Thank you to the over 300,000 people who have downloaded Chem Pro! We are honored to produce this app for you and love hearing your feedback.Version 3.1.3 includes:- iPhone 6 and 6 Plus support with full support for iOS 8 on older devices- Lessons now download in 720p for iPhone 6 and iPhone 6 Plus- Edge swiping is now enabled for iPhone 6 and iPhone 6 Plus- The ability to delete downloaded lessons. Simply swipe to the left in the Lessons tab.- Expanded polyatomic ions flash card sets - now includes 42 polyatomic ions- Bug fixes and UI tweaks