# Fasting Mastery vs FastFlow

The clearest difference is ads: Fasting Mastery at none against FastFlow's shown. Fasting Mastery also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Fasting Mastery sells 3 in-app purchases, starting at $1.99 per month and FastFlow sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Fasting Mastery ships an update every 4 days, FastFlow every 5 days. The most recent releases landed on September 11, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Fasting Mastery | FastFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 73 MB | 11 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Yasiru Abeygunawardana](https://appshunter.io/developer/1886383088) | [浩铭 顾](https://appshunter.io/developer/1873844063) |

## What reviewers say

### Fasting Mastery

[App page](https://appshunter.io/ios/app/fasting-mastery/id6760818321)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Quarterly | $2.99 | per 3 months |
| Annual | $9.99 | per year |


### FastFlow

[App page](https://appshunter.io/ios/app/fastflow-fasting-timer/id6760942083)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastFlow Pro Monthly | $0.99 | per month |
| FastFlow Pro Yearly | $9.99 | per year |


## Frequently asked questions

### Is Fasting Mastery free?

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

### Is FastFlow free?

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

### Do Fasting Mastery or FastFlow have ads?

FastFlow shows ads; Fasting Mastery does not.

### Which is updated more often, Fasting Mastery or FastFlow?

Fasting Mastery ships an update every 4 days, and FastFlow every 5 days. Most recently, Fasting Mastery was updated on September 11, 2026 and FastFlow 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.*