# Intermittent Fasting vs FastFlow

The clearest difference is update cadence: FastFlow at every 2 days against Intermittent Fasting's fortnightly. Intermittent Fasting's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Intermittent Fasting sells 2 in-app purchases, starting at $3.99 per 7 days and FastFlow sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Intermittent Fasting ships an update fortnightly, FastFlow every 2 days. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Intermittent Fasting | FastFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 30 MB | 35 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Manuel Worlitzer](https://appshunter.io/developer/1785527240) | [Uprise iX LLC](https://appshunter.io/developer/1809234369) |

## What reviewers say

### Intermittent Fasting

[App page](https://appshunter.io/ios/app/intermittent-fasting-plan/id6749179087)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intermittent Fasting Premium | $3.99 | per 7 days |
| Intermittent Fasting Premium | $19.99 | per year |


### FastFlow

[App page](https://appshunter.io/ios/app/fastflow-intermittent-fasting/id6758635076)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Weekly Subscription | $8.99 | per 7 days |


## Frequently asked questions

### Is Intermittent Fasting free?

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

### Is FastFlow free?

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

### Do Intermittent Fasting or FastFlow have ads?

Neither Intermittent Fasting nor FastFlow shows ads.

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

Intermittent Fasting ships an update fortnightly, and FastFlow every 2 days. Most recently, Intermittent Fasting was updated on October 9, 2026 and FastFlow on October 14, 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.*