# Computer Science Calculations vs Horizontal PCB

The clearest difference is in-app purchases: Horizontal PCB at none against Computer Science Calculations's 3. Horizontal PCB also leads on ads (none vs shown) and update cadence (every 5 days vs monthly). Computer Science Calculations's advantage is iOS requirement (15.0 vs 26.0). On price and device support there is nothing between them.

Both are free to download. Computer Science Calculations sells 3 in-app purchases, starting at $0.99 per 3 months. Horizontal PCB asks for nothing beyond the download.

Computer Science Calculations ships an update monthly, Horizontal PCB every 5 days. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Computer Science Calculations | Horizontal PCB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 5 days** |
| Size | 26 MB | 33 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) | [Twarge LLC](https://appshunter.io/developer/6781456673) |

## What reviewers say

### Computer Science Calculations

[App page](https://appshunter.io/ios/app/computer-science-calculations/id1488787780)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version (3 months) | $0.99 | per 3 months |
| PRO Version (1 year) | $2.49 | per year |
| PRO Version (Lifetime) | $89.99 | one-time |


### Horizontal PCB

[App page](https://appshunter.io/ios/app/horizontal-pcb/id6781505835)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Computer Science Calculations free?

Computer Science Calculations is free to download, with in-app purchases available.

### Is Horizontal PCB free?

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

### Do Computer Science Calculations or Horizontal PCB have ads?

Computer Science Calculations shows ads; Horizontal PCB does not.

### Which is updated more often, Computer Science Calculations or Horizontal PCB?

Computer Science Calculations ships an update monthly, and Horizontal PCB every 5 days. Most recently, Computer Science Calculations was updated on October 11, 2026 and Horizontal PCB on October 4, 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.*