By Sergey Mikhanov
Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus.
Price: Usually £2.99 but FREE for a limited time.
Scalar gives you an endless sheet of paper you can calculate on so you’ll never lose track again, even with the most complex calculations.
Follow the link on an iOS device or via iTunes on your PC: