Vorker handles the paperwork around machine hire: rate quotes, daily site logs from the cab, and the weekly invoice with the log attached. You approve everything.

No. Every quote, invoice and email is prepared and then waits for you. You can read it, edit it, reject it, or approve it and schedule it to go out later. Nothing sensitive happens on its own.
You say the day from the cab: hours, sections, loads. Vorker books it to the job, and on Friday the week’s log becomes the invoice draft with the log attached. If a day is missing it asks you before the invoice goes anywhere.
It learns them from you: reference numbers, the QS’s address, self-billing periods, retention lines. Once it has invoiced a contractor one way, the next week follows the same rules.
One machine is exactly where the hours leak, because the operator and the office are the same person. Vorker is built for businesses of one to ten people, not for large plant firms with an office team.
Photograph them and Vorker matches the supplier, works out the accounting lines including VAT, and attaches the image to the entry, filed to the site. The next receipt from the same fuel card is handled the same way.
No. You type or say it the way you would tell someone in the office, and Vorker works inside the tools you already have: your email, your calendar, your accounting. The quotes and invoices arrive as ordinary PDFs.