kirin@delta:~$ whoami

We build our own apps, then keep them running.

Kirin Delta Hub is an independent product house in Cluj-Napoca, Romania. We publish our own apps for iOS and Android, and build apps and websites for other teams. Small, fast, and maintained long after launch.

See what's shipped Get in touch

01 Delta log

What we've shipped.

A product house is only as good as its release history. This is ours.

2026.04BETA

DeltaBooks

A shared book library for couples. Scan a cover, add it to a library you both own, rate and comment on what the other one read. Bilingual English and Romanian, on iOS and Android.

Libraries two people own together, with per-member permissions
Barcode scanning that fills in the cover, author and page count
Ratings, reviews and comments you can leave on each other's books
Reading stats and a wishlist that stays in sync

iOS & AndroidShared librariesBarcode scanningReading statsEN / RO

Platforms: iOS, Android
Languages: English, Romanian
Status: In beta

// the next entry is being written

02 Client work

Apps and websites for other teams.

The other half of the studio. What we learn building our own products goes into the work we do for everyone else.

Mobile apps

iOS and Android from a single codebase, released to both stores on the same day.

Native feel on both
One release, not two
Runs on older phones

Websites

Sites that stay fast and readable on every screen, from a folded phone to a desktop monitor.

Tested from 280px up
Built to be found
English and Romanian

After launch

Shipping is where the work starts. Fixes, updates and keeping the thing online once it is live.

Bug fixes
OS and browser updates
Kept online

03 Craft

What everything we build has in common.

Different projects, same standards, whether it's the first release or the fortieth.

Mobile and web

iOS and Android, together
Websites on any device
Works on older hardware

Fast and small

Opens instantly
Light on battery and data
Tolerates bad signal

Your data, yours

No ads, no trackers
Nothing sold on
Export any time

Made for two languages

English and Romanian
Local dates and units
More on request

04 Process

How a release actually happens.

No roadmap theatre. Four steps, repeated until the thing is worth installing.

Start from the problem
Our own products begin as something we needed and couldn't buy. Client work begins with what the app or site is actually for, not the feature list.
Smallest version that's genuinely useful
One screen that works beats ten that nearly do. The first release goes out when it is worth using, not when the list is finally full.
Ship everywhere at once
Apps reach both stores the same day with the same features. Websites go live already tested on phones, tablets and desktops.
Then we live with it
Shipping is the start of the work. Bugs get fixed, apps keep up with new OS versions, sites keep up with new browsers, and everything stays online.

05 Studio

A small studio in Cluj-Napoca.

Who you would actually be working with.

We have been building software professionally for years. Most of what that buys is judgement: knowing which shortcuts cost you later, and which ones never matter at all.

Every project starts with the market it is going into. Who is already there, what they charge, and what their users complain about. We would rather spend the first week on that than ship something confident and wrong.

And we only take on work we actually want to build. This is a small studio. There is nowhere to hide a project nobody cares about.

Founded: 2026Founded
Based in: ClujBased in
Platforms per app: 2Platforms per app
Ads or trackers: 0Ads or trackers

06 Contact

Something you want built with us?

We read everything. Partnerships and product ideas get a reply within a few days.

An app or website you need built
Something broken in one of our apps
Press, or anything about the company

hub@kirindelta.com