Simple Invoice Maker - DUQIO

Invoice Maker & Billing App

Simple Invoice Maker by INVI is a powerful invoice generator for small businesses, contractors, and freelancers. Quickly create professional invoices, billing statements, and digital receipts on the spot. This invoicing app works fully offline (no internet needed) and lets you send beautiful PDF invoices and estimates to customers from your phone. You can easily record payments (full or partial) against each invoice, add due dates, and receive automatic reminders for overdue bills. INVI’s invoice maker helps you get paid faster while keeping your finances organized.

🧾 Unlimited Offline Invoicing: Make and manage as many invoices or quotes as you want, anywhere, anytime. No monthly fee or Internet required.
🧾 Fast Invoice Generator: Create invoices in a few taps. Choose from multiple invoice templates or customize your own (add logo, company info, colors). Use it as a billing app for any service or product.
🧾 Estimates & Quotes: Convert estimates or quotes to invoices with one tap. Track approved quotes and convert them to sent invoices to simplify billing.

Templates, Branding & PDF Invoices

Customize your invoices to match your brand. Pick from professional invoice templates and personalize fields. Add your logo, tax registration number, or signature. Enter itemized product/service lines with quantities and rates. Include custom notes or payment terms on each invoice or bill. The app’s built‑in PDF maker generates professional-looking invoice PDFs and estimate documents. Share invoices instantly via email, SMS, WhatsApp or any messenger – or save them to your device. PDF export makes record-keeping and printing easy.

Cloud Backup & Sync (Optional)

Enable cloud backup to sync your data across devices. All your invoices, estimates, clients, products, and reports are securely saved online. If you use multiple devices or want an extra backup, log into the app with the same account and recover your data. This ensures you never lose invoices and can continue invoicing seamlessly (even if you reinstall or change phones).

Payment Tracking & Reminders

Keep track of every payment. Mark invoices as paid (full or partial) with timestamps. View paid vs. outstanding amounts at a glance. The app can send automated reminders for overdue invoices, helping you get paid faster. You can configure reminders (e.g. “2 days past due”) so that clients receive a polite notice and you stay on top of receivables. INVI’s payment tracker and bill organizer help you avoid missing any billable items.

Clients & Products Management

Save client profiles and product/service lists to speed up invoicing. Select customers from your address book or add new ones in-app. The app remembers each client’s billing address and payment history.
Likewise, store your products and services in a catalog: enter names, descriptions, and prices once, then auto-fill them into invoices or estimates. This is ideal for contractors or freelancers who bill similar tasks repeatedly.

Revenue Reporting & Analytics

Track your business income over time. INVI displays monthly and yearly revenue charts so you can see cash flow trends at a glance. Filter invoices by status (paid, unpaid, overdue) and by client to analyze who pays fastest. Export data for accounting – either by sharing invoice PDFs with an accountant or by using the report summaries built into the app. Knowing your numbers helps you make smarter decisions and never miss payment deadlines.

Taxes, Discounts & Custom Notes

Manage taxes easily. Set a default tax rate (e.g. 7% GST) or apply a custom rate on each invoice.
Add discounts in percent or flat amounts to items or the invoice total. Enter any custom notes or terms on invoices – for example, “Thank you for your business” or payment instructions.