# CloudLabs 2x2 Equation System vs Stay Sharp

The clearest difference is in-app purchases: CloudLabs 2x2 Equation System at none against Stay Sharp's 3. CloudLabs 2x2 Equation System also leads on iOS requirement (9.0 vs 13.0). Stay Sharp's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Stay Sharp sells 3 in-app purchases, starting at $2.99 per month. CloudLabs 2x2 Equation System asks for nothing beyond the download.

CloudLabs 2x2 Equation System ships an update every 2 months, Stay Sharp every 2 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CloudLabs 2x2 Equation System | Stay Sharp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stay-sharp-sharpen-your-mind/id6744872720/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Freemium |
| Size | 84 MB | 80 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Jiovany Orozco](https://appshunter.io/developer/1114670847) | [Amane soft s.r.o.](https://appshunter.io/developer/1801423544) |

## What reviewers say

### CloudLabs 2x2 Equation System

[App page](https://appshunter.io/ios/app/cloudlabs-2x2-equation-system/id1637465538)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stay Sharp

[App page](https://appshunter.io/ios/app/stay-sharp-sharpen-your-mind/id6744872720)

Discover fascinating facts and bite-sized trivia personalized to your interests. Learn something new in seconds, delivered daily on your schedule. Turn screen time into brain time with fun, effortless learning.

**Highlights:** Personalized trivia based on interests, Bite-sized facts under 30 seconds, Customizable daily notifications, Fun and effortless learning, Wide range of topics

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stay Sharp Monthly Sub | $2.99 | per month |
| Stay Sharp Annual Sub | $24.99 | per year |
| Stay Sharp Premium Forever | $39.99 | one-time |


## Frequently asked questions

### Is CloudLabs 2x2 Equation System free?

CloudLabs 2x2 Equation System is free to download, with no in-app purchases.

### Is Stay Sharp free?

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

### Do CloudLabs 2x2 Equation System or Stay Sharp have ads?

Neither CloudLabs 2x2 Equation System nor Stay Sharp shows ads.

### Which is updated more often, CloudLabs 2x2 Equation System or Stay Sharp?

CloudLabs 2x2 Equation System ships an update every 2 months, and Stay Sharp every 2 weeks. Most recently, CloudLabs 2x2 Equation System was updated on October 25, 2026 and Stay Sharp on October 24, 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.*