Bitcoin Keeper is a mobile wallet software that can be downloaded from the Google Play and iOS app stores. Keeper supports all major hardware wallets and offers intuitive DIY single and multisignature wallet coordination. Keeper also supports single hot wallet functionality and own node connections.
This video walks you through pairing Passport with Keeper in a 2-of-3 multisig setup. Keeper calls this the 'Hodler' plan. Written steps can be found below.