[have_faith]

iNaturalist is great for logging observations (their iNat Next app is their new one).

They also have an app called Seek that I think is more aimed at kids, but it comes with trophies and streaks and stuff like that.

[yaky]

Seek is impressive just for the sheer number of completely different things it could identify, from mosses to animals. I used it to find native and invasive plants in my garden.