Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Not yet tested.
The store currently lists version 2.0, updated 2026-10-15.
Store screenshots supplied by the developer.
Paint with floating ink.
Sumi brings suminagashi, the centuries-old Japanese art of floating ink on water, to your iPhone.
Tap to let a drop of ink fall onto the water and watch it bloom into crisp, concentric rings. Drag your finger through the water to pull those rings into swirls, waves and curls that keep drifting after you let go. No two pieces are ever the same.
Choose from classic inks like Sumi black, Matcha, Sakura and Indigo, or mix your own colors. When you're happy with your piece, lift it as a print, set it as your wallpaper, or watch a time-lapse of how it came to life.
Sumi is a quiet space to unwind and create. No accounts, no data collected. Just you, the ink and the water.
Slow down. Create. Flow.
From the developer’s store description.
For developers and the curious
The evidence, sources, measurements and versions behind every label above.
No review analysis published for this app.
“Not assessed” means we could not measure it. It is never a zero and never a pass.
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.
Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
Not yet tested. No analysis has been run for this app, so there is no version or date to report.
Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
A fresh new look and a smoother flow. We've updated the fluid mechanics so the ink moves more naturally. Drops bloom and spread like real ink on water and the water keeps drifting after you lift your finger. The colour palette has been refined with richer, more harmonious inks, so every piece looks even more beautiful. Enjoying Sumi? A rating on the App Store helps other people find it.
Appworthy
sumiWhat the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
No itemized purchase list is available for this listing.
Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.
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