Duplicate Charges
Catch double billing before it quietly costs you.
Numero notices when the same merchant appears to have charged you twice for one purchase, with the two receipts side by side.
Read-only Gmail access. No bank credentials. Cancel anytime.
Duplicate charges happen for boring reasons — a payment gateway retried, an app double-tapped, a system reconciliation went sideways. The amount is usually small enough that you don't notice, and by the time you do, the return window has closed.
Numero compares receipts from the same merchant for suspicious patterns — same amount, same day, same product — and surfaces the two receipts side by side so you can decide in seconds.
How it works
Three steps, then Numero does the rest.
STEP 01
Connect Gmail read-only
Read-only Google sign-in. Numero cannot send or modify email.
STEP 02
Numero compares receipts as they arrive
Each new receipt is compared against recent ones from the same merchant. Suspicious pairs are flagged, never silently merged.
STEP 03
You review the pair and decide
"Possible duplicate charge — same amount, same merchant, same day" shows both receipts side by side.
What Numero catches
Every moment worth knowing.
Numero surfaces only what deserves your attention right now, with a reason attached.
Duplicate charge
The same merchant appears to have charged twice for one purchase.
Unexpected charge
A charge appeared from a merchant with no recent activity from you.
Refund still pending
A return was accepted but the refund has not landed within the merchant's stated window.
Price quietly went up
A recurring charge increased more than usual — surfaced before it becomes the new normal.
Subscription renewed
A recurring charge just went through — with the exact amount and what changed since the last cycle.
Free trial ending soon
A trial converts to a paid plan in the next few days — flagged before the first real charge.
Read-only. Metadata only. Never sold.
Numero uses Google's read-only Gmail scope. Email bodies and attachments are processed ephemerally and never stored. You control export and deletion.
Also useful
Numero does more than one thing.
Find every subscription hiding in your Gmail.
Numero reads receipts and renewal emails read-only, then keeps a live list of every recurring charge — streaming, SaaS, memberships, trials.
Never lose track of a pending refund.
Numero connects your return confirmation to the original purchase and tells you when a refund hasn't landed in the expected window.
Every invoice and receipt, searchable in one place.
Numero organizes your invoices and receipts as they arrive — no forwarding, no folder rules, no manual tagging.
Frequently asked
Answers before you sign up.
Numero uses conservative same-merchant, same-amount, same-window matching and flags as Possible Duplicate — not Confirmed. You confirm or dismiss. Accuracy comes before apparent completeness.