# SOL vs Vow Fasting

The clearest difference is in-app purchases: SOL at none against Vow Fasting's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Vow Fasting sells 2 in-app purchases, starting at $4.99 per month. SOL asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on October 6, 2026.

## The numbers

| Metric | SOL | Vow Fasting |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Size | 6 MB | 13 MB |
| Requires iOS | **16** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Danny Linsner](https://appshunter.io/developer/1888416267) | [FILIP LUCCA KEJSER DAMICI](https://appshunter.io/developer/6776396594) |

## What reviewers say

### SOL

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

**In-app purchases:** none


### Vow Fasting

[App page](https://appshunter.io/ios/app/vow-fasting/id6776396592)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vow Pro Monthly | $4.99 | per month |
| Vow Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is SOL free?

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

### Is Vow Fasting free?

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

### Do SOL or Vow Fasting have ads?

Neither SOL nor Vow Fasting shows ads.

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

SOL ships an update fortnightly, and Vow Fasting fortnightly. Most recently, SOL was updated on October 6, 2026 and Vow Fasting 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.*