You do not type an invoice. The app reads the approved scope, the lines you marked complete, and the purchases you logged, and builds the invoice from those. Labor and materials come out separately with tax figured, any deposit gets applied, and the balance due falls out at the bottom. Once it is issued it is read-only and backed by its own stored copy, so the invoice a customer is holding cannot change afterward.

• Generated from completed work and the costs you actually paid
• Labor lines, material lines, materials tax, deposit applied, and balance due
• Approved change orders fold in on their own
• Read-only once issued, with its own permanent copy behind it
• Branded PDF, numbered in sequence, sent the same three ways as anything else
• Nobody gets billed past what they approved, because the quantity is capped

Log a payment with the amount, the date it came in, how they paid including the check number, a note that prints on the receipt, and a separate note that stays yours. Every payment produces a numbered receipt, and that receipt shows its work: the contract total, what was received before, this payment, credit for anything you skipped, and what is left. Every row prints even at zero, because "previously received, none" is exactly what a first receipt needs to say.

• Amount, date, and method, with cash, check, credit or debit, and electronic seeded in
• Check number captured when that is how they paid
• A note that prints for the customer and one that does not
• Record from the job, scoped to its open invoices, or from the customer
• Every payment produces its own numbered receipt
• The receipt names every payment on the job to date and which receipt covered it
• Partial payments handled as the normal thing they are

Every job carries its own finance view: contract total, estimate total, what has been invoiced, what has come in, deposits, purchases, and what is still owed. The same picture rolls up per customer, so you can see a whole relationship at once instead of adding up jobs in your head. Cards for invoices, payments, purchases, and deposits sit underneath, so the number and the reason for it are one tap apart.

• Contract total, invoiced, received, and still owed, per job
• The same picture across every job for a customer, with running totals
• Cards for invoices, payments, purchases, and deposits
• Job cost summary with labor against materials
• Every bit of it recorded on the phone first and synced after