Wave 

Wave makes accounting as simple as possible. The app has been recently upgraded and uses machine learning to make sure your accounting is on the cutting edge. As a cloud-based software, Wave allows you to access your data from anywhere.

The software offers robust reports that are easy to use and show month-to-month or year-to-year comparisons so you can easily identify cash flow trends. Get all the reports you need to run your business better: profit & loss statements, sales tax reports, balance sheets, and more. When everything is neatly where it belongs, tax time is simple. Wave’s smart dashboard organizes your income, expenses, payments, and invoices. You can also scan receipts with your mobile phone. 

But the most important thing to know is that it is free.