Check your spreadsheet against the source of truth
You already do this by hand: you have a number, and a source you trust, and you check one against the other. Tally automates that loop — recomputing the figure from the source and telling you the moment they don't agree.
The manual loop
The check you already run by hand
Every operator has a version of the same ritual. One described it exactly:"I count the money in the safe drop and verify the value against the safe-drop ticket. If they don't match, I do a recount." A number, a source you trust, a comparison — and a redo when they disagree. It's the most basic form of getting the numbers right, and it's entirely manual.
"Source of truth" is the phrase operators reach for again and again — the raw rows behind a summary, the books, the master file, the ticket in your hand. The work is always the same: prove the number you're showing matches the thing you trust. Tally's whole job is to run that loop for you.
How Tally does it
The loop, automated
Rebuild from the source
Tally re-adds the figure straight from the data it should come from — the recount, done automatically and instantly.
Match or mismatch
You get a clear ✓ or ✗ per figure — does it tie to the source, or not — instead of a manual comparison you have to run yourself.
The receipt, kept
The rows behind every figure stay attached — so “are you sure it matches?” is answered with proof, not another recount.
Live today · more coming
Checking a figure against its own source rows is live now — free, in your browser. Tying a number to a separate source of truth (a receipt, the books, another person's file) is the cross-source tie-out shipping next; join the interest list and we'll tell you when it lands.
Checking against a source of truth — common questions
Let the loop run itself
Free, no account, and your file never leaves your browser.
Related: Reconcile two spreadsheets· Verify without uploading· What Tally is