# YSS ELC vs Cat Probability Roulette

The clearest difference is in-app purchases: YSS ELC at none against Cat Probability Roulette's 1. YSS ELC also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). Cat Probability Roulette's advantage is update cadence (every 2 months vs every 5 months). On price and device support there is nothing between them.

Both are free to download. Cat Probability Roulette sells 1 one-off in-app purchase. YSS ELC asks for nothing beyond the download.

YSS ELC ships an update every 5 months, Cat Probability Roulette every 2 months. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | YSS ELC | Cat Probability Roulette |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/yss-elc/id908053550/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 10 MB | 147 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Edusoft.ltd](https://appshunter.io/developer/908053553) | [Yusuke Okada](https://appshunter.io/developer/1793725878) |

## What reviewers say

### YSS ELC

[App page](https://appshunter.io/ios/app/yss-elc/id908053550)

Prepare for the speaking sections of TOEFL Junior and TOEFL Primary tests. Practice conversational skills and answering open-ended questions to build confidence for exam success.

**Highlights:** TOEFL Junior speaking practice, TOEFL Primary speaking practice, Conversation practice, Open-ended question answering, Exam preparation

**Features:** macOS Compatibility

**In-app purchases:** none


### Cat Probability Roulette

[App page](https://appshunter.io/ios/app/cat-probability-roulette/id6754866024)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.49 | one-time |


## Frequently asked questions

### Is YSS ELC free?

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

### Is Cat Probability Roulette free?

Cat Probability Roulette is free to download, with in-app purchases available.

### Do YSS ELC or Cat Probability Roulette have ads?

Cat Probability Roulette shows ads; YSS ELC does not.

### Which is updated more often, YSS ELC or Cat Probability Roulette?

YSS ELC ships an update every 5 months, and Cat Probability Roulette every 2 months. Most recently, YSS ELC was updated on October 19, 2026 and Cat Probability Roulette on October 6, 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.*