Mobile apps
Experience across healthcare, games, and fintech — shipped on iOS and Android.
Mobile · IoT · Data
We build calm,
capable software.
A Yokohama studio focused on mobile apps, IoT systems, and data analytics — approachable products, made to last.
What we do
Services
We support mobile apps, IoT, and data analytics from development through consulting — practical guidance, from planning to post-launch.
IoT systems
From automotive IoT to Arduino and custom microcontroller platforms — device to cloud.
Data analytics
Visualization, analysis, and consulting — turning collected data into decisions.
Products
Products
We build mobile apps for everyday life: running, learning, and photos.
Snap runs:
Available on iOSRun with maps, routes, and history at a glance. A running tracker built for clarity.
- Map-based run tracking
- Detailed history with routes at a glance
- Graph views for time-series data
Tonaete Kuku Master
Available on iOS & AndroidA voice-guided multiplication table app. Learn the times tables with rhythm and fun.
RotateAll
Available on iOSTurns sideways and upside-down photos the right way up, in batches. Everything stays on your device.
Gohoebi App
In developmentA token economy app for children, kids, and teens — currently in development.
Updates
News
RotateAll released
An iPhone and iPad app that turns sideways and upside-down photos the right way up, in batches, is now on the App Store.
View product →Tonaete Kuku Master released on Android
The app is now available on Google Play, with the same voice-guided practice as the iOS version.
View product →Corporate website refreshed
We launched a new website with a new design.
Snap runs: v1.4.0 released
An App Store update with running view improvements and stability enhancements.
View product →Snap runs: running view redesigned
The in-run UI was fully updated with improved map-based display and controls.
View product →Run without: launched
Released an iOS running app with minimal taps and graphical run history.
View product →Company founded in Yokohama
SONAUMA was established in Yokohama.
Get in touch
Let's build something that lasts.
Development inquiries, product questions, or partnerships — we'd like to hear from you.
Contact us