# Nerdie vs KRIZ

The clearest difference is in-app purchases: KRIZ at none against Nerdie's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Nerdie sells 1 in-app purchase, starting at $12.99 per year. KRIZ asks for nothing beyond the download.

Nerdie ships an update every 10 days, KRIZ fortnightly. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Nerdie | KRIZ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Size | 47 MB | 46 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HALIL AHMET CENGELOGLU](https://appshunter.io/developer/1863259309) | [Kateryna Dimitrashko](https://appshunter.io/developer/6797778450) |

## What reviewers say

### Nerdie

[App page](https://appshunter.io/ios/app/nerdie-book-tracker/id6787246760)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nerdie Premium Yearly | $12.99 | per year |


### KRIZ

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Nerdie free?

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

### Is KRIZ free?

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

### Do Nerdie or KRIZ have ads?

Neither Nerdie nor KRIZ shows ads.

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

Nerdie ships an update every 10 days, and KRIZ fortnightly. Most recently, Nerdie was updated on September 30, 2026 and KRIZ on October 4, 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.*