It depends on what Android version you are running, it appears to not be available on the newest and the developer is uncontactable, none of the published email address's work anymore, all mail bounces back.
I use to love this app, My probelm started when i upgraded from Gs3 to the Gs4. I monitor my pool and three other friends pools, these are all BTCguild. BitCare use to allow for multiple api accounts for the one pool, no other monitoring app i have looked at allows this, jsut one key per pool. This leaves me suing 4 different applications to monitor the accounts i need too.
I would love someone to recreate this application with S4 compatibility - would happily pay for the development