# Víz Világnapja vs Plant Problem Identifier

The clearest difference is in-app purchases: Víz Világnapja at none against Plant Problem Identifier's 1. Víz Világnapja also leads on iOS requirement (11.0 vs 15.0). Plant Problem Identifier's advantage is update cadence (every 9 months vs every 31 months). On price, ads and device support there is nothing between them.

Both are free to download. Plant Problem Identifier sells 1 in-app purchase, starting at $3.99 per 7 days. Víz Világnapja asks for nothing beyond the download.

Víz Világnapja ships an update every 31 months, Plant Problem Identifier every 9 months. The most recent releases landed on October 29, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Víz Világnapja | Plant Problem Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (171 ratings)](https://appshunter.io/ios/app/plant-problem-identifier/id6444363502/reviews)** |
| Number of ratings | — | **171** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 9 months** |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 96 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MTA SZTAKI](https://appshunter.io/developer/381282454) | [Uladzislau Yanushka](https://appshunter.io/developer/1464429742) |

## What reviewers say

### Víz Világnapja

[App page](https://appshunter.io/ios/app/viz-vilagnapja/id1085104307)

**Features:** macOS Compatibility

**In-app purchases:** none


### Plant Problem Identifier

[App page](https://appshunter.io/ios/app/plant-problem-identifier/id6444363502)

Instantly identify plants and diagnose plant diseases using your phone's camera. Get detailed information on over 35,000 plant species and 90+ disease types, along with treatment suggestions. Access helpful articles on plant care.

**Highlights:** Identify over 35,000 plant species by photo, Diagnose over 90 plant disease classes, Receive plant and disease information, Get treatment suggestions for diseases, Read useful articles on plant care, Unlimited access with Pro subscription

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plant Identifier Pro | $3.99 | per 7 days |


## Frequently asked questions

### Is Víz Világnapja free?

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

### Is Plant Problem Identifier free?

Plant Problem Identifier is free to download, with in-app purchases available.

### Do Víz Világnapja or Plant Problem Identifier have ads?

Neither Víz Világnapja nor Plant Problem Identifier shows ads.

### Which is updated more often, Víz Világnapja or Plant Problem Identifier?

Víz Világnapja ships an update every 31 months, and Plant Problem Identifier every 9 months. Most recently, Víz Világnapja was updated on October 29, 2026 and Plant Problem Identifier on November 7, 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.*