Fetcher does work for FBM accounts and we will retrieve all of your sales and fee data just like FBA seller accounts.
However, please note that the only thing Fetcher isn't able to retrieve for FBM orders is any shipping data.
We will still be able to retrieve all of your Amazon revenue and fees because that is all collected under specific ASINs for both FBA and FBM.
However, at this time, Fetcher does not pull the shipping cost that your customer paid to receive your product or the shipping expense that you incur when you buy stamps to ship those orders (through Amazon or 3rd party services like shipstation)
Most of the time, this wouldn't affect your profit in Fetcher because that shipping is normally a positive transaction that is followed by a negative transaction and thus cancels each other out.
For example, when you set up your FBM listing, you may have entered $5 for shipping. Then the customer buys your product and pays you those $5 extra for shipping. At this point, you would buy postage at the cost of $5 to ship this item.
That being said, we are currently working on a project that will give Fetcher the ability to track FBM shipments which would allow us to retrieve all shipping info as noted above.
Stay tuned since and as a Fetcher user, you will be one of the first ones to know when this becomes available!
However, there is a workaround for now. You can add your shipping expense as an "other expense".
To add it as another expense:
Select the Expenses page from right-hand column
Select the Other Expenses tab from the top right corner of the page
Select + Add from the Add/Delete column
Select expenses from our preset categories, or create your own
Assign expense to an ASIN, or leave it as a general company expense
Here's a quick video that will walk you through it:
Some people add that expense weekly or monthly so that they don't have to enter it daily.