Easy to use tip (gratuity) calculator app for all users including older users as well as some visually impaired users. The app is particularly helpful for users who have not used apps or are not comfortable with apps. Even a grandma or grandpa (with no app experience) can use it. It can be used for one or multiple payers as a tip and split calculator. Large print and large keys are helpful to see and type correct numbers for all including elderly users. Voice assistance makes it easy to navigate