# 16 vs FastMate

The clearest difference is in-app purchases: FastMate at none against 16's 3. 16's advantage is ads (none vs shown) and update cadence (every 9 days vs every 5 months). On price, 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. FastMate asks for nothing beyond the download.

16 ships an update every 9 days, FastMate every 5 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 16 | FastMate |
| --- | --- | --- |
| 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 | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 29 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Heze Refresh Network Technology Co., Ltd](https://appshunter.io/developer/1690178793) | [TensifyTech LLP](https://appshunter.io/developer/1773337081) |

## 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 |


### FastMate

[App page](https://appshunter.io/ios/app/fastmate-intermittent-fasting/id6743422473)

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

**In-app purchases:** none


## Frequently asked questions

### Is 16 free?

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

### Is FastMate free?

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

### Do 16 or FastMate have ads?

FastMate shows ads; 16 does not.

### Which is updated more often, 16 or FastMate?

16 ships an update every 9 days, and FastMate every 5 months. Most recently, 16 was updated on November 4, 2026 and FastMate on October 30, 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.*