# WaistProof vs Flow Fasting Tracker

The clearest difference is in-app purchases: WaistProof at none against Flow Fasting Tracker's 2. Flow Fasting Tracker's advantage is iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Flow Fasting Tracker sells 2 in-app purchases, starting at $7.99 per month. WaistProof asks for nothing beyond the download.

WaistProof ships an update every 8 days, Flow Fasting Tracker every 10 days. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | WaistProof | Flow Fasting Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 10 days |
| Size | 50 MB | 16 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Dan Tong](https://appshunter.io/developer/1889379985) | [Kristina Kozicynaite](https://appshunter.io/developer/1882882099) |

## What reviewers say

### WaistProof

[App page](https://appshunter.io/ios/app/waistproof-waist-tracker/id6761399338)

**Features:** macOS Compatibility

**In-app purchases:** none


### Flow Fasting Tracker

[App page](https://appshunter.io/ios/app/flow-fasting-tracker/id6776109275)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $7.99 | per month |
| Annual | $39.99 | per year |


## Frequently asked questions

### Is WaistProof free?

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

### Is Flow Fasting Tracker free?

Flow Fasting Tracker is free to download, with in-app purchases available.

### Do WaistProof or Flow Fasting Tracker have ads?

Neither WaistProof nor Flow Fasting Tracker shows ads.

### Which is updated more often, WaistProof or Flow Fasting Tracker?

WaistProof ships an update every 8 days, and Flow Fasting Tracker every 10 days. Most recently, WaistProof was updated on October 25, 2026 and Flow Fasting Tracker on October 13, 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.*