My use case: I have to attend weekend lectures that run often run 10 hours long (with three or four 15 minute breaks for food etc). Video recording of the lectures is not allowed. But no body's there to check if someone is recording Audio. Since these lectures are delivered at firehose speed, there is too much material and too little time, classes are conducted in a hurried fashion and as a result written Notes are hurried too. When revising there's a loss of context at every second page especially if i open the notebook to revise the material few days later. My requirements: Any apps that do atleast the following- Lecture audio sync with handwriting Searches handwriting as text Additional but not so important feature for me: Ability to change handwriting to text. And one additional question, Can one record audio on onenote app in my phone and handwrite in iPadpro onenote app, and that audio later appears synced with my handwriting in onenote desktop programme? I know i can simply buy a surface pro 4, but i don't think that surface pro 4 can preserve my writing as legible (just 100-110 Hz of sampling rate as opposed to 240 Hz of iOS). Needless to say i am decided on iPadpro, it's just that i have not found the App that does what onenote full programme does. And i can not wait till Surface pro 5, chances are that will suck too when it comes to IAF and sampling rate.