# CF Systèmes vs AREI Calc

The clearest difference is in-app purchases: CF Systèmes at none against AREI Calc's 2. CF Systèmes also leads on update cadence (every 10 days vs every 2 months) and iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. AREI Calc sells 2 one-off in-app purchases. CF Systèmes asks for nothing beyond the download.

CF Systèmes ships an update every 10 days, AREI Calc every 2 months. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CF Systèmes | AREI Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Size | 102 MB | 32 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Agence Cinquante5](https://appshunter.io/developer/1167490817) | [Volkan Alanya](https://appshunter.io/developer/6784566902) |

## What reviewers say

### CF Systèmes

[App page](https://appshunter.io/ios/app/cf-systemes/id6446024772)

**Features:** macOS Compatibility

**In-app purchases:** none


### AREI Calc

[App page](https://appshunter.io/ios/app/arei-calc/id6792518137)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Eigenaar-pakket | $6.99 | one-time |
| PRO — alle tools | $12.99 | one-time |


## Frequently asked questions

### Is CF Systèmes free?

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

### Is AREI Calc free?

AREI Calc is free to download, with in-app purchases available.

### Do CF Systèmes or AREI Calc have ads?

Neither CF Systèmes nor AREI Calc shows ads.

### Which is updated more often, CF Systèmes or AREI Calc?

CF Systèmes ships an update every 10 days, and AREI Calc every 2 months. Most recently, CF Systèmes was updated on October 25, 2026 and AREI Calc on October 31, 2026.

---

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