# 16 vs Simple Fasting

The clearest difference is ads: 16 at none against Simple Fasting's shown. 16 also leads on update cadence (every 9 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 16 sells 3 in-app purchases, starting at $1.99 per month and Simple Fasting sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

16 ships an update every 9 days, Simple Fasting every 4 months. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 16 | Simple Fasting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (54 ratings)](https://appshunter.io/ios/app/168-intermittent-fasting/id6708227128/reviews)** | — |
| Number of ratings | **54** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 28 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Heze Refresh Network Technology Co., Ltd](https://appshunter.io/developer/1690178793) | [UIXLY AS](https://appshunter.io/developer/6789231409) |

## What reviewers say

### 16

[App page](https://appshunter.io/ios/app/168-intermittent-fasting/id6708227128)

This app helps users adopt intermittent fasting by tracking fasting periods, weight changes, and daily water intake. It integrates with Apple Health to import exercise data, providing insights into daily activity alongside dietary progress.

**Highlights:** Fasting tracking, Weight tracking, Water intake tracking, HealthKit integration, Fasting progress visualization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $1.99 | per month |
| Pro (Yearly) | $8.99 | per year |
| Pro (Lifetime) | $17.99 | one-time |


### Simple Fasting

[App page](https://appshunter.io/ios/app/simple-fasting/id6756801491)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ADs | $0.99 | one-time |


## Frequently asked questions

### Is 16 free?

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

### Is Simple Fasting free?

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

### Do 16 or Simple Fasting have ads?

Simple Fasting shows ads; 16 does not.

### Which is updated more often, 16 or Simple Fasting?

16 ships an update every 9 days, and Simple Fasting every 4 months. Most recently, 16 was updated on October 24, 2026 and Simple Fasting 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.*