Drop a sales export and see every product that has not moved in 90 days. It reads the file in your browser, so nothing is uploaded and there is no account to make.
Free. Works with any CSV that has one column per day.
Every product that has not sold in 90 days, so you can see what your shelves are holding instead of guessing.
Every other tool asks you to type in how long a supplier takes. This one reads it from your own receiving history.
The slow delivery is the one that strands you, and nobody remembers that one. How much a supplier varies matters more than their typical week.
The check reads your file locally. There is no upload and no account, so there is nothing for anyone to store, leak or have to delete.
Then it plans your reorders off that one number, and the number is a guess you made once and never revisited.
Your receiving history already contains the real answer: when you ordered, and when it actually landed, over and over. That gives a typical wait and, more usefully, how much your supplier varies. A supplier who takes two weeks give or take a day is a different problem from one who averages two weeks and sometimes takes five.
Shop owners are being asked first, on purpose. A forecasting tool nobody asked for is the most common thing in this category, and the most common thing to abandon.
The free check above works today either way, and it does not need an account, a trial, or a card.