A receipt checker for electricity
Your power bill has a formula.
WattProof shows its work.
Review what was read, recompute supported charges against the tariff that actually governed the bill, and leave with a calm evidence-backed request.
- 01Evidence firstEvery material fact keeps its page and printed text.
- 02Code calculatesGPT-5.6 may read; Decimal arithmetic handles money.
- 03No invented savingsMissing interval data becomes an honest limitation.
Try the verified public sample
PG&E delivery + 3CE generation · E-TOU-C · Dec 2022
Privacy: uploads are processed in a temporary file and deleted immediately. Unknown native PDFs use GPT-5.6 only when an API key is configured; API storage is disabled.
Before conclusions
Review what WattProof read
Printed facts and inferred metadata stay visibly distinct. Correct anything before code runs the tariff math.
Structured synthetic fixture
The authentic public PDF is unchanged. Only the extracted peak-charge value is altered for this detection test.
Deterministic result
Audit result
Expected amounts use archived, hash-verified rate snapshots. Unsupported components remain visible and unclaimed.
Every check, line by line
| Status | Line | Billed | Expected | Delta | Trace & evidence |
|---|
No guesswork
Can another plan be compared?
A confident “not yet” is more useful than a fabricated savings number.
What unlocks a real comparison
Download Green Button interval data from the utility account, then compare schedules over a representative period.
Evidence into action
Ask for a review, not a fight
The request is grounded only in audit lines above. Edit it, add account-safe details, and review every word before using it.
User review required. WattProof never sends messages or adds account details automatically.