Poker range trainer allows you to define your ranges based on your position and your oponent poisition.
You can save it, check on it later on and even better you will be able to train on it !!!
Poker range trainer will generate situation based on the saved ranges and let you choose the correct action that match your strategy, i.e your ranges, and tells you if you are right or wrong!
To be more precise, it will only generate situation against defined ranges, so if you want to train on one specific range, then save only this one and you will be able to train hard on it!

You can also do it all the way around, starting from your pocket cards to check what you planed to do against vilain position.
It is called the "Check my hand" and can be of some use to remind how to play a pocket hand against the context.
Basically, given your position, you select the cards reflecting your hand and you will have the action to be performed in front of each possible vilain position you are facing!