In these challenging economic times the MTA's MetroCard Bonus has a tendency to leave less than a ride on your card. Now for your Android phone: MTA Bonus Calc. Easy to use buttons for entering the amount on your card with a highlighted section for the smallest amount that will get a bonus and an even number of rides. Change the highlight color to match your ride. Don't throw away your spare value. Don't wait on a booth line to transfer monies. Get the MTA Bonus Calc at the Android Market and be financially prudent.