Like many people that tried to play for free I rushed towards training camp lvl 13 to finally be able to train my very own 4* heroes. I figured the chances weren’t high and that was perfectly okay with me anyways -> can’t have it easy and free . I’ve stopped trying once i hit 50 tries (51 actually, but didn’t make a difference) without any 4s and figured I could at least post it here for people to get an idea of what they can expect. They’re all 3s and I put the chance of getting that colour behind them (at least based on my luck).
Yellow: 7 (14%)
Purple: 10 (20%)
Red: 6 (12%)
Green: 15 (30%)
As for a 4* I can only assume that the chance of getting one is less than 2%. Would love to see if other people had very different luck. If anyone is interested in which specific heroes i got in what order I can always provide a list ;).