# Owlculator vs Calcula Keyboard

The clearest difference is in-app purchases: Calcula Keyboard at none against Owlculator's 1. Owlculator's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Owlculator sells 1 one-off in-app purchase. Calcula Keyboard asks for nothing beyond the download.

Owlculator ships an update every 4 days, Calcula Keyboard every 2 weeks. The most recent releases landed on September 11, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Owlculator | Calcula Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 2 MB | 2 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Fishington Studios](https://appshunter.io/developer/344044425) | [锦珍 黄](https://appshunter.io/developer/1731622169) |

## What reviewers say

### Owlculator

[App page](https://appshunter.io/ios/app/owlculator-math-notes/id6761601067)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $4.99 | one-time |


### Calcula Keyboard

[App page](https://appshunter.io/ios/app/calcula-keyboard/id6764356974)

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

**In-app purchases:** none


## Frequently asked questions

### Is Owlculator free?

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

### Is Calcula Keyboard free?

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

### Do Owlculator or Calcula Keyboard have ads?

Neither Owlculator nor Calcula Keyboard shows ads.

### Which is updated more often, Owlculator or Calcula Keyboard?

Owlculator ships an update every 4 days, and Calcula Keyboard every 2 weeks. Most recently, Owlculator was updated on September 11, 2026 and Calcula Keyboard on September 6, 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.*