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I have successfully used this app since last May and it has worked perfectly. When I updated my iPad to 15.3.1 there appeared to be some “improvements” such as a larger preview screen. After editing a 160 page document I realized it did not save ANY of my work ! I have contacted app support twice with no response. I notice they seem to respond to reviews - so here’s my review. Fortunately I have an iPad that I use for my everyday work that I had NOT updated to 15.3.1 and that still works fine. This does not make me feel better about losing 160 pages of work. I use this app for my side job of proofreading - using this app - which is a paid app - helps save a lot of trees !! I am hopeful the developers work to fix this bug of not saving notations!

Crashes every few minutes without reason , and needs to be rebooted, randomly deletes pages, replaces pages with duplicates of old pages (almost every scan), occasionally replaces pages with blank green pages, deletes scans randomly, also very slow taking pictures. App design is nice and if it actually worked it would be great, it's just buggy to the point of being completely unusable. maybe it's just my phone.. so bad with expansive price for🗑 product

I've used this for a while just to open and read PDF's, but since yesterday every PDF I open, new or already read in this app, gives a message saying that it's "not a PDF or is corrupted" which isn't true. Do I have to transfer PDF files to whatever new app I'll download, or will they just open in the new app when selected? I'm sorry TO THE PEOPLE WHO LOST WORK IN THE APP: See if your backup/restore is turned on and if you can restore the file to the date before the info was lost.