● Start · Tools and accounts

Requirements
tools, accounts, keys.

What to install on your computer, what to sign up for online, which API keys you need, and what running the product costs.

On Windows

The commands on this page are written for macOS and Linux shells. On Windows, run them in Git Bash or WSL, where they work as written. In PowerShell, set a variable with $env:NAME="value" instead of export. Flutter, Node.js and the Firebase and FlutterFire CLIs run natively on Windows; iOS and macOS builds need a Mac.

01Tools on your computer

Tool	Version	Why
Flutter SDK (includes Dart)	3.41.3 or newer, stable	Builds both apps. Both need Dart 3.11.1+, which first ships with Flutter 3.41.3. Install
Node.js	22 LTS	Builds and deploys the Cloud Functions (`functions/package.json` pins Node 22).
Firebase CLI	13 or newer	Deploys rules, Remote Config, functions and hosting. `npm install -g firebase-tools`
FlutterFire CLI	latest	Connects the apps to your Firebase project. `dart pub global activate flutterfire_cli`
Xcode + CocoaPods	Xcode 15+, CocoaPods 1.14+	iOS builds. Needs a Mac.
Android Studio	current stable	Android SDK, emulator and the `keytool` command.
Google Chrome	current	Runs the admin panel locally.

Check everything at once. Lines for platforms you don't build for may stay yellow.

flutter --version
flutter doctor
node --version      # v22.x
firebase --version
flutterfire --version

02Accounts

Account	Needed for
Firebase project on the Blaze (pay-as-you-go) plan	Everything. Cloud Functions and Secret Manager need Blaze.	Required
Apple Developer Program	App Store, TestFlight, iOS in-app purchases, iOS push	For iOS
Google Play Console	Google Play, Android in-app purchases	For Android
Vercel, or any static host	Hosting the web wallet or the admin outside Firebase	Optional

Wallet apps in the stores

Apple accepts crypto wallet apps only from developers enrolled as an organisation (guideline 3.1.5). Enrol your company, not a personal account, if you plan to publish on iOS.

03API keys

All keys are free to start with; paid tiers only matter when you grow. The exact variable names and where each one goes are in Configuration.

Provider	Used for
Reown (WalletConnect)	Connecting the wallet to dApps	Required
0x and / or 1inch	Live swap quotes on EVM chains, and the swap fee you earn	For swaps
Alchemy, Helius, Moralis	Faster RPC, Solana data, NFT data	Recommended
Etherscan-family explorers	Transaction history per chain	Recommended
Transak	Buy crypto with a card	Optional
Anthropic	The optional Portfolio Brain PRO feature	Optional

04What your users can run

Platform	Minimum	Notes
iOS	iOS 15.5	Set in the Xcode project.
Android	API 24 (Android 7.0)	Flutter's default, never below 21 (`android/app/build.gradle.kts`).
macOS	macOS 10.15	Wallets are kept in the login keychain (no keychain entitlement needed). Sign release builds with your own Apple certificate; Firebase sign-in (PRO, crypto payment, Portfolio Brain, push) also needs the Keychain Sharing capability with your team (FAQ).
Web	Current browsers	Store subscriptions do not exist on the web; sell PRO with the crypto payment or grant it by hand in Admin → Users. The crypto PRO payment is shown on the web and in macOS builds made with `DIRECT_DISTRIBUTION=true`, never in the iOS and Android apps or a Mac App Store build. There is no Face ID or fingerprint in a browser: the user sets a vault passphrase of at least 10 characters before creating or importing a wallet, and types it again to unlock the browser and before a sensitive operation: revealing the recovery phrase, and every signing — sends, swaps and WalletConnect requests, whatever the amount (details).

The admin panel is a web app only.

05Running costs to expect

Firebase Blaze usage: functions, database reads and writes, hosting. Small projects usually stay low; set a budget alert.
Paid API tiers once you pass their free limits.
Apple (yearly) and Google (one-time) developer fees.
Store commission on subscriptions.