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How does Copay work? Copay a Bitcoin wallet that isn’t an account service. Secure your personal funds with multiple signatures, or just one. – Don’t trust anyone with your savings. Like a joint-checking account, your Copay wallet can have multiple users. To send money, the group approves each transaction. – Manage shared money with friends or coworkers. Your child can have a wallet shared with you and introduce bitcoin to them. Copay makes sharing a wallet simple and secure. NO MORE TEDIOUS ADDRESS MANAGEMENT The Copay app securely stores multiple, distinct bitcoin wallets, allowing both business and privacy-conscious users to keep funds carefully separated. Manage personal, business, and testnet wallets easily, all without leaving the app. Copay uses hierarchical-deterministic (HD) wallets, allowing for secure in-app wallet generation and backup. SECURE VERIFICATION OF PAYMENTS Copay was one of the first wallets to accept the full Bitcoin Payment Protocol. Copay securely verifies the transaction when you send money via Payment Protocol to merchants. TESTNET SUPPORT TO DEVELOPERS Copay offers native support for Bitcoin Testnet. This allows you to test new bitcoin applications on multiple platforms. Copay makes it easy for developers to test, demo and deploy bitcoin applications. It supports multisignature (P2SH), multiple wallet support, and is a great way to get started. OPEN SOURCE, ZERO EXCEPTIONS The Copay app is open source as is the server. Enterprise and power users can fully control their finances with their own Copay apps and Bitcore Wallet Service. Dozens of bitcoin developers have already contributed to Copay, and we're not finished yet. Each part of Copay, including the wallet and server are open to review, improvement, and development by the community.