PlayScore for iOS and Windows supports standard percussion/drum notation on a normal 5-line staff using the percussion (neutral) clef.
Clefs other than the percussion clef play in the piano sound by default but percussion staves always play as percussion. PlayScore uses standard conventions for assigning individual percussion instruments to specific staff lines and spaces. For example, notes on the second space from the top play as snare drum.
Percussion staff volume works slightly differently than other staves. On the staves screen (button lower left) , the volume for all percussion staves is adjusted using a single control at the bottom of the screen. Even if the music has several percussion parts there is only a single control for them all. This limitation arises from the way percussion is handled by the MIDI standard.
Percussion notation will be reflected in an exported MusicXML file with standard instrument assignments.