# KRIZ vs Booklogg

The clearest difference is in-app purchases: Booklogg at none against KRIZ's 2. Booklogg also leads on update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. KRIZ sells 2 in-app purchases, starting at $1.99 per month. Booklogg asks for nothing beyond the download.

KRIZ ships an update every 3 weeks, Booklogg every 2 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | KRIZ | Booklogg |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 46 MB | 66 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Kateryna Dimitrashko](https://appshunter.io/developer/6797778450) | [Omer Guler](https://appshunter.io/developer/6810941129) |

## What reviewers say

### 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 |


### Booklogg

[App page](https://appshunter.io/ios/app/booklogg/id6810940917)

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

**In-app purchases:** none


## Frequently asked questions

### Is KRIZ free?

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

### Is Booklogg free?

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

### Do KRIZ or Booklogg have ads?

Neither KRIZ nor Booklogg shows ads.

### Which is updated more often, KRIZ or Booklogg?

KRIZ ships an update every 3 weeks, and Booklogg every 2 days. Most recently, KRIZ was updated on October 25, 2026 and Booklogg on October 26, 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.*