# Kunto Lite vs OpenBook

The clearest difference is in-app purchases: Kunto Lite at none against OpenBook's 2. Kunto Lite also leads on ads (none vs shown) and iOS requirement (12.4 vs 15.5). OpenBook's advantage is update cadence (every 2 weeks vs every 2 months). On price 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. Kunto Lite asks for nothing beyond the download.

Kunto Lite ships an update every 2 months, OpenBook every 2 weeks. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Kunto Lite | OpenBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 22 MB | 55 MB |
| Requires iOS | **12.4** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kuntosolutions Oy](https://appshunter.io/developer/1570117333) | [OpenArcX Pty Ltd](https://appshunter.io/developer/1870700465) |

## What reviewers say

### Kunto Lite

[App page](https://appshunter.io/ios/app/kunto-lite/id1666259074)

**In-app purchases:** none


### 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 Kunto Lite free?

Kunto Lite is free to download, with no in-app purchases.

### Is OpenBook free?

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

### Do Kunto Lite or OpenBook have ads?

OpenBook shows ads; Kunto Lite does not.

### Which is updated more often, Kunto Lite or OpenBook?

Kunto Lite ships an update every 2 months, and OpenBook every 2 weeks. Most recently, Kunto Lite was updated on September 16, 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.*