# CSE RT Lyon vs BâtiSain

The clearest difference is update cadence: BâtiSain at every 3 days against CSE RT Lyon's every 28 months. CSE RT Lyon's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

CSE RT Lyon ships an update every 28 months, BâtiSain every 3 days. The most recent releases landed on November 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | CSE RT Lyon | BâtiSain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 28 months | **Every 3 days** |
| Size | 68 MB | 59 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Comite Social et Economique Renault Trucks Lyon](https://appshunter.io/developer/1577192042) | [Secarius](https://appshunter.io/developer/6785827710) |

## What reviewers say

### CSE RT Lyon

[App page](https://appshunter.io/ios/app/cse-rt-lyon/id1533788859)

**Features:** macOS Compatibility

**In-app purchases:** none


### BâtiSain

[App page](https://appshunter.io/ios/app/batisain/id6790838915)

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

**In-app purchases:** none


## Frequently asked questions

### Is CSE RT Lyon free?

CSE RT Lyon is free to download, with no in-app purchases.

### Is BâtiSain free?

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

### Do CSE RT Lyon or BâtiSain have ads?

Both CSE RT Lyon and BâtiSain show ads.

### Which is updated more often, CSE RT Lyon or BâtiSain?

CSE RT Lyon ships an update every 28 months, and BâtiSain every 3 days. Most recently, CSE RT Lyon was updated on November 7, 2026 and BâtiSain on October 28, 2026.

---

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