What is Katsuna?

Katsuna is a pathway from feature phones to smartphones. Katsuna Android customization is the superior experience for seniors. We deliver convenience on Android empowering people for accessing technology.

An ecosystem of basic apps plus Android UI revisited.

Discover the Katsuna OS for seniors

Native Android experience for seniors on Google phones

Or Explore our ecosystem of apps

To install on your own smartphone




Self evolving User Experience

Focus on what matters most. Reducing options to necessary. Highlight the 2 most significant actions in every use case.

Purpose driven concept with short interaction paths. Consistent experience, reduced time to Android adaptation. Unified the main user interface on Android to reduce the learning curve.

Tailored UI based on distinct physical and mental user capabilities. Device to User interaction to improve physical and mental condition. The Katsuna ROM is capable to understand user needs on the go and to adapt accordingly.