INDEPENDENT iOS APP PUBLISHER
Kumu Studio

We build and publish our own iOS apps.
Small, focused tools — many of them work entirely offline.

See our apps Who we are
01 — WHAT WE DO

We publish
our own apps.

Kumu Studio is not an agency and takes no client work. Everything listed on this page is a product we built and publish ourselves on the App Store.

iOS
iOS only
Every app we publish is a native iOS app written in Swift and SwiftUI. We do not publish on Google Play and we do not offer Android or cross-platform development.
SwiftSwiftUI
◎
Offline and private
Many of our apps run entirely on the device, with no account and no server. Each app's privacy policy states exactly what that app stores, where it stores it, and what it never collects.
No accountsPer-app policy
⌖
Local rules, done properly
Several of our apps calculate taxes, fees and deadlines under the published rules of a specific country. They are independent tools and are not affiliated with any government agency.
Published ratesSources cited
02 — APPS

Everything
we publish.

All 17 apps currently available on the App Store. Every entry links to its live App Store page and to its privacy policy.

17
APPS ON THE APP STORE
10
APP STORE CATEGORIES
2026
PUBLISHING SINCE MAY
Lifestyle
Tafsir AI — Islamic Dreams
Describe a dream in your own words — typed or spoken — and read what the classical Islamic books of dream interpretation say about it.
App Store ↗ Privacy
Lifestyle
Bible Dream: Joseph & Daniel
Reflect on your dreams in the light of Scripture, from Joseph to Daniel — rooted in the Word, never fortune-telling.
App Store ↗ Privacy
Books
Tehillim & Siddur: Zmanim
All 150 chapters of Tehillim with vowels, a full siddur, zmanim and the Hebrew calendar — works offline.
App Store ↗ Privacy
Health & Fitness
Jiva — Ashtanga Yoga & Breath
One daily ritual: two sutras to read, two pranayama practices to breathe, one ashtanga program to hold.
App Store ↗ Privacy
Health & Fitness
UPF AI: Processed Food Scanner
Scan a barcode and see in seconds how ultra-processed a product is, graded on the NOVA 1–4 scale used in nutrition research.
App Store ↗ Privacy
Finance
BPJS & Samsat: Pajak Gaji
Indonesian vehicle tax, BPJS contributions and net salary, computed on your phone — no account, no login, no server.
App Store ↗ Privacy
Finance
Consulta RUC & SUNAT Perú
Check any RUC or DNI instantly, track every SUNAT deadline and the daily exchange rate — without a Clave SOL login.
App Store ↗ Privacy
Business
Faktury KSeF i ZUS
Warns you before a KSeF invoice, a ZUS contribution or a PIT deadline turns into a penalty or a lost relief.
App Store ↗ Privacy
Finance
Japan Mortgage Calculator
Japanese home-loan simulator: monthly payment, annuity or equal-principal, bonus payments and early repayment.
App Store ↗ Privacy
Finance
Receipt JP — Expense Scanner
On-device OCR reads any Japanese receipt — store, date, total, 8%/10% tax and the T-number. No internet, ever.
App Store ↗ Privacy
Photo & Video
Teleprompter — Script & Video
Scrolls your script over the camera view while it records, so you keep eye contact instead of memorising.
App Store ↗ Privacy
Photo & Video
Video Compressor: Shrink
Compresses video on the iPhone down to a target size for WhatsApp or email. Nothing is uploaded.
App Store ↗ Privacy
Navigation
Dashcam: Drive Recorder
Always-on drive recorder: looping clips, crash detection and turn-by-turn navigation that never stops the camera.
App Store ↗ Privacy
Books
Fastbook: Speed Reader
Shows a book one word at a time (RSVP) so you stop subvocalising and back-skipping, and read faster.
App Store ↗ Privacy
Music
Metronome: Tap Tempo & Beats
A calm, precisely built metronome with rock-solid timing, made for daily practice on any instrument.
App Store ↗ Privacy
Utilities
Chess Clock: Board Timer
Sudden death, Fischer, Bronstein and US delay — a fast timer for chess and every board game.
App Store ↗ Privacy
Games
Jass — Schieber & Coiffeur
Play authentic Swiss Jass with the 36-card deck: solo against three bots offline, or online with a friend.
App Store ↗ Privacy
03 — ABOUT

A very small
studio.

01
Who runs it. Kumu Studio is the trading name of KUMU STUDIYA, OSOO, a company registered in the Kyrgyz Republic.
02
How the apps are built. Our apps are developed in-house in Swift and SwiftUI, with AI-assisted tooling used during development and localisation. We reuse our own engineering foundations across apps; each one ships with its own data, its own rules and its own market.
03
How we make money. Only from the App Store: paid unlocks and subscriptions inside our own apps. We sell no services, we show no advertising inside our apps, and we share no user data with anyone. We do buy Apple Search Ads to promote them.
05 — CONTACT

Get in
touch.

Support for any of our apps, or anything else — one monitored inbox, answered by a person.

Ready when
you are.

A question about an app, a bug, a refund, a privacy or legal request — write to us and a person will answer. We are a small studio, so it is always one of us.

EMAILkamil@kumu-studio.com COMPANYKUMU STUDIYA, OSOO · Kyrgyz Republic
06 — PRIVACY

Every policy,
in one place.

Each app states exactly what it stores, where it stores it, and what it never collects.

Tafsir AI — Islamic Dreams Bible Dream: Joseph & Daniel Tehillim & Siddur: Zmanim Jiva — Ashtanga Yoga & Breath UPF AI: Processed Food Scanner BPJS & Samsat: Pajak Gaji Consulta RUC & SUNAT Perú Faktury KSeF i ZUS Japan Mortgage Calculator Receipt JP — Expense Scanner Teleprompter — Script & Video Video Compressor: Shrink Dashcam: Drive Recorder Fastbook: Speed Reader Metronome: Tap Tempo & Beats Chess Clock: Board Timer Jass — Schieber & Coiffeur