I’ve been using Keitaro since 2017 and is my go-to tracker. I highly recommend it.
One of the things I like the most is the way you can arrange the metrics on your reports (multi-level grouping); you can check all the metrics you want up to 30 if I’m not mistaken.
One thing missing though is the lack of marks/icons like the ones you see in other trackers like Bemob when optimizing (to know what you've paused).