# FastFlow vs YOHAKU

The clearest difference is in-app purchases: FastFlow at none against YOHAKU's 2. YOHAKU's advantage is ads (none vs shown) and update cadence (every 6 days vs every 4 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. YOHAKU sells 2 in-app purchases, starting at $4.99 per month. FastFlow asks for nothing beyond the download.

FastFlow ships an update every 4 months, YOHAKU every 6 days. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | FastFlow | YOHAKU |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Ad-supported | — |
| Size | 34 MB | 38 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Caprio Lab](https://appshunter.io/developer/1841174043) | [TOMOHIRO WADA](https://appshunter.io/developer/1857967064) |

## What reviewers say

### FastFlow

[App page](https://appshunter.io/ios/app/fastflow-fasting-tracker/id6756208094)

This app helps users manage intermittent fasting schedules with a visual timer and customizable patterns. It also allows for weight tracking, meal logging with photos, and smart notifications to build healthy habits.

**Highlights:** Circular fasting timer, Flexible fasting patterns, Weight progress graph, Meal logging with photos, Smart notifications, Cloud data sync

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

**In-app purchases:** none


### YOHAKU

[App page](https://appshunter.io/ios/app/yohaku/id6760961955)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| YOHAKU プレミアム（月額） | $4.99 | per month |
| YOHAKU プレミアム（年額） | $24.99 | per year |


## Frequently asked questions

### Is FastFlow free?

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

### Is YOHAKU free?

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

### Do FastFlow or YOHAKU have ads?

FastFlow shows ads; YOHAKU does not.

### Which is updated more often, FastFlow or YOHAKU?

FastFlow ships an update every 4 months, and YOHAKU every 6 days. Most recently, FastFlow was updated on October 3, 2026 and YOHAKU on October 8, 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.*