Tenpenny Invoice & Estimate Maker App

Overview

Tenpenny is an invoicing app for people who bill by the job: carpenters, handymen, painters, cleaners, landscapers, and freelancers who work the same way. It opens on what is coming in and when, drawn as one line of every unpaid invoice, and on what needs the person today: a late invoice to remind, an estimate waiting for an answer, a draft to finish.

Invoices and estimates are drawn as paper that reads at a phone's width, in three styles. A note typed on the job becomes a draft priced from the person's own items, and anything without a price waits for one. The client gets a link to a page they open in any browser, with the person's own payment link; Tenpenny never takes a card or moves money.

Key features

• Overview: what is coming in, the due line, what needs you today, this month against last

  

• An invoice as your client sees it, with its history: sent, viewed, part payments, reminders

  

• Draft from a note (AI): lines priced from your items or your note, the rest waits for a price

  

• Estimates: valid until, accepted online by the client, converted to an invoice once

  

• The client's page: the paper, a Pay online button with your link, Accept or Decline

  

• Record a payment: the amount on a keypad, the method, part or in full

  

• Reminders (AI, Pro): friendly or firm, never a fee or a threat

  

• Reports: money received by month, what is still owed by age, top clients, tax charged

  

• Paper style: Ledger, Studio or Plain, with an accent

  

Screens

Welcome, setting up the business, how clients pay and starter items, sign-in, Overview, invoices, estimates, clients, Business, an invoice and its editor, a line, choosing a client, sending, the client's view and the client's page, recording a payment, a reminder, an estimate and its editor, a client and its editor, Draft from a note, Reports, Paper style, Activity, the business profile, items, how you get paid, numbers and terms, tax, reminders, keeping your data on a new phone, AI features, the AI consent, Tenpenny Pro, About, Privacy and Terms: 44 screens, light and dark.

AI and backend

Supabase keeps each person's business, clients, items, invoices, estimates, payments and job photos, readable only by their owner, with the rules in the database: numbers given out once, totals and tax to the cent, payments never above the balance, the free plan's three sends a month, one invoice per estimate. The client's page reads one document by its link and records a view; an estimate's answer is taken once. Everyone starts as an anonymous user; an email with a 6-digit code keeps the records on a new phone.

One Edge Function runs two AI tasks with Gemini against a daily allowance: Draft from a note (the note, item names and prices, and client names are sent, never contact details) and written reminders (Pro). The server keeps only prices the person gave, and a reminder with a fee, interest or a threat is refused. Nothing is sent before the person allows it once.

Monetisation

Tenpenny Pro through RevenueCat, yearly with a 7-day free trial or monthly: unlimited sending (free: three invoices a month), reminders written for you, Ledger and Studio papers with an accent and a logo, more drafts a day, and reports for any year with CSV export.

Records, not advice

Tenpenny keeps your records. It doesn't give tax, legal or accounting advice: tax rates are the ones the person enters, the AI never sets a price, a tax or a due date, and reminders are drafts the person sends from their own mail.