Available on iTunes, the Debt Payoff Assistant app asks you to choose either the debt snowball or debt stacking method as your overarching strategy (see our guide on both here.) From here, the app will track your payoff progress, displaying a bar for each debt. It offers an in-depth analysis of your debts and you can drill down into stats for each debt such as total interest paid, total interest saved, debt payoff date and debt payoff time savings.