# Probability for kids vs Environmental Engineering PRO

The clearest difference is price: Probability for kids at Free against Environmental Engineering PRO's $0.49. Probability for kids also leads on iOS requirement (10.0 vs 13.0). Environmental Engineering PRO's advantage is update cadence (every 5 months vs every 27 months). On ads, in-app purchases and device support there is nothing between them.

Probability for kids is free to download; Environmental Engineering PRO costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

Probability for kids ships an update every 27 months, Environmental Engineering PRO every 5 months. The most recent releases landed on September 8, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Probability for kids | Environmental Engineering PRO |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[1.3 (3 ratings)](https://appshunter.io/ios/app/probability-for-kids/id1146775328/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 52 MB | 23 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [www.ajaxmediatech.com](https://appshunter.io/developer/973768003) | [Manish Kumar](https://appshunter.io/developer/1854995154) |

## What reviewers say

### Probability for kids

[App page](https://appshunter.io/ios/app/probability-for-kids/id1146775328)

An interactive math app designed for young children to learn the concepts of probability and statistics through a game-like experience. It uses colorful illustrations and animations to make learning engaging and easy.

**Highlights:** Learn Probability & Statistics terms, Practice Probability Mathematics, Engaging Probability concepts, Interactive learning with animations, Gamified education model

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

**In-app purchases:** none


### Environmental Engineering PRO

[App page](https://appshunter.io/ios/app/environmental-engineering-pro/id6759217834)

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

**In-app purchases:** none


## Frequently asked questions

### Is Probability for kids free?

Probability for kids is free to download, with no in-app purchases.

### Is Environmental Engineering PRO free?

Environmental Engineering PRO costs $0.49, with no in-app purchases.

### Do Probability for kids or Environmental Engineering PRO have ads?

Neither Probability for kids nor Environmental Engineering PRO shows ads.

### Which is updated more often, Probability for kids or Environmental Engineering PRO?

Probability for kids ships an update every 27 months, and Environmental Engineering PRO every 5 months. Most recently, Probability for kids was updated on September 8, 2026 and Environmental Engineering PRO on September 17, 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.*