# Fast AI vs DietSensor Fasting

The clearest difference is review sentiment: DietSensor Fasting at 50% against Fast AI's 7%. DietSensor Fasting also leads on rating (5.0 vs 4.3). Fast AI's advantage is update cadence (every 2 weeks vs every 3 months) and ratings volume (120 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Fast AI sells 5 in-app purchases, starting at $5.99 per 7 days and DietSensor Fasting sells 9 in-app purchases, starting at $29.99 per 3 months. Whichever you choose, the download price is not the number that matters.

DietSensor Fasting holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Fast AI has 120 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 7% of Fast AI's written reviews are positive against 50% of DietSensor Fasting's.

Fast AI ships an update every 2 weeks, DietSensor Fasting every 3 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Fast AI | DietSensor Fasting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (120 ratings)](https://appshunter.io/ios/app/fast-ai-intermittent-fasting/id1629661646/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/dietsensor-fasting/id6444884321/reviews)** |
| Number of ratings | **120** | 5 |
| Positive reviews | 7.1% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 101 MB | 397 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kiryl Salavei](https://appshunter.io/developer/1033680093) | [DietSensor, Inc.](https://appshunter.io/developer/1101290387) |

## What reviewers say

### Fast AI

[App page](https://appshunter.io/ios/app/fast-ai-intermittent-fasting/id1629661646)

This app helps users achieve weight loss and improve well-being through intermittent fasting. It provides tracking, scheduling, and detailed analytics to guide users through various fasting plans. The app aims to make fasting a natural and effective part of a healthy lifestyle.

**Highlights:** Intermittent fasting tracker, Weight monitoring, Fasting and food window notifications, Detailed analytics, Multiple fasting schemes (e.g., 16/8), Fasting schedule, Apple Health weight sync

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple intermittent fasting | $5.99 | per 7 days |
| Intermittent Fasting 1 Month | $12.99 | per month |
| Personal Fast Program 3 Month | $19.99 | per 3 months |
| Intermittent Fasting + Tracker | $35.99 | per year |
| Intermittent Fasting Annual | $49.99 | per year |


### DietSensor Fasting

[App page](https://appshunter.io/ios/app/dietsensor-fasting/id6444884321)

This app guides users through intermittent fasting for weight loss and health improvement. It helps gradually adapt to fasting patterns, make healthy food choices, and track macronutrients. Features include meal planning, expert articles, and integration with health apps.

**Highlights:** Gradual fasting pattern adaptation, Macronutrient goal setting, Smart meal generator and recipes, Glucose/insulin impact tracking, Integration with Apple Health, Expert articles and dietician chats

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 months Premium | $29.99 | per 3 months |
| 1 year Premium | $39.99 | per year |
| Premium yearly | $39.99 | per month |
| 1 year Premium | $49.99 | per year |
| 1 year Premium | $49.99 | per year |
| 1 year Premium | $49.99 | per year |
| Premium 3 Months | $59.99 | per 3 months |
| Premium yearly | $99.99 | per year |
| Premium 1 year | $99.99 | per year |


## Frequently asked questions

### Is Fast AI free?

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

### Is DietSensor Fasting free?

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

### Which has better reviews, Fast AI or DietSensor Fasting?

DietSensor Fasting is rated higher. Fast AI averages 4.3 out of 5 from 120 ratings, while DietSensor Fasting averages 5.0 from 5 ratings.

### Do Fast AI or DietSensor Fasting have ads?

Neither Fast AI nor DietSensor Fasting shows ads.

### Which is updated more often, Fast AI or DietSensor Fasting?

Fast AI ships an update every 2 weeks, and DietSensor Fasting every 3 months. Most recently, Fast AI was updated on October 12, 2026 and DietSensor Fasting on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*