Blockstream App has integrated the Lightning Network to enable fast, cheap bitcoin-denominated payments. Once a channel has been opened to the network via the base blockchain, bitcoin payments made via Lightning are practically free.
Receive bitcoin on Lightning
1. To receive bitcoin on Lightning, begin by navigating to the "Transact" tab. Then, tap the "Receive" icon found in that tab.
2. On the next screen, switch the receiving asset from "Bitcoin" to "Bitcoin (Lightning)" in the "Asset" section near the top of the screen.
Send bitcoin on Lightning
1. Start by moving to the Transact tab via the navigation bar at the bottom of the app. Then, tap the "Send" option found between the Total Bitcoin Balance and the transaction history.
2. On the next screen, choose to scan a QR code associated with a Lightning invoice or paste the invoice into the text box.