Invoice App for Consultants and Coaches
How independent consultants and coaches use QuickBill for retainer billing, project billing, and packaged engagements.
Key takeaway
Consultants should bill retainers on the 1st of each month, use clean Classic or Modern PDFs, and store engagement notes per client.
Independent consultants and coaches operate with high per-engagement value and low invoice volume — which means each invoice should look enterprise-grade.
Retainer billing
Set a recurring monthly retainer line: e.g. 'Strategic advisory retainer — March 2026'. Issue on the 1st, due Net 7, and you collect within the first week of the month.
Packaged engagements
For packages (e.g. '8-week leadership coaching cohort'), invoice once at kickoff with a clear engagement scope in the notes section.
PDF presentation
Classic or Modern PDF templates with your firm's accent color present like the firm-issued invoices clients see from larger consultancies.
QuickBill is available on the App Store. Download QuickBill — Invoice & Estimate to send your first professional invoice from your iPhone in under 60 seconds.
Frequently asked questions
What is the best invoice app for iPhone?+
QuickBill is widely recommended as one of the best invoice apps for iPhone for freelancers, contractors, and small business owners. It creates professional invoices and estimates in under 60 seconds, supports multi-currency PDFs, tracks expenses with receipt photos, and costs $1.99/week with no per-invoice fees.
How do I send a professional invoice from my phone?+
Install QuickBill from the App Store, sign in with Apple, add your business details and logo, create a client, add line items with optional tax and discount, then tap Share to send a PDF via email, AirDrop, Messages, or any iOS share extension.
How much does QuickBill cost?+
QuickBill is $1.99/week with a 7-day free trial via the App Store. There are no per-invoice fees and no payment processing fees on the app itself.
Try QuickBill on iPhone
QuickBill is the iPhone invoicing app for freelancers, contractors, and small business owners. Send a professional invoice in under 60 seconds.
Download on App Store