# Sisu Training vs Belly Flow

The clearest difference is update cadence: Belly Flow at every 3 weeks against Sisu Training's every 6 weeks. 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.

Sisu Training ships an update every 6 weeks, Belly Flow every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Sisu Training | Belly Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 171 MB | 23 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kaisu Karttunen](https://appshunter.io/developer/1573623817) | [Gabriella Broberg](https://appshunter.io/developer/1833119841) |

## What reviewers say

### Sisu Training

[App page](https://appshunter.io/ios/app/sisu-training/id1573623365)

**Features:** Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Belly Flow

[App page](https://appshunter.io/ios/app/belly-flow/id6751012592)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sisu Training free?

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

### Is Belly Flow free?

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

### Do Sisu Training or Belly Flow have ads?

Neither Sisu Training nor Belly Flow shows ads.

### Which is updated more often, Sisu Training or Belly Flow?

Sisu Training ships an update every 6 weeks, and Belly Flow every 3 weeks. Most recently, Sisu Training was updated on October 25, 2026 and Belly Flow on October 25, 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.*