Hi StaticSnail,
Welcome to PokerStrategy.com 
If I'm going to actually play using a poker app, I have to trust it. If I'm going to trust it, somebody like PokerStrategy.com must endorse it. And to be fair, even PokerStrategy.com has partnered with some sites that became untrustworthy.
If it is an app that makes playing poker easier, or if it is an app that teaches poker principles, I'll give it a try, but I'm unlikely to just randomly install it without someone's recommendation.
Several members have created free poker tools in the past and posted them here. There was once even a poker tracker.
Check out this thread:
https://forums.pokerstrategy.com/forum/thread.php?postid=2002004#post2002004
All the best,
VS