Costra AI

<br>Costra tells you exactly what to buy for your renovation — and how much of it.<br><br>Pick a room, answer six short steps, and get a complete, layer-by-layer bill of materials: primer, plaster, putty, paint, tile adhesive, screed and more — each with the exact quantity for your walls, floor and ceiling.<br><br>NO SIGN-UP NEEDED<br>Calculate and view full estimates as a guest. Create a free account only if you want to save them.<br><br>HOW IT WORKS<br>1. Room — choose the room type and enter its dimensions<br>2. Condition — describe wall evenness and floor screed, and watch the estimated material weight update live<br>3. Walls, floor, ceiling — pick your finishes: paint, wallpaper, tile, laminate and more<br>4. Result — a structured materials list, grouped by surface and layer<br><br>SMART WHERE IT MATTERS<br>• Quantities follow professional consumption rates and your room&#39;s real geometry — doors, windows, wet zones<br>• Every line shows the right unit: kilograms, liters, square meters, rolls, pieces<br>• Tap any material for a hint explaining what it&#39;s for<br>• Diagrams show how the layers stack up<br><br>SAVE AND ORGANIZE (optional, free)<br>• Save estimates to your account and reopen them anytime<br>• Group estimates into projects — an apartment, a house, a client job<br>• Duplicate an estimate and tweak it for the next room<br><br>IN YOUR LANGUAGE<br>Fully bilingual English/Russian with an instant toggle.<br><br>Costra is free, with no ads. Your data stays yours — you can delete your account and everything in it at any time, right in the app.<br>