# Belly Flow vs StrengthBox

The clearest difference is in-app purchases: Belly Flow at none against StrengthBox's 2. StrengthBox's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. StrengthBox sells 2 in-app purchases, starting at $5.99 per month. Belly Flow asks for nothing beyond the download.

Belly Flow ships an update every 3 weeks, StrengthBox every 2 days. The most recent releases landed on September 24, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Belly Flow | StrengthBox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 23 MB | 41 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Gabriella Broberg](https://appshunter.io/developer/1833119841) | [Innoveramera](https://appshunter.io/developer/1599090546) |

## What reviewers say

### Belly Flow

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

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

**In-app purchases:** none


### StrengthBox

[App page](https://appshunter.io/ios/app/strengthbox-workout-tracker/id6759178563)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Månad | $5.99 | per month |
| Årsplan | $39.99 | per year |


## Frequently asked questions

### Is Belly Flow free?

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

### Is StrengthBox free?

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

### Do Belly Flow or StrengthBox have ads?

Neither Belly Flow nor StrengthBox shows ads.

### Which is updated more often, Belly Flow or StrengthBox?

Belly Flow ships an update every 3 weeks, and StrengthBox every 2 days. Most recently, Belly Flow was updated on September 24, 2026 and StrengthBox on October 4, 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.*