RiKeyboard vs PhysKey Custom
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RiKeyboard
This app provides an enhanced keyboard experience with a wide range of characters beyond standard alphabets and numbers. It includes various symbols and special mathematical characters, all accessible without requiring full keyboard access.
- Alphabet input
- Number input (123, ¹²³, ₁₂₃)
- Standard symbols
- Special characters (integral, sigma)
- No full access required
Read full descriptionHide full description
搭載機能 ・アルファベット入力 ・数字入力（123/¹²³/₁₂₃） ・純正キーボードに搭載される記号（一部省略） ・その他特殊文字（インテグラルやシグマなど） フルアクセスなしですべての機能が使えます。 Credit tasty-imitation-keyboard by archagon
PhysKey Custom
Read full descriptionHide full description
A custom keyboard built for science and math enthusiasts. Say goodbye to the hassle of symbol input and streamline your typing on mobile. Features Type Greek letters (α, β, γ...) directly from the key layout Access frequently used physical constants and units in one tap Full coverage of math symbols (∫, Σ, √...) Works in every app — notes, social media, and more Perfect for writing science reports, logging experimental data, or chatting while studying. No more typing out "alpha" and hunting through conversion suggestions. Give PhysKey a try — simple, intuitive, and built for the way you think.
Screenshots
Verdict
The clearest difference is update cadence: RiKeyboard at every 3 weeks against PhysKey Custom's every 4 months. RiKeyboard also leads on iOS requirement (8.0 vs 16.0). 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.
RiKeyboard ships an update every 3 weeks, PhysKey Custom every 4 months. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.
| Parameter | RiKeyboard | PhysKey Custom |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) — better | — |
| Positive reviews | 82.4% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 17 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | nakamura yusaku | Ryosuke Asano |
In-app purchases
RiKeyboard
No in-app purchases
PhysKey Custom
No in-app purchases
