What it finds
The mistakes that compute quietly and look right, which is why they get past a review of the results:
- A total that stops short of the data: The formula is fine. It just ends a few rows too early, and nothing on the screen says so.
- A number typed into a formula: It is right until the rate changes. Then it is wrong in every row it was copied into.
- One row that calculates something different: Every row in the column does the same thing, except one. The answer it shows looks perfectly normal.
- A figure typed over a formula: The column calculates, row after row, until the one row where somebody typed the answer in.
- A total that disagrees with its rows: The rows add up to one figure and the total says another.
- Error values, and the one cell causing them: Two hundred cells show #REF!. One of them is the cause, and it is rarely the first one you see.
- A formula that points at a sheet that is gone: The cell shows 0. It should show an error, and would, if IFERROR were not hiding it.
What a check gives you
A report in plain English, each problem with its cell, the evidence and why it matters, and a copy of the file with every problem marked in place, ready to send back to the client. A check takes seconds.
What happens to the client's file
The file is read, checked and deleted as soon as the check finishes. Nothing in its cells is kept by a free check, and each check runs on its own, apart from every other. The privacy notice says exactly what is kept and for how long.
For a practice
The paid plans watch a folder of client workbooks in OneDrive or Dropbox, check each file again within the hour it changes, and tell you once a month what changed: Solo at £19 a month, Practice at £59 a month, Firm at £149 a month.
Start with one file
Take a workbook a client sent last month and run it through. Most finish in seconds.