# Po Book Tracker vs KRIZ

The clearest difference is device support: KRIZ at 3 against Po Book Tracker's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Po Book Tracker sells 1 one-off in-app purchase and KRIZ sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Po Book Tracker | KRIZ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | — | Every 3 weeks |
| Size | 4 MB | 46 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Barancan YARDIMCI](https://appshunter.io/developer/1865903748) | [Kateryna Dimitrashko](https://appshunter.io/developer/6797778450) |

## What reviewers say

### Po Book Tracker

[App page](https://appshunter.io/ios/app/po-book-tracker/id6758600874)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Po Book Tracker – Lifetime Premium | $8.99 | one-time |


### KRIZ

[App page](https://appshunter.io/ios/app/kriz-reading-diary/id6797778448)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KRIZ Full | $1.99 | per month |
| KRIZ Full | $17.99 | per year |


## Frequently asked questions

### Is Po Book Tracker free?

Po Book Tracker is free to download, with in-app purchases available.

### Is KRIZ free?

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

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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.*