# Simply Fast vs DietSensor Keto

The clearest difference is price: DietSensor Keto at Free against Simply Fast's $0.99. DietSensor Keto also leads on rating (5.0 vs 4.5) and ratings volume (11 vs 2). Simply Fast's advantage is in-app purchases (none vs 9) and review sentiment (100% vs 75%). On update cadence, ads and device support there is nothing between them.

DietSensor Keto is free to download; Simply Fast costs $0.99 up front. DietSensor Keto sells 7 in-app purchases, starting at $29.99 per 3 months. Simply Fast asks for nothing beyond the download.

DietSensor Keto holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: DietSensor Keto has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of Simply Fast's written reviews are positive against 75% of DietSensor Keto's, so the app with the better star average is not the one people write more warmly about.

Simply Fast ships an update every 2 months, DietSensor Keto every 3 months. The most recent releases landed on September 22, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Simply Fast | DietSensor Keto |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/simply-fast/id1463942932/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/dietsensor-keto/id6444884975/reviews)** |
| Number of ratings | 2 | **11** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 397 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Mpathy Tech](https://appshunter.io/developer/1463942931) | [DietSensor, Inc.](https://appshunter.io/developer/1101290387) |

## What reviewers say

### Simply Fast

[App page](https://appshunter.io/ios/app/simply-fast/id1463942932)

This minimalist app helps you achieve time-restricted fasting goals with a simple, intuitive interface. Configure fasting start times and durations, and receive timely notifications for your fasting and eating windows. No account or sign-in is required.

**Highlights:** Simple and easy-to-use design, Customizable fasting start times, Adjustable fasting durations (12-23 hours), Fasting and eating window notifications, No sign-in or account required, Privacy-focused, no data collection

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

**In-app purchases:** none


### DietSensor Keto

[App page](https://appshunter.io/ios/app/dietsensor-keto/id6444884975)

Achieve ketosis and sustainable weight loss with this comprehensive keto diet app. It guides you through understanding nutrition science, managing hormones, and adopting a low-carb lifestyle with personalized meal suggestions and recipes.

**Highlights:** Achieve ketosis within hours, Maintain ketosis and weight loss, Adopt sustainable low-carb habits, Understand nutrition science for keto, Visualize glucose/insulin impact, Personalized meal suggestions and recipes, Food database with barcode and voice control

**In-app purchases (7)**

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


## Frequently asked questions

### Is Simply Fast free?

Simply Fast costs $0.99, with no in-app purchases.

### Is DietSensor Keto free?

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

### Which has better reviews, Simply Fast or DietSensor Keto?

DietSensor Keto is rated higher. Simply Fast averages 4.5 out of 5 from 2 ratings, while DietSensor Keto averages 5.0 from 11 ratings.

### Do Simply Fast or DietSensor Keto have ads?

Neither Simply Fast nor DietSensor Keto shows ads.

### Which is updated more often, Simply Fast or DietSensor Keto?

Simply Fast ships an update every 2 months, and DietSensor Keto every 3 months. Most recently, Simply Fast was updated on September 22, 2026 and DietSensor Keto on October 7, 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.*