Health and lingots???
I've been doing Duo for 3 yrs. I've seen the changes in the program and like most of them. I'm not so sure about the new ones! I've heard some complain about "health" What is it? I don't seem to have it on my program. I hope Duo straightens out the latest changes. Also, WHAT are the lingots good for now? I've got 1700 of them!
Currently being tested on iOS only - and by about half the users.
You will still be able to use your Lingots on Android (in the short term) and on the web (in the long term).
usage of them was explained here
Gems and Health FAQ