# 16/8 vs Onefast

The clearest difference is update cadence: Onefast at every 2 days against 16/8's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 16/8 sells 2 in-app purchases, starting at $1.99 per month and Onefast sells 2 in-app purchases, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

16/8 ships an update every 8 days, Onefast every 2 days. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 16/8 | Onefast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/168-fasting-and-water-tracker/id6751299580/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 52 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pug Health LLC](https://appshunter.io/developer/425676529) | [Nguyen Dinh Chung](https://appshunter.io/developer/6805296065) |

## What reviewers say

### 16/8

[App page](https://appshunter.io/ios/app/168-fasting-and-water-tracker/id6751299580)

This app simplifies intermittent fasting with a 16:8 schedule and integrates hydration tracking to enhance your fasting experience. It helps you build a consistent daily routine for better focus and sustained fasting.

**Highlights:** One-tap 16:8 fasting start, Instant fasting status display, Water intake logging, Daily routine consistency, Hydration benefits during fasting

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Yearly Plan | $19.99 | per year |


### Onefast

[App page](https://appshunter.io/ios/app/onefast-fasting-timer/id6810987516)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Onefast Pro (Yearly) | $9.99 | per year |
| Onefast Pro (Lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is 16/8 free?

16/8 is free to download, with in-app purchases available.

### Is Onefast free?

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

### Do 16/8 or Onefast have ads?

Neither 16/8 nor Onefast shows ads.

### Which is updated more often, 16/8 or Onefast?

16/8 ships an update every 8 days, and Onefast every 2 days. Most recently, 16/8 was updated on October 23, 2026 and Onefast on October 4, 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.*