# Just Fast vs Fastly

The clearest difference is in-app purchases: Just Fast at none against Fastly's 4. Just Fast also leads on rating (5.0 vs 4.8) and iOS requirement (14.0 vs 17.6). Fastly's advantage is ads (none vs shown) and ratings volume (92 vs 7). On price, review sentiment and device support there is nothing between them.

Both are free to download. Fastly sells 4 one-off in-app purchases. Just Fast asks for nothing beyond the download.

Just Fast holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Fastly has 92 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 100% of Just Fast's written reviews are positive against 94% of Fastly's.

Just Fast ships an update every 3 weeks, Fastly every 10 days. The most recent releases landed on September 20, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Just Fast | Fastly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/just-fast-fasting-timer/id6752963711/reviews)** | [4.8 (92 ratings)](https://appshunter.io/ios/app/fastly-clean-fasting-timer/id6756632894/reviews) |
| Number of ratings | 7 | **92** |
| Positive reviews | **100.0% of reviews** | 94.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 47 MB | 9 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 17+ | 12+ |
| Developer | [Adrian Cabala](https://appshunter.io/developer/1841708643) | [Collweb LLC](https://appshunter.io/developer/1822634213) |

## What reviewers say

### Just Fast

[App page](https://appshunter.io/ios/app/just-fast-fasting-timer/id6752963711)

This app tracks both your fasting periods and your eating windows, offering a unique dual-countdown feature. It visualizes metabolic phases like fat burning and ketosis, supports various fasting methods, and provides insights into your progress. It's designed to be user-friendly and privacy-conscious, working entirely offline.

**Highlights:** Eating window countdown, Fasting phases visualization, Support for multiple fasting methods, Streak tracking with grace periods, Pattern insights, Weight and BMI tracking, Smart notifications, 100% offline functionality

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

**In-app purchases:** none


### 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 Just Fast free?

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

### Is Fastly free?

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

### Which has better reviews, Just Fast or Fastly?

Just Fast is rated higher. Just Fast averages 5.0 out of 5 from 7 ratings, while Fastly averages 4.8 from 92 ratings.

### Do Just Fast or Fastly have ads?

Just Fast shows ads; Fastly does not.

### Which is updated more often, Just Fast or Fastly?

Just Fast ships an update every 3 weeks, and Fastly every 10 days. Most recently, Just Fast was updated on September 20, 2026 and Fastly on September 23, 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.*