# 16 vs Fastly

16 and Fastly both sit at 4.7 stars, but that hides the real split: 94% of Fastly's written reviews are positive against 78% of 16's. 16's advantage is iOS requirement (15.0 vs 17.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. 16 sells 3 in-app purchases, starting at $1.99 per month and Fastly sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for 16 against 4.8 for Fastly. Both are backed by a comparable volume of ratings — 54 and 96 respectively. Written reviews are what separate them: 78% of 16's written reviews are positive against 94% of Fastly's.

16 ships an update every 9 days, Fastly every 10 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 16 | Fastly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (54 ratings)](https://appshunter.io/ios/app/168-intermittent-fasting/id6708227128/reviews) | **[4.8 (96 ratings)](https://appshunter.io/ios/app/fastly-clean-fasting-timer/id6756632894/reviews)** |
| Number of ratings | 54 | **96** |
| Positive reviews | 77.8% of reviews | **94.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 9 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Heze Refresh Network Technology Co., Ltd](https://appshunter.io/developer/1690178793) | [Collweb LLC](https://appshunter.io/developer/1822634213) |

## 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 |


### Fastly

[App page](https://appshunter.io/ios/app/fastly-clean-fasting-timer/id6756632894)

This app provides a clean and distraction-free timer for intermittent fasting. It tracks your fasting periods in real-time, offers various popular fasting plans, and automatically monitors fasting phases like fat burning and ketosis. View your history with clear statistics and receive smart reminders.

**Highlights:** Clean fasting timer with real-time tracking, Multiple intermittent fasting plans, Automatic fasting phase tracking, Fasting history with statistics, Smart reminders for goals, Minimalist interface, Dark mode support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $1.99 | one-time |
| Lunch | $4.99 | one-time |
| Become a Supporter | $4.99 | one-time |
| Dinner | $9.99 | one-time |


## Frequently asked questions

### Is 16 free?

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

### Is Fastly free?

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

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

Fastly is rated higher. 16 averages 4.7 out of 5 from 54 ratings, while Fastly averages 4.8 from 96 ratings.

### Do 16 or Fastly have ads?

Neither 16 nor Fastly shows ads.

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

16 ships an update every 9 days, and Fastly every 10 days. Most recently, 16 was updated on October 24, 2026 and Fastly on October 25, 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.*