Mobile apps
iOS and Android apps from idea to the App Store and Google Play, including Apple Watch and Wear OS.
- iOS · Android
- Apple Watch · Wear OS
- App Store · Google Play
I scan ideas. I deliver apps.
I'm Jakub. I build and run apps that live in the App Store and Google Play. Move your cursor across the room to see how one of them works.
Scan your ideaScroll to keep scanning
Decoria.Studio
Promise
You scan a room with your phone, see it in a new style and get a list of real products with prices.
Build plan
LiDAR and ARCore scanning, an AI render that keeps the dimensions, product matching. iOS and Android, PL and EN.
Football Trainer
Promise
A young footballer trains with step-by-step videos, collects points and competes in leagues with friends.
Build plan
Phone, Apple Watch and Wear OS, Bluetooth heart-rate monitor and GPS, 7 languages, over 150 video workouts.
Your app
Promise
Nothing here yet. Describe your idea in a few sentences.
Build plan
A 30-minute call, then scope, timeline and price in writing. A test build every week.
What I build.
Mobile apps are my main focus, but the same process works for websites and other digital projects.
Websites
Company sites and sites that bring in enquiries: fast, bilingual, with contact that works. The site you are reading is an example.
- PL + EN
- Fast on mobile
- Domain and email
Other projects
Dashboards and internal tools, integrations, automations. I can also run your IT project: managing projects is my profession.
- Dashboards and tools
- Integrations and automations
- Project management
Scan reports.
Two apps I built from idea to store and still develop. Every reading is real.
Decoria.Studio
An AI interior designer. Scan a room, get a render in your chosen style and a shopping list with quantities and prices that fit your budget.
- 43%of users dropped off at sign-in, so I introduced guest mode.
- 60%of scans failed, so I added a guide and manual measurements.
| Platforms | iOS, Android |
|---|---|
| Languages | PL, EN |
| Markets | Poland, USA, Canada |
| Version | 1.1.2 |
| Tech | LiDAR, ARCore, AI render |
| Model | One-off packs, affiliate |
Football Trainer
Training for young footballers: step-by-step videos, points, rankings and leagues with friends. Heart rate and distance straight from the watch.
- 3free workouts a day instead of a locked catalogue.
- 1.21the Bluetooth heart-rate monitor works without location access.
| Platforms | iOS, Android, Apple Watch, Wear OS |
|---|---|
| Languages | 7 |
| Workouts | 150+ videos |
| Version | 1.21 |
| Tech | Bluetooth, GPS, health |
| Model | Free with ads, Premium |
How I scan an idea.
Four phases, the same as in Decoria: measure, floor plan, render and list. At every stage you know what you will get and for how much.
- Phase 1
Measure
A free 30-minute call. I check whether and how your idea can be built.
- Phase 2
Floor plan
Scope of the first version and a clickable prototype. Price and timeline in writing.
- Phase 3
Render
Built in weekly stages. A new test build on your phone every week.
- Phase 4
List
Release on the App Store and Google Play, then ongoing care. The code and accounts are yours.
Meet Jakub.
I'm Jakub Szczybiełkiewicz. For more than ten years I have managed projects and teams, the last four on international e-commerce and IT programmes: platforms for global brands across six markets, a mobile app released to both stores, budgets and steering committees.
JS Technology is where I build my own products. Decoria.Studio and Football Trainer are live in the App Store and Google Play, and I run them myself: I watch the numbers, fix what hurts users and ship the next version.
You get a project manager and a maker in one person: I watch scope, price and deadline, and I build the app myself. Everything in writing. A working version every week. I use AI to move faster, and I review every change myself. The code and the store accounts are yours from day one.
Tell me about your idea| Experience | 10+ years in project and team management |
|---|---|
| Delivered | E-commerce platforms in 6 markets, a mobile app on iOS and Android |
| Qualified | Six Sigma Green Belt, postgraduate in project management |
| Based | Kiełczów, Poland · Polish, English |
AI scans faster. I answer for the result.
I build with AI, so I work faster and for less than a software house. The decisions and the quality control stay with me.
- Every change reviewedI read and test every piece of code on real phones before it goes into your app.
- You see progress every weekA short video, a test build to install and a list of what is next.
- Everything is yoursCode, store accounts and data from day one. You can walk away at any time.
Scan your idea.
The more you write, the more precise the scan. I reply within one business day.
Questions before the scan.
Why is the price lower than at a software house?
I work alone with the help of AI, without the cost of an office, sales reps and layers of management. You pay for the app, not for a company structure.
Is code written with AI safe?
I review and test every piece. I apply the same security rules as for hand-written code.
What technology will you build the app with?
I choose it to fit the idea: an app with a watch is built differently from a shop. I will tell you why before we start.
Do you work with clients outside Poland?
Yes, in English and in Polish. Decoria is already live in the USA and Canada.