I use this app on different devices. Ich find it to be a great source of Information when looking for new whiskies to try.
I added my collection to have an overview. It's useful when having friends visit for a whisky, and you can offer them a whisky to their taste.
Writing and reading reviews is the part of the app I enjoy the most. It's interesting to see different opinions on your favorite whisky, and what other tastes different people have.
Further, the dev team and support is very responsive and open to new suggestions or critique.
The one thing that's not yet optimal for this app is the relatively small user base, which makes detailed reviews a sight rarer than I would like it to be. But as the community grows and time goes by, this issue will fix itself.