Coffee Calculator Lite for Android
When "Normal" is chosen, the recommended dosage of coffee is very close to what the SCAA recommends, which is quite strong unless you are a "coffee connoisseur" When "Weaker" is chosen, it's very close to what I typically use to make coffee, which is actually quite strong for a lot of people's standards. This ratio is considered a "standard" strength, and I use a chart to get a similar ratio when measuring my coffee. With that said, this is the only app that I've come across so far that seems to have some actual logic in the formula. The pro version has one feature I would want - the ability to customize the size of the cup.
by W####:
Primitive formula - 0.0585g/ml, no matter what. No strength or extraction ratio are taken into account. A waste of time. I would recommend Coffee Measures, it's a bit less primitive and free.