# Control Systems Engineering vs 12thPass Classroom

The clearest difference is in-app purchases: 12thPass Classroom at none against Control Systems Engineering's 6. 12thPass Classroom also leads on update cadence (every 5 days vs every 3 months) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Control Systems Engineering sells 6 in-app purchases, starting at $9.99 per month. 12thPass Classroom asks for nothing beyond the download.

Control Systems Engineering ships an update every 3 months, 12thPass Classroom every 5 days. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Control Systems Engineering | 12thPass Classroom |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Size | 18 MB | 39 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [Bozon AI Labs](https://appshunter.io/developer/1896276611) |

## What reviewers say

### Control Systems Engineering

[App page](https://appshunter.io/ios/app/control-systems-engineering/id6739731886)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


### 12thPass Classroom

[App page](https://appshunter.io/ios/app/12thpass-classroom/id6766321819)

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

**In-app purchases:** none


## Frequently asked questions

### Is Control Systems Engineering free?

Control Systems Engineering is free to download, with in-app purchases available.

### Is 12thPass Classroom free?

12thPass Classroom is free to download, with no in-app purchases.

### Do Control Systems Engineering or 12thPass Classroom have ads?

Neither Control Systems Engineering nor 12thPass Classroom shows ads.

### Which is updated more often, Control Systems Engineering or 12thPass Classroom?

Control Systems Engineering ships an update every 3 months, and 12thPass Classroom every 5 days. Most recently, Control Systems Engineering was updated on October 2, 2026 and 12thPass Classroom on October 10, 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.*