Keyboard² vs Niban
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keyboard²
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.
- Play musical notes and chords
- Enter numbers and mathematical symbols
- Supports ABC music notation
- Play sounds
- Custom keyboard functionality
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Keyboard² is a custom keyboard that enables you to play the keyboard on your iPhone & iPad! [Function] - You can enter numbers and mathematical symbols. - You can enter the musical scales of ABC music notation. - You can play sound. - You can play a chord. [Attention] - You have to do the additional procedure of Keyboard² to use it. (Preferences -> General -> Keyboard) - Then, you also have to turn on the "Full Access" for Keyboard². * Please don’t worry - we do not collect your data at all. [Support] - Please do not hesitate to contact us for any defect reports or questions/requests. - We will consider any requests for additional functions.
Niban
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The app icon is a blue "2". Try placing it next to the "Ichiban" (with "1") icon on your home screen for easy access. Just like a TV remote, simply tap the numbered icon to start a video call - tap "1" for one person, "2" for another. For Beginners: 1) For senior beginners, we recommend having a family member help with the initial setup. 2) Let them know: "I've added another contact. You can now video call with [name]" and "Look for the blue '2' icon." 3) After setup, please help them test the connection and guide them through their first calls. Setup and Operation: Same simple process as "Ichiban" app.
Screenshots
Verdict
The clearest difference is update cadence: Niban at every 2 months against Keyboard²'s every 12 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Keyboard² ships an update every 12 months, Niban every 2 months. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.
| Parameter | Keyboard² | Niban |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 12 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 11 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Takuto Nakamura | Yuko Nakata |
In-app purchases
Keyboard²
No in-app purchases
Niban
No in-app purchases
