# SOL vs StayFasted

The clearest difference is in-app purchases: SOL at none against StayFasted's 3. SOL also leads on iOS requirement (16 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. StayFasted sells 3 in-app purchases, starting at $5.99 per month. SOL asks for nothing beyond the download.

SOL ships an update fortnightly, StayFasted every 3 weeks. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SOL | StayFasted |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 6 MB | 9 MB |
| Requires iOS | **16** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Danny Linsner](https://appshunter.io/developer/1888416267) | [Jason Duval](https://appshunter.io/developer/1844897503) |

## What reviewers say

### SOL

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

**In-app purchases:** none


### StayFasted

[App page](https://appshunter.io/ios/app/stayfasted-fasting-tracker/id6761391775)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Annual | $39.99 | per year |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is SOL free?

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

### Is StayFasted free?

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

### Do SOL or StayFasted have ads?

Neither SOL nor StayFasted shows ads.

### Which is updated more often, SOL or StayFasted?

SOL ships an update fortnightly, and StayFasted every 3 weeks. Most recently, SOL was updated on October 6, 2026 and StayFasted 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.*