Here comes the official Bitcoin wallet app for the Windows phone: Bitpay

Finally, this is Bitcoin time for the Windows phone users. Popular Bitcoin Wallet service launched their all new official Bitcoin wallet and exchange app for the Windows phones.

Features of the app:

Multiple bitcoin wallet creation and management in-app
Integration for loading, managing, and spending the BitPay Visa Card.
Integration for buying and selling bitcoin.
Integration for buying Amazon.com gift cards.
Intuitive multisignature security for personal or shared wallets
Device-based security: all private keys are stored locally, not in the cloud
Hierarchical deterministic (HD) address generation and wallet backups
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 and push notifications for payments and transfers
Easy spending proposal flow for shared wallets and group payments
Integrates with hardware wallets like Ledger and TREZOR.
Support for Bitcoin testnet wallets
Customizable wallet naming and background colors

With the BitPay Wallet, your private keys and your money remain in your control at all times. And you’re using code that’s 100% open source for community testing and audits. Download it now.