Brick 3D is an offline 3D building-brick construction app for Android. Users place, paint, rotate and delete toy-style plastic bricks on a 32x32 baseplate in a 3D scene, build freely or follow built-in step-by-step sets (Race Car, Duck, Dog, Cat, Turtle) with a guided game mode, save and reload creations locally, and export their model as a PNG screenshot or a GLB 3D file. Interface languages: English, Turkish, Spanish, Portuguese, German, French, Russian, Arabic, Hindi, Indonesian. Monetization: there are NO ADVERTISEMENTS of any kind in this app — no ad SDK is bundled at all. The only monetization is a single auto-renewing subscription, "Brick 3D Premium", sold at USD 2.99 per week through Google Play Billing (product id brick3d_premium_weekly). Premium unlocks 40 special parts (wheels, windows, doors, plants, roof pieces, minifigure pieces, decorative pieces) and premium sets. Everything else — all basic bricks, all colours, all sizes, the built-in sets, saving, PNG and GLB export — is free. Subscriptions are managed and cancelled by the user in their Google Play account; the app itself cannot cancel or refund. Purchase state is read from Google Play on the device; if the subscription lapses, premium content locks again automatically. There are NO user accounts, NO sign-in, NO registration. The app does not ask for name, email, phone number, contacts, photos, location, camera or microphone. It requests no runtime permissions. Creations are stored only in the browser-style local storage on the user's own device and are never uploaded. Uninstalling the app deletes all of them. Target audience: 13 and older. The app is a general-audience creativity tool and is not directed at children under 13. Trademark note: this app is an independent product. It is not affiliated with, endorsed by or connected to the LEGO Group or any toy manufacturer. No third-party brand names, logos or fonts are used in the app.