# OpenBook vs dynaimic

The clearest difference is ads: dynaimic at none against OpenBook's shown. OpenBook's advantage is iOS requirement (15.5 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

OpenBook ships an update every 2 weeks, dynaimic every 3 weeks. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | OpenBook | dynaimic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 55 MB | 78 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [OpenArcX Pty Ltd](https://appshunter.io/developer/1870700465) | [Burak Ozaslan](https://appshunter.io/developer/1891727368) |

## 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 |


### dynaimic

[App page](https://appshunter.io/ios/app/dynaimic-ai-workout-planner/id6761840180)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dynaimic Pro | $6.99 | per month |
| dynaimic Pro — Annual | $39.99 | per year |


## Frequently asked questions

### Is OpenBook free?

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

### Is dynaimic free?

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

### Do OpenBook or dynaimic have ads?

OpenBook shows ads; dynaimic does not.

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

OpenBook ships an update every 2 weeks, and dynaimic every 3 weeks. Most recently, OpenBook was updated on September 29, 2026 and dynaimic on October 7, 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.*