A multiplayer music party game, from card deck to both app stores.
Soundcards started life as a physical card game. Its founder wanted the same social music experience in everyone's pocket. We designed and built the game in Flutter for iOS and Android, with real songs from Spotify and SoundCloud, four ways to play, AI players, online matchmaking, subscriptions and the website that introduces it.
- Client
- Soundcards
- Industry
- Music & Games
- Location
- United Kingdom
- Platform
- iOS & Android (Flutter)
Soundcards is a social music party game: one player is the Judge, draws a genre card like “Breakup Songs” or “Best Chorus”, and everyone else races to submit the real song that nails it. The Judge listens blind and crowns a winner. We turned that idea into a complete mobile game, handling product and game UX, Flutter development, the Firebase back end, music integrations, multiplayer, safety, subscriptions, store launch and the marketing website.
- One Flutter codebase shipping to the App Store and Google Play
- Four play modes: pass-the-phone, online match, private rooms and AI practice
- Real music search with Spotify and SoundCloud and in-app previews
- Soundcards Plus subscriptions, referral rewards and player safety tools
The build, by the numbers
Ways To Play
4
Soundcards At Launch
89
Players Online Per Game
13
Platforms, One Codebase
2
One game that works in the room and across the world
A music party game lives or dies on its pace. Soundcards had to feel effortless with friends passing one phone around a table, and just as smooth with strangers playing online in different countries. Every round needed a card, a timer, song search, anonymous submissions, blind judging and a winner, without the technology ever getting in the way.
On top of the core loop, the product needed real music rather than multiple choice, a way to play without a full group, fair judging, safety for public online play and a subscription model that let people try the game before paying.
Local and online in one app
Shared-phone handoffs for parties, and synchronised sessions and round state for online matches.
Real songs, fast
Searching millions of tracks and previewing them had to feel instant, mid-round.
Fair and safe play
Anonymous submissions, objections, reporting, blocking and name filtering for public matches.
Never short a player
The core loop had to work solo or with small groups, not only when a full table showed up.
A single Flutter build on a real-time Firebase back end
We built Soundcards in Flutter, so one codebase ships a native-feeling game to both iOS and Android. Firebase Authentication, Firestore and Cloud Functions run identity, data and the server-side game workflows that keep online rounds in sync: who is Judge, which card is live, how long is left, who has submitted and who won.
Song discovery connects to Spotify and SoundCloud, so players search real tracks, hear 30-second previews in the app and open the full song in their own music app. AI players draw, submit and judge alongside people, so Practice mode and short-handed games always work. RevenueCat powers Soundcards Plus with a free trial, weekly, monthly and yearly plans, plus referral rewards, while reporting, blocking and offensive-name filtering keep public play safe.
A full game across four functional areas
Gameplay
- Rotating Judge and genre cards
- Timed, anonymous submissions
- Blind judging and objections
- "You Decide" custom cards
Multiplayer & modes
- Pass-the-phone local play
- Online matchmaking
- Private rooms with invite codes
- AI players and Practice mode
Music
- Spotify and SoundCloud search
- 30-second in-app previews
- Open full song in your music app
- Favourite genres and top artists
Accounts, Plus & safety
- Soundcards Plus via RevenueCat
- Referral rewards
- Bronze to Diamond ranks
- Reporting, blocking and name filtering
Inside the app
A marketing site, not an afterthought
Soundcards needed somewhere to send people before they ever open the app: what the game is, how a round plays, the four ways to play and the plans. We built soundcardsgame.com alongside the game itself, sharing the same visual language.
A game that's launch-ready
Cross-Platform
One Flutter Codebase
Multiplayer
Local, Online & AI
Real Music
Spotify & SoundCloud
Monetised
Plus Subscriptions & Referrals
Shipped, published and ready to play
Soundcards is live on the App Store and Google Play, with 5 free games for every new player and a 7-day free trial of Soundcards Plus. We also built soundcardsgame.com, the website that explains how to play, shows the features and pricing, and sends visitors straight to the stores.
The services behind this game
- 01Game DevelopmentParty, casual and multiplayer mobile games built to launch.
- 02Mobile App DevelopmentThe Flutter build for iOS and Android.
- 03Flutter DevelopmentOne codebase, native-feeling apps on both stores.
- 04AI DevelopmentAI players for solo practice and short-handed games.
- 05Subscription PlatformsFree trials, plans and referral rewards.
- 06Website DevelopmentThe product website that drives store downloads.
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