# Keyboard² vs Time Calc. Pro

The clearest difference is price: Keyboard² at Free against Time Calc. Pro's $0.99. Keyboard² also leads on update cadence (every 12 months vs every 28 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Keyboard² is free to download; Time Calc. Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Keyboard² ships an update every 12 months, Time Calc. Pro every 28 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Keyboard² | Time Calc. Pro |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/keyboard/id1337674728/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 28 months |
| Monetization | Free | — |
| Size | 11 MB | 2 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuto Nakamura](https://appshunter.io/developer/1203150472) | [Hiroyuki Nishijima](https://appshunter.io/developer/1389796249) |

## What reviewers say

### Keyboard²

[App page](https://appshunter.io/ios/app/keyboard/id1337674728)

This custom keyboard app allows you to play musical notes and chords directly from your device's keyboard. It supports entering numbers, mathematical symbols, and ABC music notation, with the ability to play sounds and chords.

**Highlights:** Play musical notes and chords, Enter numbers and mathematical symbols, Supports ABC music notation, Play sounds, Custom keyboard functionality

**Features:** Vision Pro support

**In-app purchases:** none


### Time Calc. Pro

[App page](https://appshunter.io/ios/app/time-calc-pro/id1509605480)

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

**In-app purchases:** none


## Frequently asked questions

### Is Keyboard² free?

Keyboard² is free to download, with no in-app purchases.

### Is Time Calc. Pro free?

Time Calc. Pro costs $0.99, with no in-app purchases.

### Do Keyboard² or Time Calc. Pro have ads?

Neither Keyboard² nor Time Calc. Pro shows ads.

### Which is updated more often, Keyboard² or Time Calc. Pro?

Keyboard² ships an update every 12 months, and Time Calc. Pro every 28 months. Most recently, Keyboard² was updated on November 2, 2026 and Time Calc. Pro on November 3, 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.*