# Fast.io vs Hard 75

The clearest difference is update cadence: Fast.io at monthly against Hard 75's every 4 months. Hard 75's advantage is iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Fast.io sells 1 one-off in-app purchase and Hard 75 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Fast.io ships an update monthly, Hard 75 every 4 months. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Fast.io | Hard 75 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 23 MB | 54 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) | [Glenn Francis](https://appshunter.io/developer/1875693789) |

## 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 |


### Hard 75

[App page](https://appshunter.io/ios/app/hard-75-challenge-tracker/id6758966238)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $9.99 | one-time |


## Frequently asked questions

### Is Fast.io free?

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

### Is Hard 75 free?

Hard 75 is free to download, with in-app purchases available.

### Do Fast.io or Hard 75 have ads?

Neither Fast.io nor Hard 75 shows ads.

### Which is updated more often, Fast.io or Hard 75?

Fast.io ships an update monthly, and Hard 75 every 4 months. Most recently, Fast.io was updated on September 21, 2026 and Hard 75 on September 20, 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.*