Questions that baffled me

https://www.owasp.org/index.php/OWASP_Mobile_Security_Project https://www.owasp.org/index.php/IOS_Developer_Cheat_Sheet https://www.google.co.in/search?q=how+secure+is+iOS+inherently&rlz=1C1TSNF_enUS419US419&aq=f&oq=how+secure+is+iOS+inherently&sourceid=chrome&ie=UTF-8#hl=en&rlz=1C1TSNF_enUS419US419&sclient=psy-ab&q=how+secure+are+mobile+wireless+networks&oq=how+secure+are+mobile+wireless+networks&gs_l=serp.3..33i29i30l4.597344.607904.0.608802.44.31.2.7.7.4.1144.8847.0j2j15j4j1j1j2j1.26.0...0.0...1c.1.8.psy-ab.2nw9meXUNEo&pbx=1&bav=on.2,or.r_cp.r_qf.&bvm=bv.44990110,d.bmk&fp=33754864b7cede&biw=1639&bih=737 https://www.google.co.in/search?q=How+secure+is+my+mobile+data+connection&rlz=1C1TSNF_enUS419US419&aq=f&oq=How+secure+is+my+mobile+data+connection&sourceid=chrome&ie=UTF-8#hl=en&rlz=1C1TSNF_enUS419US419&sclient=psy-ab&q=Developing+Secure+iOS+Apps&oq=Developing+Secure+iOS+Apps&g...

Google publishes a dashboard at http://developer.android.com/about/dashboards/index.html

Look at the 4 Best Practices tabs. There is a lot of good stuff there https://developer.android.com/training/index.html