Back to products
CogniBill

Generate estimates and invoices for your clients fast.

The simplest estimate and invoice app for solo contractors worldwide. Send professional estimates, invoices, and track payments from your phone. No subscription, buy once, use forever. Works offline, your data stays in your iCloud.

Download on the App Store →
CogniBill
✦
Buy Once
Offline
Offline Ready
No
No Account
Features

Buy Once, Use Forever

No monthly fees, no annual fees, no hidden charges. One purchase unlocks everything forever. Costs less than a single month of most subscription apps.

Zero Servers, Your Data Stays Yours

All data stays on your device and iCloud. No backend servers, no data collection, no data selling. Your client list and financial information are yours alone.

AI-Powered Estimate Creation

Just describe the job in one sentence (like Replace compressor plus 2 hours labor). AI automatically breaks it down into title, client, and line items. Supports Apple Intelligence and OpenAI-compatible models.

Professional PDF in 3 Minutes

Select client, add items, generate PDF. Premium template with your brand colors and logo. Supports brand colors and logo, automatic Chinese uppercase amount conversion. Share via iMessage, email, WeChat, or WhatsApp.

Multi-Payment Tracking

Track deposits, balances, and partial payments. Record date, amount, method, and reference number for each payment. Overdue detection is automatic. View statistics by client with CSV export.

Handwritten Signature

Sign directly on screen with Apple Pencil or your finger. Powered by PencilKit for natural handwriting. Signatures are embedded into PDF — your clients see your real signature.

About

CogniBill is the simplest estimate and invoice app for solo contractors worldwide.

From quote to payment, all in one app. Open the app, select a client, add line items, generate a professional PDF all in under 3 minutes. With AI-powered estimate creation, just describe the job and the AI breaks it down into a complete estimate in 30 seconds.

What makes CogniBill different: One-time purchase at and no subscription. Zero servers all data lives on your device and iCloud and no backend and no privacy risk. Offline-first basements, rooftops, remote job sites no signal? No problem.

Supports US-style contracts, deposit plus balance payment tracking, automatic overdue detection, multi-currency, handwritten signatures, and 8 languages. Built for HVAC techs, plumbers, electricians, designers, photographers, beauty pros, and personal trainers anyone who works for themselves.

Frequently Asked Questions
Is this a subscription?
No. CogniBill is a one-time purchase. No monthly fees, no annual fees, no subscriptions of any kind. Launch price $14.99 (regular $19.99), pay once, use forever.
Is my data secure?
Yes. CogniBill has no backend servers. All your data (client info, estimates, invoices) stays on your device and your private iCloud database. We don't collect, store, or share your data. Your client list belongs to you alone.
Does it need internet?
No. CogniBill is offline-first you can create, edit, and generate PDFs in basements, on rooftops, or remote job sites with no signal. When you are back online, your data syncs automatically via iCloud.
How does AI estimate creation work?
Just type one sentence describing the job (like Replace compressor plus 2 hours labor). The AI automatically breaks it down into title, client, line items with quantities and amounts. Supports Apple Intelligence and OpenAI-compatible models. Use as-is or fine-tune.

No subscription. Buy once. Start today.

Download CogniBill and send your first professional estimate in 3 minutes. Yours forever.

Download for iOSEnd User License Agreement — CogniBillPrivacy Policy — CogniBill