factorielle](https://appshunter.io/developer/1450291869) |

## What reviewers say

### Cérélys

[App page](https://appshunter.io/ios/app/cerelys/id1465595740)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fourdata

[App page](https://appshunter.io/ios/app/fourdata/id1636265692)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cérélys free?

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

### Is Fourdata free?

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

### Do Cérélys or Fourdata have ads?

Neither Cérélys nor Fourdata shows ads.

### Which is updated more often, Cérélys or Fourdata?

Cérélys ships an update every 5 weeks, and Fourdata every 5 months. Most recently, Cérélys was updated on September 18, 2026 and Fourdata on September 12, 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.*