# Window vs Fastin

The clearest difference is monetization model: Window at freemium against Fastin's subscription. Window also leads on device support (4 vs 2) and iOS requirement (14.0 vs 16.6). Fastin's advantage is rating (4.8 vs 4.5) and review sentiment (33% vs 22%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Window sells 16 in-app purchases, starting at $0.49 per year and Fastin sells 10 in-app purchases, starting at $4.49 per 7 days. Whichever you choose, the download price is not the number that matters.

Fastin holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 11K and 10K respectively. Written reviews point the same way: 22% of Window's written reviews are positive against 33% of Fastin's.

Window ships an update monthly, Fastin every 3 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | Window | Fastin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (11K ratings)](https://appshunter.io/ios/app/window-intermittent-fasting/id1112765909/reviews) | **[4.8 (10K ratings)](https://appshunter.io/ios/app/fastin-intermittent-fasting/id1526416889/reviews)** |
| Number of ratings | **11K** | 10K |
| Positive reviews | 22.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Freemium** | Subscription |
| Size | 131 MB | 243 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 17+ | 17+ |
| Developer | [Mosaic S.r.l.](https://appshunter.io/developer/570748343) | [Bongmi Global Group](https://appshunter.io/developer/1526416891) |

## What reviewers say

### Window

[App page](https://appshunter.io/ios/app/window-intermittent-fasting/id1112765909)

This app helps you adopt an intermittent fasting lifestyle with science-based guidance and personalized recommendations. Track your fasting and eating periods, monitor weight loss goals, and stay hydrated. Access expert insights and challenges to build healthier habits.

**Highlights:** Fasting timer, Weight journal, Water tracker, Personalized fasting programs, Meal plans, Healthy challenges

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

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Window Premium (1 Year) | $0.49 | per year |
| Window Pro Weekly | $4.99 | per 7 days |
| Window Pro Weekly | $4.99 | per 7 days |
| Window Premium (1 Year) | $11.99 | per year |
| Window Premium (1 Month) | $14.99 | per month |
| Window Premium (3 Months) | $19.99 | per 3 months |
| Window Premium (1 Year) | $24.99 | per year |
| Window Premium (1 Year) | $39.99 | per year |
| Window Premium (1 Year) | $49.99 | per year |
| Window Premium (1 Year) | $49.99 | per year |
| Window Premium (1 Year) | $54.99 | per year |
| Window Premium (1 Year) | $59.99 | per year |
| Window Premium (1 Year) | $69.99 | per year |
| Window Premium (1 Year) | $79.99 | per year |
| Window Premium (1 Year) | $89.99 | per year |
| Window Premium (1 Year) | $99.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 📊 Helpful data tracking
- 🔍 Comprehensive features
- 👍 Flexible fasting options
- 💪 Motivating for fasting

**What reviewers complain about**

- 🐛 Sync issues across devices
- 🕰️ Inconsistent time tracking
- 💰 Expensive subscription
- 🔍 Confusing interface changes
- 🔧 Unreliable app functionality

**Reported bugs**

- Fasting times not accurately recorded
- Data loss and reset issues
- Subscription management problems
- Frequent app crashes and freezes
- Notifications not working as expected

**Requested features**

- Ability to edit fasting/eating times
- Integration with fitness trackers
- More detailed data analysis and reporting
- Customizable fasting plans and reminders
- Better support for longer fasting periods


### Fastin

[App page](https://appshunter.io/ios/app/fastin-intermittent-fasting/id1526416889)

This app guides you through intermittent fasting for weight loss and improved health. It offers personalized plans, tracking tools for food, weight, water, sleep, and activity, along with educational courses on fasting and nutrition. Visualize your progress with detailed statistics to stay motivated on your journey.

**Highlights:** Personalized fasting plans, Food, weight, water, sleep, and activity tracking, Fasting and nutrition courses, Progress statistics and charts, Step-by-step fasting guidance, Meal journal for mindful eating

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastingPrime1Weekly | $4.49 | per 7 days |
| PrimeWeekly | $6.99 | per 7 days |
| Fasting Prime | $6.99 | per 7 days |
| PrimeMonthly | $9.99 | per month |
| PrimeWeekly | $9.99 | per 7 days |
| Fasting Prime | $9.99 | per month |
| PrimeQuarterly | $19.99 | per 3 months |
| Fasting Prime | $29.99 | per year |
| PrimeQuarterly | $29.99 | per 3 months |
| PrimeYearly | $49.99 | per year |

**What reviewers like**

- ⭐ Excellent app
- 👍 Easy to use
- 🔍 Helpful for weight loss
- 🔍 Motivational
- 🔍 Informative

**What reviewers complain about**

- 💰 Paid subscription required
- 🔍 Limited food database
- 🔍 Inaccurate calorie tracking
- 🔍 Confusing or unintuitive interface
- 🐛 Bugs and glitches

**Reported bugs**

- Fasting timer resets unexpectedly
- App crashes or freezes
- Sync and login issues
- Inability to edit past fasts

**Requested features**

- Ability to scan barcodes for nutrition info
- More recipes and meal planning options
- Integration with fitness trackers
- Customizable fasting schedules
- Better data tracking and analysis


## Frequently asked questions

### Is Window free?

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

### Is Fastin free?

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

### Which has better reviews, Window or Fastin?

Fastin is rated higher. Window averages 4.5 out of 5 from 11K ratings, while Fastin averages 4.8 from 10K ratings.

### Do Window or Fastin have ads?

Neither Window nor Fastin shows ads.

### Which is updated more often, Window or Fastin?

Window ships an update monthly, and Fastin every 3 weeks. Most recently, Window was updated on October 30, 2026 and Fastin on October 30, 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.*