KNKuba Nowacki
Available for new app projects — Q4 2026

I build and ship mobile apps.From first commit to the App Store.

Freelance React Native engineer. Six of my own iOS and Android apps are in the pipeline right now.

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Apps in the pipeline

Six apps I'm designing, building and shipping under KN Labs.

All work
Undesk
UndeskApp Store

Desk stretches that fix what hurts in 2 minutes.

iOS · Androidgetundesk.app ↗
Tally
TallyTestFlight

Log an expense by voice, straight from the lock screen.

Circa
CircaTestFlight

Plan your day around your energy, not against it.

Tabby
TabbyIn development

Split the bill and get paid back by BLIK. Friends need no app.

iOS · Androidgettabby.pl ↗
SlotFix
SlotFixIn development

Booking page and schedule for tradespeople.

iOS · Androidslotfix.pl ↗
Murvo
MurvoIn development

Job costing for small construction crews.

iOS · Androidmurvo.pl ↗

Selected apps

2026 · iOS · Android

Undesk

Desk workers get neck and back pain they could fix in two minutes, but generic stretch apps don't adapt. Undesk asks what hurts each day and Claude rebuilds a four-week plan around it. Out on the App Store now, with Pro access enforced on the server.

Expo · React Native · NestJS · Claude · RevenueCat

2026 · iOS · TestFlight

Tally

Logging an expense should take less time than paying. Say it from the lock screen and Tally turns it into an entry in under two seconds. Speech is recognised on the phone; only the transcript reaches the server. The widget and Live Activity ship through a custom Expo config plugin.

Expo · React Native · NestJS · Claude · Widgets

2026 · iOS · Android

Tabby

Most split apps ask every friend to sign up before they can pay you back. In Tabby only the payer has an account. Everyone else gets a link, pays by BLIK or bank transfer in the browser and taps “paid”. In development, with the waitlist open.

Expo · React Native · NestJS · MikroORM · Supabase · Astro

How I work

  1. 01

    Scope

    A short call, then a written plan: what we build first, what it costs, when it ships.

  2. 02

    Build

    A TestFlight build every week. You use the real app on your phone, not mockups.

  3. 03

    Ship to the stores

    App Store and Google Play submission, subscriptions, analytics. The code is yours, with no lock-in.

Before mobile

Web products I built and ran from 2024 to 2026. All closed now.

Full archive
Revoply2025
Revoply

Replies to Google Reviews, written in your brand voice.

MakePrompt2025
MakePrompt

A studio for writing and versioning AI prompts.

Trust Badge2025
Trust Badge

Verified reviews with AI moderation and fraud checks.

HookScope2026
HookScope

Inspect webhooks live and forward them to localhost.

Gatedly2026
Gatedly

Open-source feature flags with gradual rollouts.

Pokoje Borowa2026
Pokoje Borowa

Reservations and admin for a mountain guesthouse.

Pokoje Borowa — Website2026
Pokoje Borowa — Website

Static info site for a mountain guesthouse.

E-commerce Management2024
E-commerce Management

Admin dashboard for products, orders and stock.

LawPilot2026
LawPilot

AI assistant for legal research and drafting.