The Invoice App for Small Trade Businesses

Manage quotes, invoices and customers from your phone. Built for the field, not the office.

Download Free on the App Store
Small trade business owner reviewing invoices in the field
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Customer management

Save all your customers in one place. Reuse details on every job.

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Quotes and invoices

Send quotes on site and convert to invoices when the job's done.

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GST auto-calculated

10% GST as a separate line item. ATO-compliant every time.

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Track paid and unpaid

See outstanding invoices at a glance. Chase late payments without a spreadsheet.

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Your branding on every doc

Add your logo, ABN and business details once — on every invoice automatically.

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Works offline

No internet needed on site. Syncs when you're back in range.

Ready to Invoice Faster?

Free to start. No credit card. No signup. Just download and go.

Download on the App Store — Free to Start

Why Small Businesses Choose Drainly

60-Second Invoices

Fill in the job details and tap send — your customer gets a professional PDF before you've packed up the van. No laptop, no office, no waiting.

Built for Your Phone

Drainly is iPhone-first. Create quotes on the way to a job, invoice the moment you're done, and share the PDF directly from your pocket.

Simple Pricing

Free to start, no credit card required. Upgrade to unlimited invoices and quotes for less than the cost of one coffee a month.

How Drainly Compares

Built for sole traders, not enterprise field-service teams.

Feature Drainly Jobber Tradify ServiceTitan
Monthly price Free – $6.99 $49+/mo $35/mo $169+/mo
Built for sole traders ✓ ✗ Partial ✗
Works offline ✓ Partial Partial ✗
Setup time <1 min ~30 min ~30 min Hours
Mobile-first ✓ ✗ ✗ ✗

Need scheduling, dispatch and a full CRM? Use Jobber. Want to invoice in 60 seconds and get on with the job? Use Drainly.

Frequently Asked Questions

Yes. The app is designed for small plumbing and trade businesses. You can manage customers, send quotes, create invoices and track payments all from your phone.
The app is currently single-user and optimised for sole traders and owner-operators. Multi-user support is on the roadmap.
Yes. GST is auto-calculated at 10% and shown as a separate line item on every invoice.
Yes — free to start with limited invoices. Pro is $6.99/month for unlimited invoices, quotes and customers.

Also useful: free invoice templates  ·  best invoice apps compared  ·  pricing