# SOL vs Fasting Window

The clearest difference is update cadence: SOL at fortnightly against Fasting Window's every 4 months. Fasting Window's advantage is iOS requirement (13.0 vs 16). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SOL ships an update fortnightly, Fasting Window every 4 months. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SOL | Fasting Window |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 6 MB | 20 MB |
| Requires iOS | 16 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Danny Linsner](https://appshunter.io/developer/1888416267) | [HeungYeol Kim](https://appshunter.io/developer/1878087341) |

## What reviewers say

### SOL

[App page](https://appshunter.io/ios/app/sol-fasting-timer-and-tracker/id6761254200)

**In-app purchases:** none


### Fasting Window

[App page](https://appshunter.io/ios/app/fasting-window-if-timer/id6774622599)

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

**In-app purchases:** none


## Frequently asked questions

### Is SOL free?

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

### Is Fasting Window free?

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

### Do SOL or Fasting Window have ads?

Neither SOL nor Fasting Window shows ads.

### Which is updated more often, SOL or Fasting Window?

SOL ships an update fortnightly, and Fasting Window every 4 months. Most recently, SOL was updated on October 6, 2026 and Fasting Window on October 13, 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.*