# Empty Fasting vs 16

The clearest difference is in-app purchases: Empty Fasting at none against 16's 3. Empty Fasting also leads on update cadence (every 3 days vs every 9 days). 16's advantage is iOS requirement (15.0 vs 17.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. 16 sells 3 in-app purchases, starting at $1.99 per month. Empty Fasting asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Empty Fasting against 4.7 for 16. Both are backed by a comparable volume of ratings — 83 and 54 respectively. Written reviews are what separate them: 83% of Empty Fasting's written reviews are positive against 78% of 16's.

Empty Fasting ships an update every 3 days, 16 every 9 days. Both last shipped on November 4, 2026.

## The numbers

| Metric | Empty Fasting | 16 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (83 ratings)](https://appshunter.io/ios/app/empty-fasting/id6475213946/reviews) | **[4.7 (54 ratings)](https://appshunter.io/ios/app/168-intermittent-fasting/id6708227128/reviews)** |
| Number of ratings | **83** | 54 |
| Positive reviews | **83.3% of reviews** | 77.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 169 MB | 6 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Light Nudge](https://appshunter.io/developer/1731016560) | [Heze Refresh Network Technology Co., Ltd](https://appshunter.io/developer/1690178793) |

## What reviewers say

### Empty Fasting

[App page](https://appshunter.io/ios/app/empty-fasting/id6475213946)

This app helps users focus on a single fasting period at a time, offering both overnight and daytime schedules. It provides customizable themes and icons, home screen widgets, and tracks fasting streaks and trends with encouraging messages.

**Highlights:** Single fast focus, Home screen widgets, Overnight and daytime schedules, Customizable themes and icons, Streak and trend statistics, Encouragement during fasts

**In-app purchases:** none

**What reviewers like**

- ✨ Beautiful UI design
- 👍 Simple and focused functionality
- 🚀 Snappy and well-thought-out UI
- 💎 Clean and minimal aesthetic
- ✅ Does what it's made for

**What reviewers complain about**

- ❌ Lacks custom fasting length
- ❌ Can’t personalize app for ADF
- ❌ Lacks Apple Health integration
- ❌ Inability to edit start time
- ❌ Fasts can’t be started at any time

**Reported bugs**

- Fast reminders still sent even if the fasting session is currently active.

**Requested features**

- Custom fasting length (days/hours)
- More options for ADF
- Apple Health integration
- Ability to edit start time of a running timer
- Set multiple start fast reminders


### 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 Empty Fasting free?

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

### Is 16 free?

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

### Which has better reviews, Empty Fasting or 16?

16 is rated higher. Empty Fasting averages 4.6 out of 5 from 83 ratings, while 16 averages 4.7 from 54 ratings.

### Do Empty Fasting or 16 have ads?

Neither Empty Fasting nor 16 shows ads.

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

Empty Fasting ships an update every 3 days, and 16 every 9 days. Most recently, Empty Fasting was updated on November 4, 2026 and 16 on November 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.*