# ONE vs Fasting Well

The clearest difference is in-app purchases: Fasting Well at none against ONE's 6. ONE's advantage is update cadence (every 4 weeks vs every 3 months) and device support (4 vs 2). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. ONE sells 6 in-app purchases, starting at $2.99 per 7 days. Fasting Well asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ONE against 5.0 for Fasting Well. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ONE ships an update every 4 weeks, Fasting Well every 3 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ONE | Fasting Well |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/oneintermittent-fasting/id6759722688/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/fasting-well-if-timer/id6772277372/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 3 months |
| Monetization | Freemium | Freemium |
| Size | 49 MB | 45 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Create Rush](https://appshunter.io/developer/1880351509) | [Generalizable](https://appshunter.io/developer/1847351234) |

## What reviewers say

### ONE

[App page](https://appshunter.io/ios/app/oneintermittent-fasting/id6759722688)

This app simplifies intermittent fasting with a one-tap timer and progress tracker. It guides users through fasting stages, offers various plans, and provides insights into body changes. The focus is on building consistent habits without unnecessary complexity.

**Highlights:** One-tap fasting timer, Live fasting stage tracking, Multiple fasting plan options, Daily streak tracking, Weight and water tracking, AI-powered progress summaries, Offline functionality

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Weekly | $2.99 | per 7 days |
| Premium Weekly | $4.99 | per 7 days |
| Standard Monthly | $4.99 | per month |
| Premium Monthly | $9.99 | per month |
| Standard Yearly | $49.99 | per year |
| Premium Yearly | $99.99 | per year |


### Fasting Well

[App page](https://appshunter.io/ios/app/fasting-well-if-timer/id6772277372)

Track your intermittent fasting journey with science-backed insights. Monitor your progress through different metabolic stages and view your history with a visual heatmap. Offers built-in plans and detailed scientific articles.

**Highlights:** Stage-aware fasting progress visualization, Live timer with customizable ring, Six built-in fasting plans, Journal and weekly progress charts, Science-backed articles on fasting, Calendar heatmap of activity, Privacy-first, on-device data storage

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

**In-app purchases:** none


## Frequently asked questions

### Is ONE free?

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

### Is Fasting Well free?

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

### Which has better reviews, ONE or Fasting Well?

ONE and Fasting Well are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do ONE or Fasting Well have ads?

Neither ONE nor Fasting Well shows ads.

### Which is updated more often, ONE or Fasting Well?

ONE ships an update every 4 weeks, and Fasting Well every 3 months. Most recently, ONE was updated on October 24, 2026 and Fasting Well on October 13, 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.*