1. An internet connection is required for a first installation on your Android phone.
2. If you receive any rejection message on your phone, go to Settings --> Application Setting; check the box for allowing installation of non-market applications.
3. Tips #4, #6 and #7 under the topic "Differential Equations" in A Level Mathematics Quick Tips Part 2 are not included within the current H2 Maths syllabus; they have however been presented in the app to cater to UK students taking the Further Pure version of the A Level examinations.