The reason our sales estimates are different (and more accurate) is that we take in more data for our calculations.
Our tools estimate sales based on the average BSR over time by capturing an hourly average BSR, and then adding up those daily estimates for the monthly sales estimate. This accounts for vast fluctuations... running a promotion or going out of stock won’t skew the estimates.
Other tools estimate sales based on the BSR right now, showing you a brief snapshot. This widely varies from day to day, and even hour to hour. Looking at a product’s sales estimates in the morning may be completely different than the evening.
To learn more about what makes our tools better click here.