# Fast.io vs Selah Studio

The clearest difference is in-app purchases: Selah Studio at none against Fast.io's 1. Selah Studio also leads on iOS requirement (15.1 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fast.io sells 1 one-off in-app purchase. Selah Studio asks for nothing beyond the download.

Fast.io ships an update monthly, Selah Studio every 3 weeks. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Fast.io | Selah Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 23 MB | 86 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Sturm](https://appshunter.io/developer/416803387) | [Spotbee, Inc.](https://appshunter.io/developer/1465231993) |

## What reviewers say

### Fast.io

[App page](https://appshunter.io/ios/app/fastio-fasting-timer/id6755233993)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fast.io Pro | $6.99 | one-time |


### Selah Studio

[App page](https://appshunter.io/ios/app/selah-studio/id6780656976)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Fast.io free?

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

### Is Selah Studio free?

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

### Do Fast.io or Selah Studio have ads?

Neither Fast.io nor Selah Studio shows ads.

### Which is updated more often, Fast.io or Selah Studio?

Fast.io ships an update monthly, and Selah Studio every 3 weeks. Most recently, Fast.io was updated on September 21, 2026 and Selah Studio on September 19, 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.*