# GainBlocks vs OpenBook

GainBlocks and OpenBook are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. GainBlocks sells 2 in-app purchases, starting at $6.99 per month and OpenBook sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

GainBlocks ships an update every 9 days, OpenBook every 2 weeks. The most recent releases landed on August 30, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | GainBlocks | OpenBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 57 MB | 55 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Mike Hendriks](https://appshunter.io/developer/1850111344) | [OpenArcX Pty Ltd](https://appshunter.io/developer/1870700465) |

## What reviewers say

### GainBlocks

[App page](https://appshunter.io/ios/app/gainblocks/id6756027419)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GainBlocks Monthly | $6.99 | per month |
| GainBlocks Annual | $44.99 | per year |


### OpenBook

[App page](https://appshunter.io/ios/app/openbook-workout-tracker/id6758069172)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenBook Full Access - Monthly | $3.99 | per month |
| OpenBook Full Access - Yearly | $29.99 | per year |


## Frequently asked questions

### Is GainBlocks free?

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

### Is OpenBook free?

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

### Do GainBlocks or OpenBook have ads?

Both GainBlocks and OpenBook show ads.

### Which is updated more often, GainBlocks or OpenBook?

GainBlocks ships an update every 9 days, and OpenBook every 2 weeks. Most recently, GainBlocks was updated on August 30, 2026 and OpenBook 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.*