# Computer Science Calculations vs Gestro App

The clearest difference is in-app purchases: Gestro App at none against Computer Science Calculations's 3. Gestro App also leads on ads (none vs shown) and update cadence (every 5 days vs monthly). On price, device support and iOS requirement 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. Gestro App asks for nothing beyond the download.

Computer Science Calculations ships an update monthly, Gestro App every 5 days. The most recent releases landed on August 26, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Computer Science Calculations | Gestro App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 5 days** |
| Size | 26 MB | 131 MB |
| Requires iOS | **15.0** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) | [Gehax GmbH](https://appshunter.io/developer/1729547321) |

## 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 |


### Gestro App

[App page](https://appshunter.io/ios/app/gestro-app/id6741706816)

**Features:** macOS Compatibility

**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 Gestro App free?

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

### Do Computer Science Calculations or Gestro App have ads?

Computer Science Calculations shows ads; Gestro App does not.

### Which is updated more often, Computer Science Calculations or Gestro App?

Computer Science Calculations ships an update monthly, and Gestro App every 5 days. Most recently, Computer Science Calculations was updated on August 26, 2026 and Gestro App on September 9, 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.*