You can try out Range Viewer and GTO Trainer for free. It’s enough to sign up at https://rangeconverter.com/users/sign_up and head to the Lobby to see all the available poker charts for each game type.
Each listed solution comes with a free GTO trainer demo. You can access it by clicking the “Play Now” button.
In My Lobby tab you will also find the fully functional online range viewer and GTO trainer for MTT 15bb Heads Up poker strategy.