The best cashflow forecasting tool to use is different for each business. Some businesses have weekly patterns in their business and so a tool like DryRun might be the best to use. Other businesses might be monthly, so Float might be the right solution for them. For more complex businesses you could consider Futrli, Fathom or Calxa. The most important thing to look for in a cashflow forecasting addon is that it connects to Xero, so that it can pull the financial data out and automate the process. And that it allows you to build a cashflow that accurately reflects what you estimate will happen in your business into the future