Ive used this app for all major features it offers; splitting, deleting single pages and merging. Everything works like it should. When doing a split of a big document you have to prevent the phone from going to sleep mode (touching the screen every few minutes will work) In case your phone went to sleep mode while PDF processing, the app might crash. But thats not a big issue. Great work guys!
glumos82 about PDF Tools - View, Store, Merge, Split & Password Protect PDFs, v1.0.3