Independent app studio
We build apps that make everyday life a little lighter.
suplum is a Japan-based independent studio that designs, develops, and operates application services, with a focus on privacy-respecting iOS apps.
What we do
What we do
App design & development
We design and build iOS apps end-to-end, focused on solving the small frictions of everyday life.
Operation & maintenance
We keep apps running for the long term — updates, bug fixes, and user support after release.
Privacy-first by design
We handle only the data we need, to the extent we need it, and disclose why we collect it.
Our apps
Our apps
sloupon
iOS
(Tagline to be added)
sloupon is an iOS app currently in development at suplum, designed to stay simple and handle only the data it needs. (This description is a placeholder.)
Nyxtune
iOS / Android
Better sleep, one record at a time.
Nyxtune is an iOS and Android app that supports sleep tracking and habit building, grounded in the principles of cognitive behavioural therapy for insomnia (CBT-I).
Our name & mark
Integrity that blooms
in the depth of winter.
“suplum” blends superior and plum. Like the plum that blooms first in the cold, we aim for quiet, steadfast craftsmanship.
The symbol — five circles drawn from the umebachi family crest. The gold center speaks of excellence and fragrance; the purple, of nobility and grace.
Built to be trusted
Built to be trusted
We publish on the web the information required for apps distributed on the App Store.