# InterFasting vs Diet Diary DaDa

The clearest difference is in-app purchases: Diet Diary DaDa at none against InterFasting's 3. InterFasting's advantage is update cadence (every 2 days vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. InterFasting sells 3 in-app purchases, starting at $3.99 per month. Diet Diary DaDa asks for nothing beyond the download.

InterFasting ships an update every 2 days, Diet Diary DaDa every 3 weeks. The most recent releases landed on September 22, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | InterFasting | Diet Diary DaDa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (267 ratings)](https://appshunter.io/ios/app/interfasting-fasting-timer/id1467464443/reviews)** | — |
| Number of ratings | **267** | — |
| Positive reviews | 88.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 85 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kim Yunhoo](https://appshunter.io/developer/1464827169) | [Seonggon Sim](https://appshunter.io/developer/1565259950) |

## What reviewers say

### InterFasting

[App page](https://appshunter.io/ios/app/interfasting-fasting-timer/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 (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 month | $3.99 | per month |
| Gandan Premium Annual | $12.99 | per year |
| Premium User | $12.99 | one-time |


### Diet Diary DaDa

[App page](https://appshunter.io/ios/app/diet-diary-dada-weight-log/id6499539149)

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

**In-app purchases:** none


## Frequently asked questions

### Is InterFasting free?

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

### Is Diet Diary DaDa free?

Diet Diary DaDa is free to download, with no in-app purchases.

### Do InterFasting or Diet Diary DaDa have ads?

Both InterFasting and Diet Diary DaDa show ads.

### Which is updated more often, InterFasting or Diet Diary DaDa?

InterFasting ships an update every 2 days, and Diet Diary DaDa every 3 weeks. Most recently, InterFasting was updated on September 22, 2026 and Diet Diary DaDa on September 17, 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.*