1C Big Keyboard
1C Big Keyboard Summary
1C Big Keyboard is a ad-supported, with in-app purchases Android app in Productivity by Mahjong Brain Puzzles. Released in Mar 2016 (9 years ago). It has about 6.5M+ installs and 24.5K ratings with a 4.20★ (good) average. Based on AppGoblin estimates, it reaches roughly 38.3K monthly active users and generates around $<10K monthly revenue (51% IAP / 49% ads). Store metadata: updated Feb 24, 2026.
Recent activity: 4.4K installs this week (21.1K over 4 weeks) showing steady growth , and 19 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Apr 9, 2025.
Store info: Last updated on Google Play on Feb 24, 2026 .
1C Big Keyboard was last scanned for SDKs 2025-04-09. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Yandex
AppLovin
Google
Facebook
Yandex Metrica
AppMetrica
AdMob
Divkit
Bumptech
Square
Firebase4.2★
Ratings: 24.5K
Screenshots
App Description
Fat fingers on small screen? No problem for poor vision.
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.