# SumXMinus vs Cambridge C2 Exam Simulator

The clearest difference is in-app purchases: SumXMinus at none against Cambridge C2 Exam Simulator's 3. SumXMinus also leads on iOS requirement (16.0 vs 18.2). Cambridge C2 Exam Simulator's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. Cambridge C2 Exam Simulator sells 3 one-off in-app purchases. SumXMinus asks for nothing beyond the download.

SumXMinus ships an update every 6 weeks, Cambridge C2 Exam Simulator every 3 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SumXMinus | Cambridge C2 Exam Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cambridge-c2-exam-simulator/id6744572297/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 32 MB | 24 MB |
| Requires iOS | **16.0** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [TCK Systems LLC](https://appshunter.io/developer/1806662927) |

## What reviewers say

### SumXMinus

[App page](https://appshunter.io/ios/app/sumxminus-negative-math/id6480327347)

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

**In-app purchases:** none


### Cambridge C2 Exam Simulator

[App page](https://appshunter.io/ios/app/cambridge-c2-exam-simulator/id6744572297)

Prepare for the Cambridge C2 Certificate of Proficiency in English (CPE) with a comprehensive exam simulator. Practice Reading, Use of English, and Listening sections with unlimited tests, detailed explanations, and progress tracking. Developed and reviewed by English teachers for high-quality preparation.

**Highlights:** Unlimited Reading & Use of English exams, Unlimited Listening exams, Focus on specific exam sections, Track progress and scores, Infinite scroll for daily practice, Extended feedback and explanations, Professional teacher-reviewed content

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime - Unlimited Access | $14.99 | one-time |
| 2 Weeks - Unlimited Access | $16.99 | one-time |
| Lifetime - Unlimited Access | $27.99 | one-time |


## Frequently asked questions

### Is SumXMinus free?

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

### Is Cambridge C2 Exam Simulator free?

Cambridge C2 Exam Simulator is free to download, with in-app purchases available.

### Do SumXMinus or Cambridge C2 Exam Simulator have ads?

SumXMinus shows ads; Cambridge C2 Exam Simulator does not.

### Which is updated more often, SumXMinus or Cambridge C2 Exam Simulator?

SumXMinus ships an update every 6 weeks, and Cambridge C2 Exam Simulator every 3 weeks. Most recently, SumXMinus was updated on October 9, 2026 and Cambridge C2 Exam Simulator on October 16, 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.*