calculation lost when app goes background/killed

[tleydxdy]

my phone don't have a lot of memory so background apps constantly gets killed. this causes issue with the calculator since when I switch back all the numbers entered are lost

[apesic]

Thanks for the report--I was worried about this possibility when I first wrote the app so it's useful to know that it is indeed a problem in the wild (I think my phone keeps it alive long enough I don't notice this shortcoming too often).

I think some sort of simple persistence should be easy enough to implement, I'll plan on including that in the next version.