Gradi KoJa

Are you building a house? Are you renovating an apartment? I know how much a headache craftsmen, materials and prices can be. That's why I made this app. Everything you need for smart construction is now in your phone. No more wasted money and no more missteps.

This is no ordinary app. This is your pocket tool that saves you both time and nerves.

What do you have in there?
Construction calculators: Forget about pen, paper and approximate methods. Enter the dimensions and immediately find out exactly how many silicate blocks, tiles, insulation, glue or squares of natural stone you need. The calculation is clear, black and white.

AI Koja - Your handyman in your pocket: I've put over 15 years of my construction site experience into this chat. You ask me whatever is bothering you about construction. You don't know whether to put Styrofoam or PIR boards? Are you wondering how to properly build and install insulation? You type in a question and you immediately get a specific answer. I am explaining to you in the vernacular, simply and directly, just as I would say to you while we are standing on the scaffolding. No complicated words, just clean and useful advice.

Help at the warehouse: Check calculations and tips while buying materials. Don't let them sell you excess or what you don't need.

Who is this for?
For everyone who wants to build smart. It doesn't matter if you are just planning your first house and starting from the meadow to the roof, or if you are already an experienced craftsman who wants to speed up the work.

Download the app. Save money on materials, avoid costly mistakes and get the job done right.
Let's build!