OpenTeller is a budget planner developed by Oluwatimi Owoturo for Android devices. This free finance app is an excellent platform for tracking your monthly finances across compatible bank accounts, ensuring you spend within your budget and do not exceed your monthly expenses. 

Track your spending 

With OpenTeller, keeping track of your money is simple and organized. You can add your bank transactions by taking screenshots, importing CSV files, or syncing your bank account. It sorts your spending into categories, helping you see how much you earn, spend, and save across different accounts and currencies. 

The app also includes an AI assistant that answers questions about your spending. Additionally, it avoids using third-party aggregators for added privacy. However, you must update your transaction data regularly to keep your records accurate. Furthermore, accessing the app's full features requires a subscription. 

A practical tool for handling finances 

Overall, OpenTeller provides a convenient way to manage your finances by organizing transactions, tracking budgets, and offering helpful spending insights through its AI assistant. The privacy-focused approach is another advantage, though regular data updates and a subscription for advanced features might be drawbacks for some users.