# Just Fasting vs Abstia

The clearest difference is rating: Abstia at 5.0 against Just Fasting's 4.0. Abstia also leads on iOS requirement (16.4 vs 26.4). Just Fasting's advantage is update cadence (every 2 days vs every 6 weeks). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Abstia holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Just Fasting ships an update every 2 days, Abstia every 6 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Just Fasting | Abstia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/just-fasting/id6761426623/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abstia/id6797053836/reviews)** |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 2 MB | 67 MB |
| Requires iOS | 26.4 | **16.4** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Matthew Clark](https://appshunter.io/developer/1797183728) | [Abstia, LLC](https://appshunter.io/developer/6797053838) |

## What reviewers say

### Just Fasting

[App page](https://appshunter.io/ios/app/just-fasting/id6761426623)

This app helps you track your fasting periods with a simple, uncluttered interface. Easily start custom fasts of varying lengths and monitor your progress with detailed statistics. It's designed to be unobtrusive and straightforward for your intermittent fasting journey.

**Highlights:** Customizable fast durations (hours and days), One-tap start for common fasts, Visual countdown and progress arc, Detailed fasting statistics, Streak tracking, Remember last fast length

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

**In-app purchases:** none


### Abstia

[App page](https://appshunter.io/ios/app/abstia/id6797053836)

This app provides a privacy-focused intermittent fasting tracker with real-time metabolic stage tracking and an AI coach. It helps users understand their body's physiological changes during fasting and offers personalized advice based on their history.

**Highlights:** Real-time metabolic stage tracking, Fasting timer and custom schedules, Personalized AI fasting coach, Biofeedback and health logging, Calendar heatmap and streaks, Widgets and Apple Watch support, Offline-first and private

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Just Fasting free?

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

### Is Abstia free?

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

### Which has better reviews, Just Fasting or Abstia?

Abstia is rated higher. Just Fasting averages 4.0 out of 5 from 1 ratings, while Abstia averages 5.0 from 2 ratings.

### Do Just Fasting or Abstia have ads?

Neither Just Fasting nor Abstia shows ads.

### Which is updated more often, Just Fasting or Abstia?

Just Fasting ships an update every 2 days, and Abstia every 6 weeks. Most recently, Just Fasting was updated on October 31, 2026 and Abstia on October 31, 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.*