StemsApp studio, Tokyo

Stems

Stems is an app studio in Tokyo. Apps grow here slowly, one stem at a time.

001 KOKEMUSUMoss garden for time away from your phoneiPhone · Coming soonKOKEMUSU app: a moss garden in the rain, a pot on a wooden stand002 Next, still a seed
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Today, Sep 29

001 KOKEMUSU

A moss garden that grows while your phone is down.

Call the rain, and the apps you chose stay locked until it stops. The moss drinks and grows. Every ten minutes of rain fills a cup of rainwater for new pots and moss. Stop early and the garden only dries a little.

Planted
2026.09.17
Platform
iPhone
Made by
Stems: concept, design, sound, code
Status
Coming soon to the App Store
  1. Opening screen: a bowl of moss on tatami and the words Set the phone down. Grow moss.01Set the phone down
  2. How it works: the moss grows, the apps you chose stay locked, rainwater collects02When you call the rain
  3. Choosing a vessel for the first moss: Edo glass or Kiyomizu ware03Your first pot
  4. The garden while it rains, with the moss fully grown and 25 minutes left04The garden, raining
  5. Rain panel: 25 minutes left, rainwater collected, and lengths from 15 minutes to 2 hours05How long it rains
  6. A glass bowl of Sugi-goke on a cloth, seen up close06A pot up close

Vessels and mosses

  • Sugi-goke in a round lapis-glazed pot on the stand
    Kiyomizu ware
    Sugi-goke
  • Hai-goke in a shallow oval iron-glazed pot on the stand
    Mashiko ware
    Hai-goke
  • Tama-goke in a rectangular unglazed pot on the stand
    Tokoname ware
    Tama-goke
  • Sugi-goke in a round glass bowl on the stand
    Edo glass
    Sugi-goke
  • Tama-goke in a tall glass jar on the stand
    Otaru glass
    Tama-goke
  • Hai-goke in a square glass vessel on the stand
    Hizen vidro
    Hai-goke