# Fasting Tracker vs 16

The clearest difference is in-app purchases: Fasting Tracker at none against 16's 3. Fasting Tracker also leads on update cadence (every 4 days vs every 9 days). On price, ads, 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. Fasting Tracker asks for nothing beyond the download.

Fasting Tracker ships an update every 4 days, 16 every 9 days. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fasting Tracker | 16 |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 6 MB |
| Requires iOS | 15.3 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Days Until LTD](https://appshunter.io/developer/1224814198) | [Heze Refresh Network Technology Co., Ltd](https://appshunter.io/developer/1690178793) |

## What reviewers say

### Fasting Tracker

[App page](https://appshunter.io/ios/app/fasting-tracker-fastingai/id6578452948)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Fasting Tracker free?

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

### Is 16 free?

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

### Do Fasting Tracker or 16 have ads?

Neither Fasting Tracker nor 16 shows ads.

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

Fasting Tracker ships an update every 4 days, and 16 every 9 days. Most recently, Fasting Tracker was updated on October 6, 2026 and 16 on October 24, 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.*