# SOL vs FastLyfe

The clearest difference is in-app purchases: SOL at none against FastLyfe's 3. SOL also leads on update cadence (fortnightly vs every 6 weeks). FastLyfe's advantage is iOS requirement (13.0 vs 16). On price, ads and device support there is nothing between them.

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

SOL ships an update fortnightly, FastLyfe every 6 weeks. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | SOL | FastLyfe |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Size | 6 MB | 31 MB |
| Requires iOS | 16 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Danny Linsner](https://appshunter.io/developer/1888416267) | [Cayden Williams](https://appshunter.io/developer/1870369963) |

## What reviewers say

### SOL

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

**In-app purchases:** none


### FastLyfe

[App page](https://appshunter.io/ios/app/fastlyfe-fasting-tracker/id6762158215)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $5.99 | per month |
| Yearly | $16.99 | per year |
| Lifetime Pro | $29.99 | one-time |


## Frequently asked questions

### Is SOL free?

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

### Is FastLyfe free?

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

### Do SOL or FastLyfe have ads?

Neither SOL nor FastLyfe shows ads.

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

SOL ships an update fortnightly, and FastLyfe every 6 weeks. Most recently, SOL was updated on September 22, 2026 and FastLyfe on September 19, 2026.

---

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