PokerTracker4 has 30 day free trial as well .They are very similar try them both see what you like best also if you only play at pokerstars there is one some pros use called Jivaro . Ive never used it as I play at multiple sites
ICM can not open together with pokerstars nor equilab, but both helps to understand betting value! hr2 helps you make decisions at the tables because it shows the way players are playing against you!
Programs on PS have to be careful. Some are prohibited, others are allowed only when PS is closed. For statistics it is better to use Holdem Manager 2.