Strike is an instant payment app similar to Venmo or Cash App.
Simply put, U.S. dollars turn into bitcoin, and bitcoin turns into any fiat currency you want on the other end.
Currently, the Strike app is available in the United States (excluding Hawaii, New York, and South Dakota), El Salvador, and Argentina.
About The Lightning Network
The Lightning Network is built as a second layer above the Bitcoin base chain to facilitate fast transactions with low fees. Bitcoin is the currency used in both, but Lightning transactions are often denominated in satoshis (one hundred millionths of a single bitcoin).