One Tap Calculator is the best math game. Use only once each digit/symbol and make the goal number ! First click the number and then symbol and again number. If you want to try again to create the same goal number, press refresh button and all the numbers/digits will appear again ! One Tap Calculator 2 presents a monthly multiplayer mobile gaming contest: when the user finds the correct answer wins a point. At the end of the month, the top three users win the prizes. Winners are subject to eligibility. Must be eighteen (18) years or older. Apple is not a sponsor on involved in any way with the One Tap Calculator 2 contest.