Walnut money manager is one of the best daily expense trackers to automatically and securely track your monthly spends. The app also helps with transferring money from one's bank accounts to friends, seeing due bills for credit cards and paying those bills, checking bank balance, along with all your transactions. Also, it helps its eligible users with instant personal loans via Walnut Prime. The app is available for free on android and IOS platforms but has a couple of revenue streams of its own, for instance, targeting users based on their spend history to offer them instant loan and earn from that. The app has some 10 million plus active users on playstore.