Focused software for every screen

Single-purpose tools for mobile, desktop, web and E‑Ink — private on-device processing, no ads, and no lock-in.

Processing
On‑device
Ads
None
See the apps
iOS·Android·macOS·Web·E‑Ink

Software

KaiCleaner icon

KaiCleaner

On-device cleanup for phone and Mac.

  • Scan screenshots, exact & near-duplicate photos, and large videos, reviewed by date range before you confirm.
  • On Mac: see where your disk space went, then clear developer junk, duplicates and forgotten files — all to the Trash, restorable.
  • Nothing is deleted automatically.
  • Built around Kai, a companion that lives on your phone.
iOSAndroidmacOS
Status: In App Review (iOS & Mac)
Explore KaiCleaner→
KaiCleaner Mac overview
KaiCleaner Phone home
KaiCam icon

KaiCam

AI pose coach & camera remote.

  • Real-time pose coaching that tells your subject what to fix.
  • Bluetooth & Wi‑Fi remote for Sony and GoPro — shutter, exposure, intervals, automated focus pulls.
  • Photo editor.
  • Pro is an optional subscription or one-time Lifetime.
iOSAndroid
Status: In development
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KaiCam iPad landscape
KaiCam Phone camera
KaiPlay icon

KaiPlay

A calm wooden playroom — first words through play.

  • A Montessori-style playroom of gentle wooden toys (town, kitchen, market, garden, blocks, drawing).
  • First words woven through play, spoken clearly in 13 languages (Vietnamese + English free, 11 more with Premium).
  • Soothe mode + wellbeing timers.
  • Parent Zone behind a parental gate.
  • No ads, no data, everything on-device.
iOSAndroidE‑Ink
Status: In development
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KaiPlay — cooking in the playroom kitchen
KaiPlay — a calm wooden playroom of toys
KaiReader icon

KaiReader

A quiet daily reader that teaches languages.

  • The day's news in 13 languages, in a clean paged reading view.
  • Furigana, pinyin and IPA annotation lines.
  • Offline dictionary + read-aloud + pronunciation scoring.
  • Spaced-repetition review of saved words.
  • Free to read; Pro (subscription or Lifetime) unlocks unlimited languages/feeds/words and Kai's AI.
iOSAndroidE‑Ink
Status: Native apps for iOS & Android
Explore KaiReader→
KaiReader News
KaiReader Furigana
KaiReader Words

How we build

On-Device Only

Photos, reading history and audio stay on your device. Nothing is uploaded to remote servers.

E-Ink Native

Layouts, typography and page turns tuned for BOOX Palma and paper-like screens.

No Lock-In

No ads and no login wall. Where an app has Pro features, a one-time Lifetime purchase is always offered alongside any subscription.

Native Performance

Swift for iOS, Kotlin & Compose for Android. Fast starts and minimal battery impact.

Speech Timer

One timed block per speaker for team meetings — a name, a note, and green/yellow/red cues. Nothing leaves your browser, no account, no server.

Open Speech Timer →