I've used Merlin for a while and I'm still impressed by Merlin's sound identification, it continues to inspire me.

I wrote about it last year: https://digitalseams.com/blog/what-birdsong-and-backends-can...

It's Pokemon for old people, I love it and use it at least once a day. Personal best for a dog walk - 23 different birds, personal best for sitting in the garden drinking my morning coffee - 17 birds.

My family got a little tired of me using it on holiday in Portugal, but in my defence there were a lot of new birds I needed to add to my collection.