# Fast.io vs FastLine

The clearest difference is iOS requirement: FastLine at 17.0 against Fast.io's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Fast.io sells 1 one-off in-app purchase and FastLine sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Fast.io | FastLine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 23 MB | 13 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Stefan Sturm](https://appshunter.io/developer/416803387) | [Moaath Othman](https://appshunter.io/developer/866641649) |

## 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 |


### FastLine

[App page](https://appshunter.io/ios/app/fastline-fasting-timer/id6780896658)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| FastLine Pro | $19.99 | per year |
| FastLine Pro | $29.99 | one-time |


## Frequently asked questions

### Is Fast.io free?

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

### Is FastLine free?

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

### Do Fast.io or FastLine have ads?

Neither Fast.io nor FastLine shows ads.

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

Fast.io ships an update monthly, and FastLine monthly. Most recently, Fast.io was updated on September 21, 2026 and FastLine on September 10, 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.*