they use liquid and boltz swaps there is a bit of a privacy leak on the electrum server side, but you can set your own, and privacy trust with boltz open source, incredibly easy to use, decent default privacy guarantees

Citadel Dispatch

CD181: FRANCIS POULIOT - BULL BITCOIN SELF CUSTODY BULL WALLET

Francis is the Founder of Bull Bitcoin, one of the best bitcoin brokerage services. They recently launched a self custody mobile wallet on ios and ...