Secure bitcoin on your own terms with an open source, multisignature wallet from BitPay.
Copay users can hold funds individually or share finances securely with other users with multisignature wallets, which prevent unauthorized payments by requiring multiple approvals. Here are some ways Copay can be used with others:

* To save for vacations or joint purchases with friends
* To track family spending and allowances
* To manage business, club, or organization funds and expenses

We built the following features into this version of Copay for a bitcoin wallet that doesn't compromise on security or accessibility:

* Multiple wallet creation and management in-app
* Intuitive multisignature security for personal or shared wallets
* Easy spending proposal flow for shared wallets and group payments
* Hierarchical deterministic (HD) address generation and wallet backups
* Device-based security: all private keys are stored locally, not in the cloud
* Support for Bitcoin testnet wallets
* Synchronous access across all major mobile and desktop platforms
* Payment protocol (BIP70-BIP73) support: easily-identifiable payment requests and verifiably secure bitcoin payments
* Support for 150+ currency pricing options and unit denomination in BTC or bits
* Email notifications for payments and transfers
* Customizable wallet naming and background colors
* 6 supported languages (EN, JP, FR, ES, DE, RU)

Copay is free and open source software run on non-proprietary servers, so there's no need to rely on any company for continuous support. Anyone can review or contribute to Copay's source code on GitHub (https://github.com/bitpay/copay).