Questions, answered plainly

Only when you apply a fix. Every check is read-only: no cell is edited, coloured or commented, and no copy of the grid is kept. Where a correction is mechanical — a formula that should match its column, a typed-in number where a formula belongs, a spelling that should match the rest — Lexora offers a fix and shows every cell before and after. It writes only when you press apply, checks each cell against what the audit saw first, and every applied fix can be undone.

Your name and email address, to create the account. Then only the spreadsheets you choose in Google’s file picker.
It has no access to the rest of your Drive, and asks for no permission it does not use. The broader Drive permission that would let it scan your whole Drive was deliberately not requested — the reasoning is in the privacy policy.

No. The grid is read and released , never stored.
What is kept is the finding: the cells it names, the few values needed to show it, and the derivation rows behind a money figure. The Google token that lets Lexora recheck a sheet is encrypted with AES-256-GCM before it reaches the database.

The seven data rules run on any spreadsheet at all: duplicates, repeated identifiers, mixed types, inconsistent spellings, outliers, half-filled rows, dates outside the sheet’s period.
The formula rules run wherever a column has enough formulas to have a pattern, and the total checks (a subtotal counted twice, a range that stops short, a broken IMPORTRANGE) run wherever there is a SUM. The money and date rules need to recognise a price, a cost, a date or a status column, and stay silent when they cannot. If Lexora reads a column wrongly, you can tell it what the column is.

The free plan is free and does not expire. It checks one spreadsheet of up to 5,000 rows, as often as you like, with all nineteen rules, and shows every finding in full.
Paid plans add more spreadsheets, watching on a schedule, one-click fixes and longer history. Pro has a 14-day trial you start from your billing page, no card.

You drop back to the free plan. Nothing is charged, nothing is deleted, and your sheets and findings stay in your history.

They are the one thing an audit tool cannot afford. Every rule has a confidence floor below which it says nothing, and every rule ships with a test proving it stays quiet on a healthy sheet.
When a finding is wrong anyway, mark it as not a problem. It stays dismissed in every later check of that sheet, and the rule keeps running everywhere else.

Yes. Revoking access from your Google Account cuts Lexora off at once, and a deletion request to support@lumerexa.com removes your organisation, its spreadsheets, findings, history and credentials — on the request, not eventually.