Streak: The Ultimate Savings and Investments App for Teens Streak is the best app for teenagers to manage money, make online payments, track expenses, and explore the magic of compounding through safe investments. Built to get every teen smart with money, Streak helps children aged 8-21 learn how to save and manage their finances efficiently. Teenagers get a unique interface customized to suit their usage of the Streak app. They can save, invest, and manage their money with ease, while parents