[For Sale] ClientProof — client approval & revision-tracking SaaS, live and working (Flutter/Firebase)

"Just one more small tweak" — round 7. Nobody remembers when "2 revisions included" turned into unpaid work, and nobody wants to be the one to bring up the invoice mid-project. That fight happens in every agency, every month, and it's already worth real money to solve.

This isn't a guess. A designer's post asking "do clients actually respect your revision limits?" pulled real replies describing this exact scenario. Another freelancer described manually building an entire system — by hand, in every contract — just to enforce revision limits tied to billing. ClientProof is that system, automated.

How it works: send the client a link. No account, no login, no app to install. They see the deliverable, click Approve or Request Changes. Every round against the agreed count is tracked and timestamped automatically — and once sent, a round can't be edited by either side, not even you. When round 7 shows up, the receipt already exists. Nobody has to "remember."

Built and live right now, not a mockup. Flutter Web + Firebase (Auth, Firestore, Cloud Functions), clean code you can read and extend, real Firestore security rules enforcing that immutability at the database level — not just in the UI.

Included: full source code, Firestore schema/rules, docs, deployment config, the domain.

Live demo: https://clientproof-app.web.app — click around, send yourself a test round, see it work.

Pre-revenue means a clean slate: no customers to migrate, no legacy support tickets, no baggage from a founder who lost interest. Price your own plans, brand it yourself, build on top of something that already works.

$2,500, open to offers. Comment or DM with questions.