# OpenBook vs SoleDust

The clearest difference is price: OpenBook at Free against SoleDust's $1.99. OpenBook also leads on iOS requirement (15.5 vs 26.2). SoleDust's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

OpenBook is free to download; SoleDust costs $1.99 up front. OpenBook sells 2 in-app purchases, starting at $3.99 per month. SoleDust asks for nothing beyond the download.

OpenBook ships an update every 2 weeks, SoleDust every 3 days. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | OpenBook | SoleDust |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 55 MB | 75 MB |
| Requires iOS | **15.5** | 26.2 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [OpenArcX Pty Ltd](https://appshunter.io/developer/1870700465) | [Peter Olofsson](https://appshunter.io/developer/1878414150) |

## What reviewers say

### 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 |


### SoleDust

[App page](https://appshunter.io/ios/app/soledust/id6759395221)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is OpenBook free?

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

### Is SoleDust free?

SoleDust costs $1.99, with no in-app purchases.

### Do OpenBook or SoleDust have ads?

OpenBook shows ads; SoleDust does not.

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

OpenBook ships an update every 2 weeks, and SoleDust every 3 days. Most recently, OpenBook was updated on September 29, 2026 and SoleDust on October 13, 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.*