# Just Fast vs Fasting Timer by TrainerDay

The clearest difference is ads: Fasting Timer by TrainerDay at none against Just Fast's shown. Fasting Timer by TrainerDay also leads on monetization model (free vs ad-supported). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Just Fast against 5.0 for Fasting Timer by TrainerDay. Both are backed by a comparable volume of ratings — 7 and 12 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | Just Fast | Fasting Timer by TrainerDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/just-fast-fasting-timer/id6752963711/reviews) | [5.0 (12 ratings)](https://appshunter.io/ios/app/fasting-timer-by-trainerday/id6758466061/reviews) |
| Number of ratings | 7 | **12** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Monetization | Ad-supported | **Free** |
| Size | 47 MB | 30 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Adrian Cabala](https://appshunter.io/developer/1841708643) | [TrainerDay Inc](https://appshunter.io/developer/1816950052) |

## 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


### Fasting Timer by TrainerDay

[App page](https://appshunter.io/ios/app/fasting-timer-by-trainerday/id6758466061)

This app simplifies intermittent fasting with a one-tap start and customizable durations. Track your progress visually and review your fasting history. It's designed for easy habit building without complex features.

**Highlights:** One-tap fast start, Customizable fasting durations, Flexible start times, Visual progress tracking, Fasting history, Shareable results

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

**In-app purchases:** none


## Frequently asked questions

### Is Just Fast free?

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

### Is Fasting Timer by TrainerDay free?

Fasting Timer by TrainerDay is free to download, with no in-app purchases.

### Which has better reviews, Just Fast or Fasting Timer by TrainerDay?

Just Fast and Fasting Timer by TrainerDay are both rated 5.0 out of 5 on the App Store, from 7 and 12 ratings respectively.

### Do Just Fast or Fasting Timer by TrainerDay have ads?

Just Fast shows ads; Fasting Timer by TrainerDay does not.

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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.*