Henle has their own app and subscription, which is said to be pretty decent by some of my friends who subscribe. But its catalogue is basically within classical music, so not that much overlap with MuseScore, which has a large number of transcriptions of film/game/pop music.
For many pieces of film/game/pop music, you can't even find a place to buy the original sheet music. There might not be an original sheet music in the first place; let alone a fitting transcription for the instrument you are looking to play. What musescore.com offers, is largely built upon hobbyists' transcription efforts.
For many pieces of film/game/pop music, you can't even find a place to buy the original sheet music. There might not be an original sheet music in the first place; let alone a fitting transcription for the instrument you are looking to play. What musescore.com offers, is largely built upon hobbyists' transcription efforts.