This page is for an offline DESKTOP/LAPTOP version, not mobile. To vote for a mobile app, see: https://noteflight.uservoice.com/forums/4962-tell-us-your-thoughts/suggestions/4327326-ios-and-android-apps-instead-of-accessing-throughBryan Alvarez commented
Another vote for a desktop version of Noteflight. I use one of the premium versions for my classroom, personal use, etc. I'm currently arranging a section from Prokofiev's Romeo and Juliet for my wedding--my score is only 9 instruments and 50 bars long and it's getting REALLY laggy. I'm only half way through the transcription and wishing I'd started it in Sibelius instead. It's taking 5 seconds sometimes just to delete a note. Otherwise, Noteflight is my go-to for composition, transcription, and arranging. It's also my preference for classroom teaching.