1C Big Keyboard

1C Big Keyboard

Mahjong Brain Puzzles
★★★★☆ 4.1 Productivity v1.210 5,000,000+
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1C Big Keyboard Screenshot 11C Big Keyboard Screenshot 21C Big Keyboard Screenshot 31C Big Keyboard Screenshot 41C Big Keyboard Screenshot 51C Big Keyboard Screenshot 6
Version
1.210
Downloads
5,000,000+
Updated
Jun 15, 2026
Developer
Mahjong Brain Puzzles
Category
Productivity
Content Rating
Everyone
Package
com.onecwearable.keyboard
Platform
Android

Download Sources

Device Configuration

Split APKs Installation Guide

Some apps are distributed as Split APKs (multiple .apk files packaged together) to optimize resources. Standard Android installers cannot open them.

1. Download Split APKs Installer (SAI) from Google Play Store.
2. Download the app archive (.apks) using the download sources listed above.
3. Open SAI, click "Install APKs", choose the downloaded archive, and click Install.

What's New

Improved custom keys in landscape mode.

About this app

I am 58 and my vision is far from perfect. I have fingers on my hands - not matchsticks, so I designed this keyboard for myself. If you’re under 35 and have no problems with vision, please do not install. You will need it later. But maybe it will be a good lifehack for your parents now.


This ergonomic keyboard for Android allows using 100% of your phone’s screen for big keys making it indispensable on small screen devices and for fat fingers (100% is not an advertising slogan: it is literally 100%). Swipe up to switch into 100% display mode.
This big keyboard preserves your vision and reduces eye strain.
Big keyboard keys are easier to hit – less typos.
The layout of this large keyboard for Android is easy to learn – it’s a QWERTY keyboard smartly compressed into extra large keyboard, what makes it ideal for large hands.

User Reviews

A Google user Apr 10, 2019
★★★★☆

A must for us cursed with hammer thumbs. Wide keys (not merely tall) and the option to make the letters blaze orange if you like (if you have failing eyesight to go with your hammer thumbs). The ads are annoying, but then again, they're supposed to be. 10 bucks is steep, the devs know this, which is why they allow you to 'rent' it at 2 dollars for 3 months. The typing speed is a wee-bit sluggish, and some symbols are missing (like dollar signs). Yet, I've never texted quicker

A Google user Apr 15, 2020
★☆☆☆☆

I liked this app at first, but lm extremely disappointed ln their failure to fix some of the obvious shortcomings. One, seen above, is that it doesn't recognize contractions, so you have to go to the 123 screen to insert an apostrophe. The worst, though, is that if you enter "i", it autocorrects to "it", rather than "I". That is totally idiotic programming!

Louis Hazard Jan 27, 2022
★★★☆☆

Enjoy this keyboard, but hesitant to use it more often. Dictionary and predictive spelling not up to snuff for my daily use. Other keyboards do a much better job, with more mistakes on my part (due to smaller keys) , of suggesting what they think I meant. Because of this, I dont use it enough to warrant paying to remove ads. One ad a day currently meets my usage. Favorite feature is the customization available for the keyboard.

A Google user Mar 16, 2020
★★★★★

This big key keyboard is terrific for us people who have large hands and find the built-in phone keyboards difficult to use. Even with the largest cell phone screen the standard QWERTY arrangement is a problem. This keyboard places each normal row of keys on two rows, which allows the keys to be bigger. It is similar to the Big Key Deluxe app, which is the one I used until a problem with the screen occurred. It is customizable with key size, color, languages that can be installed. Great!

How to Download 1C Big Keyboard APK

  1. Enter the package name com.onecwearable.keyboard on the APK Downloader.
  2. Select your device architecture (ARM64 recommended for modern devices).
  3. Click Download to get the merged APK file.
  4. Transfer and install the APK on your Android device.
  5. Keep Updated: Visit APKDER.COM regularly to search for and download the latest secure versions of your favorite apps.

Security & Signature Verification

This APK download is 100% safe. We verify that the cryptographic signature of the file matches the official developer credentials. No modifications or adware are injected.

Wi-Fi connection information Basic Access
  • view Wi-Fi connections
Other Basic Access
  • view network connections
  • full network access
  • control vibration
  • prevent device from sleeping

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