# Hup! Training Assistant vs OpenBook

The clearest difference is ads: Hup! Training Assistant at none against OpenBook's shown. OpenBook's advantage is iOS requirement (15.5 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Hup! Training Assistant sells 2 in-app purchases, starting at $4.99 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.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Hup! Training Assistant | OpenBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 29 MB | 55 MB |
| Requires iOS | 26.0 | **15.5** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Alamak OY](https://appshunter.io/developer/1456476177) | [OpenArcX Pty Ltd](https://appshunter.io/developer/1870700465) |

## What reviewers say

### Hup! Training Assistant

[App page](https://appshunter.io/ios/app/hup-training-assistant/id6737717458)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $4.99 | per month |
| Yearly Membership | $49.99 | 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 Hup! Training Assistant free?

Hup! Training Assistant is free to download, with in-app purchases available.

### Is OpenBook free?

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

### Do Hup! Training Assistant or OpenBook have ads?

OpenBook shows ads; Hup! Training Assistant does not.

### Which is updated more often, Hup! Training Assistant or OpenBook?

Hup! Training Assistant ships an update every 2 weeks, and OpenBook every 2 weeks. Most recently, Hup! Training Assistant was updated on October 2, 2026 and OpenBook on September 29, 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.*