This app was mentioned in 8 comments, with an average of 1.25 upvotes
The best educational game I have found on android is this one: https://play.google.com/store/apps/details?id=com.aceedventure.chemcaper.act1
This is the best educational game for android but it is not free: https://play.google.com/store/apps/details?id=com.aceedventure.chemcaper.act1
This one is a really really hidden gem: https://play.google.com/store/apps/details?id=com.aceedventure.chemcaper.act1
Looks good but this is the best educational game for android IMO: https://play.google.com/store/apps/details?id=com.aceedventure.chemcaper.act1
Linkme: Witchspring
Also: https://play.google.com/store/apps/details?id=com.aceedventure.chemcaper.act1