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4us

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Developer Info

4us was founded in 2009 in Japan. The first app was launched in June 29, 2009 and they have 51 iOS apps in August 2025

4us is a publisher of K4us Rumanian Keyboard app and other apps in Productivity, Utilities categories.

HQ Location
Japan
Founded in
June 29, 2009
Last App Updated
4 weeks ago (July 21, 2025)
Company Website
http://www.4us.jp
Contacts
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Popular 4us apps in 2025

Japan
Name
K4us Rumanian Keyboard
K4us Portuguese Keyboard
with Arrow Keys, AEI Keyboard
K4us Spanish Keyboard
简单易用的AI助手，专业咨询，协助处理工作学习任务
K4us French Keyboard
with Arrow Keys, AEI Keyboard
K4us English Keyboard
简单易用的AI助手，专业咨询，协助处理工作学习任务
Easy Mailer Portuguese
Easy Mailer Spanish Keyboard
With Arrow Keys
Easy Mailer Swedish Keyboard
Art of Match
Motsho Bondhu
Easy Mailer Rumanian Keyboard
Easy Mailer Italian Keyboard
Easy Mailer German Keyboard
Pfeiltasten
냉쿡
Easy Mailer Danish / Norwegian
Easy Mailer Dutch Keyboard
Easy Mailer Russian Keyboard
Phone Pad URL Keyboard
Mobile Phone Input : URL Note
Phone Pad SMS / Mail Keyboard
Mobile Phone Input
K4us German Keyboard
with Arrow Keys, AEI Keyboard
K4us Swedish Keyboard
K4us Dutch Keyboard
K4us Italian Keyboard
简单易用的AI助手，专业咨询，协助处理工作学习任务
K4us Danish Keyboard
with Arrow keys
Arrow Keys URL Keyboard
矢印キーなどを追加
W TEXT BOX
Arrow Keys Mail Keyboard
Arrow Keys Mail Vietnamese
Arrow Keys Mail Japanese
Arrow Keys Latin Mail Keyboard
RGB Color Slider
Mach ein Pixelfoto!
AEI Keyboard URL Note
Original Keyboard
Write with Web
AEI Keyboard Note Spanish
スペイン語　オリジナル・キーボード
AEI Keyboard Note Italian
Easy URL Keyboard
矢印キー！
Easy Mailer Japanese Keyboard
矢印キーが嬉しい
Easy Mailer Chinese Keyboard
AEI Keyboard Note Portuguese
Original Keyboard
AEI Keyboard Note Swedish
AEI Keyboard Note Rumanian
AEI Keyboard Note English
英語　オリジナル・キーボード
AEI Keyboard Note Dutch
Original Keyboard
AEI Keyboard Note Danish
AEI Keyboard Note German
ドイツ語　オリジナル・キーボード
AEI Keyboard Note French
2 Field % Calc
どのくらいの拡大縮小率にするかを計算
Remote TV : Control Universal
同じ数を繰り返し計算
Aspect Ratio X Calc
何対何を求める計算アプリ
レンジで何秒？
電子レンジの秒数計算アプリ
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