# KATERYNA vs Diarion

The clearest difference is in-app purchases: KATERYNA at none against Diarion's 3. Diarion's advantage is update cadence (every 5 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Diarion sells 3 in-app purchases, starting at $1.99 per month. KATERYNA asks for nothing beyond the download.

KATERYNA ships an update every 2 months, Diarion every 5 weeks. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | KATERYNA | Diarion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 21 MB | 19 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [MESH Ukraina](https://appshunter.io/developer/1104707952) | [Viktoriia Kuhai](https://appshunter.io/developer/6814251808) |

## What reviewers say

### KATERYNA

[App page](https://appshunter.io/ios/app/kateryna/id1641565963)

**Features:** Vision Pro support

**In-app purchases:** none


### Diarion

[App page](https://appshunter.io/ios/app/diarion/id6814251806)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diarion Base — Monthly | $1.99 | per month |
| Diarion Base — 3 Months | $4.99 | per 3 months |
| Diarion Base — Yearly | $11.99 | per year |


## Frequently asked questions

### Is KATERYNA free?

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

### Is Diarion free?

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

### Do KATERYNA or Diarion have ads?

Neither KATERYNA nor Diarion shows ads.

### Which is updated more often, KATERYNA or Diarion?

KATERYNA ships an update every 2 months, and Diarion every 5 weeks. Most recently, KATERYNA was updated on November 7, 2026 and Diarion on November 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.*