# FastFlow vs Pengu

The clearest difference is ads: Pengu at none against FastFlow's shown. Pengu also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. FastFlow sells 2 in-app purchases, starting at $0.99 per month and Pengu sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

FastFlow ships an update every 5 days, Pengu every 9 days. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | FastFlow | Pengu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pengu-fasting-and-meal-tracker/id6767768160/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | — | Freemium |
| Size | 11 MB | 58 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [浩铭 顾](https://appshunter.io/developer/1873844063) | [junhee cho](https://appshunter.io/developer/1884842008) |

## What reviewers say

### 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 |


### Pengu

[App page](https://appshunter.io/ios/app/pengu-fasting-and-meal-tracker/id6767768160)

Track your intermittent fasting and meals with a gentle approach. Features include fasting timers, one-photo meal logging with auto-detection, and calorie counting. Monitor your progress with a visual mascot and calendar view.

**Highlights:** Intermittent fasting timers (16:8, 18:6), One-photo meal logging, Calorie and nutrition tracking, Penguin progress mascot, Auto-detected food menus, Calendar view of past data

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pengu Pro Weekly | $4.99 | per 7 days |
| Pengu Pro Monthly | $5.99 | per month |
| Pengu Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is FastFlow free?

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

### Is Pengu free?

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

### Do FastFlow or Pengu have ads?

FastFlow shows ads; Pengu does not.

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

FastFlow ships an update every 5 days, and Pengu every 9 days. Most recently, FastFlow was updated on October 3, 2026 and Pengu on October 12, 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.*