Premix is a simple easy to use app which allows you to quickly determine the amount of oil you need mix with your fuel based on the desired fuel to oil ratio. Many 2-Stroke engines in lawn mowers, chainsaws, line trimmers, boat outboard motors, motorcycles, snowmobiles, and other devices require oil to be mixed with fuel in a ratio specified by the manufacturer. Take the guess work out of using your two-stroke engine with Premix.
For those asking about issues with the slider and locking in proper values, here's a shortcut: Just tap the "+" and "-" on the ends of the slider to fine tune the mix ratio. This will increment and decrement the slider value. Enjoy!