# Carnot vs RBL STUDIO

The clearest difference is update cadence: Carnot at every 4 days against RBL STUDIO's every 6 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.

Carnot ships an update every 4 days, RBL STUDIO every 6 months. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Carnot | RBL STUDIO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rbl-studio/id6448323664/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 months |
| Monetization | — | Free |
| Size | 25 MB | 67 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mainscope LLC](https://appshunter.io/developer/1481624653) | [Karen Olivarria](https://appshunter.io/developer/1582304605) |

## What reviewers say

### Carnot

[App page](https://appshunter.io/ios/app/carnot/id1663589443)

**Features:** macOS Compatibility

**In-app purchases:** none


### RBL STUDIO

[App page](https://appshunter.io/ios/app/rbl-studio/id6448323664)

Easily book your cycling classes and purchase class packages or memberships directly through the app. Manage your fitness routine conveniently from your mobile device.

**Highlights:** Book cycling classes, Purchase class packages, Buy memberships, Manage fitness routine, Easy to use interface

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Carnot free?

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

### Is RBL STUDIO free?

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

### Do Carnot or RBL STUDIO have ads?

Neither Carnot nor RBL STUDIO shows ads.

### Which is updated more often, Carnot or RBL STUDIO?

Carnot ships an update every 4 days, and RBL STUDIO every 6 months. Most recently, Carnot was updated on September 23, 2026 and RBL STUDIO on September 16, 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.*