App for exam copy checking

We "Zschool Tutorials" are a coaching institute for classes 8th to 12th . We need an app to do the checking and grading of subjective answer sheets submitted by students. The details of which are described in the following steps: 1. Student does the test work, login to app, uploads pics then a inbuilt software convert it to pdf or make a slide, student then uploads to document storage and app sends link/notification to particular class teacher. 2. Teacher clicks on the link/notification from app, accesses the document, uses inbuilt pdf or slide editing functionality ( making notes in handwriting mode, entering and highlighting text ) to check the paper, and submit the document. Also, a small module to calculate/store marks/grade etc. 3. Post submission, checked copy gets uploaded to same document storage in some coordinated fashion wrt original copy and student gets notified with result/checked copy with notes. 4. Summary Functionality for both sides. • For student, summary of all the work he did and submitted, with results, and links to access • For teacher, its summarised per student, summarised per assignment, and summarised overall. This is the basic idea which we want to get implemented in the app.