# 16 vs FastingCat

The clearest difference is review sentiment: FastingCat at 100% against 16's 78%. FastingCat also leads on rating (4.9 vs 4.7). 16's advantage is iOS requirement (15.0 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. 16 sells 3 in-app purchases, starting at $1.99 per month and FastingCat sells 10 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

FastingCat holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 54 and 56 respectively. Written reviews point the same way: 78% of 16's written reviews are positive against 100% of FastingCat's.

16 ships an update every 9 days, FastingCat every 6 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 16 | FastingCat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (54 ratings)](https://appshunter.io/ios/app/168-intermittent-fasting/id6708227128/reviews) | **[4.9 (56 ratings)](https://appshunter.io/ios/app/fastingcat-fast-tracker-if/id6748528990/reviews)** |
| Number of ratings | 54 | **56** |
| Positive reviews | 77.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 24 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Heze Refresh Network Technology Co., Ltd](https://appshunter.io/developer/1690178793) | [ProApps Solutions](https://appshunter.io/developer/1760776062) |

## 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 |


### FastingCat

[App page](https://appshunter.io/ios/app/fastingcat-fast-tracker-if/id6748528990)

Master intermittent fasting with a focused timer and science-backed tracking. Monitor your progress with detailed insights, charts, and smart notifications to stay motivated and in control of your fasting journey. Your privacy is prioritized with on-device data storage and no ads.

**Highlights:** Customizable fasting presets, Science-backed fasting zone tracking, Detailed progress charts, Flexible scheduling with grace days, Smart notifications, Seamless weight logging, On-device data privacy

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Donation (Cookie) | $0.99 | per month |
| Monthly Donation (Donut) | $2.49 | per month |
| Monthly Donation (Smoothie) | $4.99 | per month |
| Monthly Donation (Salad) | $7.99 | per month |
| Monthly Donation (Protein) | $9.99 | per month |
| One-time Donation (Coffee) | $1.99 | one-time |
| One-time Donation (Sandwich) | $4.99 | one-time |
| One-time Donation (Pizza) | $9.99 | one-time |
| One-time Donation (Groceries) | $24.99 | one-time |
| One-time Donation (Books) | $49.99 | one-time |


## Frequently asked questions

### Is 16 free?

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

### Is FastingCat free?

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

### Which has better reviews, 16 or FastingCat?

FastingCat is rated higher. 16 averages 4.7 out of 5 from 54 ratings, while FastingCat averages 4.9 from 56 ratings.

### Do 16 or FastingCat have ads?

Neither 16 nor FastingCat shows ads.

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

16 ships an update every 9 days, and FastingCat every 6 days. Most recently, 16 was updated on November 4, 2026 and FastingCat on November 5, 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.*