# DoFast vs SOL

The clearest difference is update cadence: SOL at fortnightly against DoFast's every 2 months. 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.

DoFast ships an update every 2 months, SOL fortnightly. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | DoFast | SOL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 8 MB | 6 MB |
| Requires iOS | **15.0** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Igor Lenderman](https://appshunter.io/developer/1886154638) | [Danny Linsner](https://appshunter.io/developer/1888416267) |

## What reviewers say

### DoFast

[App page](https://appshunter.io/ios/app/dofast-intermittent-fasting/id6760772207)

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

**In-app purchases:** none


### SOL

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

**In-app purchases:** none


## Frequently asked questions

### Is DoFast free?

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

### Is SOL free?

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

### Do DoFast or SOL have ads?

Neither DoFast nor SOL shows ads.

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

DoFast ships an update every 2 months, and SOL fortnightly. Most recently, DoFast was updated on October 1, 2026 and SOL on October 6, 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.*