# Fasting Timer by TrainerDay vs Fastology

The clearest difference is iOS requirement: Fasting Timer by TrainerDay at 15.1 against Fastology's 17.0. 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 Fasting Timer by TrainerDay against 4.9 for Fastology. Both are backed by a comparable volume of ratings — 12 and 10 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | Fasting Timer by TrainerDay | Fastology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (12 ratings)](https://appshunter.io/ios/app/fasting-timer-by-trainerday/id6758466061/reviews)** | [4.9 (10 ratings)](https://appshunter.io/ios/app/fastology-fasting-tracker/id6761324779/reviews) |
| Number of ratings | **12** | 10 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | Free | Free |
| Size | 30 MB | 40 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [TrainerDay Inc](https://appshunter.io/developer/1816950052) | [SmallScale Works LLC](https://appshunter.io/developer/1888909483) |

## What reviewers say

### 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


### Fastology

[App page](https://appshunter.io/ios/app/fastology-fasting-tracker/id6761324779)

This app provides structured tracking for intermittent fasting, going beyond simple timers. It helps users follow specific fasting schedules with clear phase progress, build consistency through streaks, and manage a flexible weekly plan. Focuses on discipline and reducing guesswork for a clearer fasting experience.

**Highlights:** Track various fast types (16:8, OMAD, extended), Live phase-by-phase progress tracking, Build streaks from completed fasts, Flexible weekly fasting schedule, Review fasting history, Ask fasting questions with reviewed answers, Siri and Shortcuts integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Fasting Timer by TrainerDay free?

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

### Is Fastology free?

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

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

Fasting Timer by TrainerDay is rated higher. Fasting Timer by TrainerDay averages 5.0 out of 5 from 12 ratings, while Fastology averages 4.9 from 10 ratings.

### Do Fasting Timer by TrainerDay or Fastology have ads?

Neither Fasting Timer by TrainerDay nor Fastology shows ads.

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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.*