# Mathematical keyboard A > This is a soft keyboard that is convenient for writing math expressions. Canonical page: [https://chrome-stats.com/d/com.fc2.web.etuc.keyboard09](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard09) ## Overview - **ID:** `com.fc2.web.etuc.keyboard09` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** hosinoatusi - **Category:** PRODUCTIVITY - **Downloads:** 122 - **Version:** 4.0 - **Last updated:** 2025-09-04 - **First published:** 2018-03-30 - **Publisher country:** JP - **Size:** 5.54 MB - **Data as of:** 2026-09-14 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.fc2.web.etuc.keyboard09) - **Privacy policy:** [https://hosinoatusi.web.fc2.com/privacy.html](https://hosinoatusi.web.fc2.com/privacy.html) ## Description This is a soft keyboard that is convenient for writing math problems, expressions, etc.
Numbers, symbols, alphabets and Greek letters can be entered without switching the keyboard or converting.
You can enter numbers 0 through 9 and "!?√#|%$\°^:+±-~*×/÷=≠≒≡<≦>≧({[)}].," for mathematical symbols.
If you press the key of the symbol continuously, it switches to a different symbol.
When "x, y, π" is pushed continuously, it switches to "i, e, n, p, r, z".
When you press the "sin" key, "sincostan" is entered collectively.
Please use except the necessary parts.
When you press the "log" key, "log" is entered.



Enabling Keyboards

01
Go to Settings > System > Languages & input > and tap Virtual keyboard in the Keyboard & inputs section.

02
You'll see a list of each keyboard you've installed.
Tap "Manage keyboards".

03
Toggle on the new keyboard.
You might see a warning that this input method may collect the text you type including personal information.
But this app does not collect any input content.
This is not a warning specific to this application, it will always be displayed if you select a character input application other than the keyboard that is standard on the device.
If you're satisfied with the explanation, tap OK.


Note: Instructions will vary depending on your Android OS.



Switching Keyboards

01
Launch the app you want to type in.

02
Tap to bring up the keyboard.

03
Tap the keyboard icon on the bottom right.
(On some devices this icon isn't present, in that case pull down the notification bar when a keyboard is active.)

04
Choose the keyboard from the list that pops up. ## Rankings - #1,903,847 — Overall ## Permissions and access ### Permissions - `com.android.vending.CHECK_LICENSE` ## Similar extensions and apps - [Mathematical keyboard B](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard10) — 3,796 users, 3.67 / 5 - [Mathematical keyboard C](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard11) — 492 users - [Mathematical keyboard D](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard27) — 3,097 users, 4.50 / 5 - [Mathematical keyboard E](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard32) — 398 users - [Mathematical keyboard F](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard33) — 4,651 users - [Math Symbol Keyboard](https://chrome-stats.com/d/com.appallure.mathkeyboard) — 2,684 users - [Math Keyboard](https://chrome-stats.com/d/com.fairbird.math_keyboard) — 164,958 users, 2.69 / 5 - [Superscript numeric keypad](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard16) — 2,685 users, 3.40 / 5 - [Math Editor & Keyboard](https://chrome-stats.com/d/com.vougadev.se.free) — 76,589 users, 2.40 / 5 - [Subscript numeric keypad](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard17) — 2,264 users - [Chess keyboard](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard18) — 73 users - [Roman numeric keypad](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard28) — 337 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.fc2.web.etuc.keyboard09)