What is the best application for weighing coins?

I do not have weighing scale that I can use on my coin collection. They may be mostly available in online, which of course I am always outside my house and usually they deliver between morning and afternoon. I need the application that can be used for weighing coins without gimmicks. Even from the Play Store they use gimmicks just to weight anything on the phone. I have token that still not put yet in their respective catalogues, like the token that  would be needed to determine weight of that token. But I already know the diameters of those coins or tokens by using other coins with its same diameters. 

well, it costs more to look for an application :)

I highly suggest that you purchase an actual digital scale on Amazon.com. Trust me those apps don't work, unless it was one of those apps that needs an actual physical scale to hook up with, and not free of charge. The ones on Amazon are about $10-20 USD, if that works for you. If not, other websites will sell better scales for a higher price and shipping. Hope this helps. :)