Invoice App for Web Developers and Software Freelancers
How web developers and software freelancers use QuickBill for hourly billing, project-based billing, and recurring retainers.
Key takeaway
Use QuickBill for hourly time-and-materials billing, fixed-price projects, or monthly retainers — all from the same iPhone app.
Software freelancers tend to bill in three patterns: hourly time-and-materials, fixed-price projects, or monthly retainers. QuickBill supports all three with the same fast workflow.
Hourly T&M
Add a single line item per engagement: 'Software development — January 2026' with quantity equal to hours and rate equal to your hourly rate. Note the time period in the description for the client's records.
Fixed-price
Use milestone invoices: e.g. Discovery (20%), Build (40%), Launch (40%). Send each invoice as the milestone closes.
Retainers
Bill on the first business day of each month. Save the retainer as a single line item so renewing the invoice is one tap.
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