The logbook stays free.
Run the business for $19 a month.

Keep a client record for every account and group their tanks under it. Each tank carries its own water test history, livestock, plants, equipment, photos and notes, so the state of any system is one click from the client, not buried in a spreadsheet.

Log the visit, then send a service report the client opens as a clean view-only page. No account, no app install on their side. What you saw, what you did and what you recommend, on the record.

Recurring reminders keep each tank's water changes, filter service and dosing on schedule, with due and overdue rollups on the dashboard and reminder emails so a busy week does not quietly skip a tank.

Your Venmo, PayPal, Cash App or Zelle handles sit on every invoice, and the client's copy is a clean web page with the payment options and QR codes right there. No processor in the middle of a service payment, and no account for the client to create. Online card and bank payments are optional when a client insists on a card.

Set the schedule once for weekly, biweekly or monthly service and TankBud generates the invoice each cycle, emailing it to the client automatically when you tell it to. Pause and resume per client whenever an arrangement changes.

Every invoice links to the client and the tanks it covers, including several tanks on one invoice, and sits alongside their service reports. Six months from now you can still see what was billed against which system. Payments land in a ledger, receipts go out with a PDF copy of the invoice, and exports come in three shapes: invoice summaries, line items, and payments.