Citra Studio

Independent app studio

Small apps,
made to be useful.

Citra Studio is an independent developer creating focused apps for learning, play, and a little more ease in everyday use.

Explore the apps

Available now

Apps on the App Store

Only apps currently verified as available on the App Store are listed here.

Speed Grid 25 app icon

Puzzle · iPhone

Speed Grid 25

Tap the randomly arranged numbers from 1 to 25 in order. Track your time and reaction speed, improve your personal best, and take on online rankings.

App StoreSupport
Basic Calculation Training app icon

Education · iPhone

徹底基礎計算 - 算数・数学

A focused training app for building speed and accuracy through repeated practice, from the four basic operations to elementary and junior-high calculations.

App StoreSupport
Ad Block and PiP Assistant app icon

Utilities · iPhone / iPad

Ad Block & PiP Assistant

A Safari utility that reduces web ads and assists compatible video pages with Picture in Picture, playback speed controls, and skip actions.

App StoreSupport

Your voice, our next step

Tell us what you think

Your feedback helps shape future ideas and improve the apps already available.

01

Suggest a new app

Share an app idea or a small everyday problem you would like to see solved.

Send an app request

02

Feedback or bug report

Please include the app name, device, OS version, and what happened whenever possible.

Send feedback

03

General contact

For other questions, email citrastudio.dev@gmail.com. App Store reviews are also welcome, while email is recommended for questions or issues that need a reply.