Hollow Finance contains several useful tools and calculators for your personal finance needs.With the Future Value calculator, you can determine the value of an investment in the future given an interest rate and amount of contributions. The Tip calculator can be used to know the best amount to tip at a restaurant. The Inflation calculator allows you to determine how much a sum of money will be worth in the future. The Business Glossary offers information on tons of business terms and abbreviations that can help you understand your personal finances better.Please consider submitting feedback in the app on the about page. We are working on improving the app in several ways, such as including more tools and options for the widgets we offer. We appreciate your feedback.