DecorMuse

Inspiration

Most room-redesign apps show you someone else's beautiful room. We wanted the opposite: your actual room, with its odd window and awkward corner, reimagined. Mood boards don't help when you can't picture them in your own space, and hiring a designer for a single room is out of reach for most people.

What it does

Your room, redesigned. Take or pick a photo, choose a style (for example Organic Modern), and DecorMuse creates four redesigns of that room. The walls, windows and layout stay put; the furniture, materials and mood change.
Compare in place. Tap a design to slide it over your original photo with a before/after slider.
Refine it with Jenny. Chat with Jenny, your AI design muse: "make the walls darker", "swap the rug for jute", "warmer lighting". Jenny edits the design you picked instead of starting over. Each round includes up to 8 edits.
Go deeper. After your first round, five quick questions (what isn't working, how the room should feel, who lives there) tailor the next designs to you.
Boards. Every session is saved, so you can come back to a room and keep going.
Responsible by default. Every image is labeled AI-generated, every design has a Report button, room photos are deleted after 30 days, and you can delete your data from the app.

How we built it

App: React Native + Expo (TypeScript, Expo Router), released on Google Play.
Payments: the RevenueCat SDK (react-native-purchases) with a custom paywall, an offering with a monthly subscription and two round packs, and Restore Purchases. A signed RevenueCat webhook credits rounds on our server, idempotent on both event ID and store transaction ID, and the Rounds page shows the wallet and purchase history.
AI: Gemini 2.5 Flash Image redesigns the room from the photo; Gemini 2.5 Flash reads the room and interprets Jenny chat requests into precise edits.
Backend: a Python API that runs its AI tools through a private instance of Snippbot, our self-hosted AI agent platform, on the same machine. It's deployed on Fly.io with Litestream continuously backing up the SQLite ledger.
Team: the app was built by Sai working with a swarm of AI agents (developer, designer, PM and QA roles) coordinated in Snippbot.

Challenges we ran into

Keeping it your room. Image models love to "improve" a room by moving windows or changing the ceiling. Every edit is sent with your original photo as a geometry reference, and each render is aligned back to the source photo, so the architecture stays put and the before/after slider lines up.
Fair billing for AI that can fail. A round's credit is held before generation, kept only if designs actually arrive, and returned automatically on any failure.
Cost safety. Image generation costs real money per call, so the server enforces per-device, per-IP and daily spend limits that a single abusive client can't get around.

What we learned

People don't want more inspiration; they want to see their own space changed. And honest pricing (rounds, not per-image charges, plus automatic refunds) makes people comfortable trying a paid AI feature.

Judges: how to test

Install DecorMuse from Google Play. There's no sign-in.
Every new install gets 2 free design rounds. Take a photo of any room (or use a photo from your gallery), pick a style, and wait a minute or two for four redesigns.
Tap a design to compare it with the slider, then open Chat with Jenny and ask for a change ("make the walls darker").
Open Rounds to see the wallet, the packs and the subscription, all sold through RevenueCat.