Are there any mobile technician apps that let crews capture estimates, reminders, and invoices from the field?

Yes — there are several mobile technician apps built for field crews that can capture estimates, reminders, and invoices on-site.

Common options include:

• Jobber — good for service businesses; mobile estimates, scheduling, reminders, invoicing, and payments.
• Housecall Pro — strong for field service teams; estimates, job reminders, invoicing, and customer communication.
• ServiceTitan — more robust for larger HVAC/plumbing/electrical crews; estimates, dispatch, reminders, and invoices.
• FieldPulse — mobile-first for small to mid-sized field teams; estimates, invoicing, and task/reminder management.
• Knowify — useful for contractors; estimates, project tracking, reminders, and invoicing.
• mHelpDesk — field service management with estimate-to-invoice workflows.
• Commusoft — popular with service companies; quoting, scheduling, reminders, and invoicing.

If you want, I can also narrow these down by:

1. company size
2. industry
3. budget
4. whether you need offline mobile capture