# InterFasting vs FitLogOS

The clearest difference is in-app purchases: FitLogOS at none against InterFasting's 5. FitLogOS also leads on ads (none vs shown). InterFasting's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and update cadence there is nothing between them.

Both are free to download. InterFasting sells 5 in-app purchases, starting at $3.99 per month. FitLogOS asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 29, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | InterFasting | FitLogOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (359 ratings)](https://appshunter.io/ios/app/interfasting-fasting-tracker/id1467464443/reviews)** | — |
| Number of ratings | **359** | — |
| Positive reviews | 88.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Free with in-app purchases | — |
| Size | 99 MB | 3 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Liviet](https://appshunter.io/developer/1464827169) | [Taisuke Goto](https://appshunter.io/developer/1834029625) |

## What reviewers say

### InterFasting

[App page](https://appshunter.io/ios/app/interfasting-fasting-tracker/id1467464443)

This app helps users succeed with intermittent fasting through scientific and systematic management. It offers AI-powered schedule and calorie recommendations, a simple timer, and comprehensive tracking of fasting hours, meals, workouts, and water intake. Users can visualize progress and receive detailed reports to build healthy habits.

**Highlights:** AI fasting schedule recommendations, AI food calorie calculation, Intermittent fasting timer, Customizable fasting plans, All-in-one health tracking, Fasting analysis and reports, Home screen widget

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intermittent Fasting Monthly | $3.99 | per month |
| Intermittent Fasting Monthly | $6.99 | per month |
| Intermittent Fasting Annual | $12.99 | per year |
| Intermittent Fasting Annual | $34.99 | per year |
| Premium User | $12.99 | one-time |


### FitLogOS

[App page](https://appshunter.io/ios/app/fitlogos/id6781057580)

**In-app purchases:** none


## Frequently asked questions

### Is InterFasting free?

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

### Is FitLogOS free?

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

### Do InterFasting or FitLogOS have ads?

InterFasting shows ads; FitLogOS does not.

### Which is updated more often, InterFasting or FitLogOS?

InterFasting ships an update every 4 days, and FitLogOS every 4 days. Most recently, InterFasting was updated on October 29, 2026 and FitLogOS on October 5, 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.*