This should be how both the iPhone and Android app work at this point (please let us know if this is broken for you on either of those). We still have not fixed this issue on the website, though it is something we plan to do.
Marshallsadfads supported this idea ·sadfads commented
If I use comma's in both Android as the IPhone app I'll get the wrong amount. For instance 10,23 Euro's will be interpreted as 1023.00 Euro's. If I use periods, you get the right amount. Please fix this as this is should be expected from an app like this.