Software that
Powers the Trades.
One focused mobile app per trade — built for how that trade actually works. Fast enough to use between jobs. Free to start.
60 sec
Job done to invoice sent
1 tap
Professional PDF generated
0
Logins or accounts needed
NEW INVOICE
Invoice #0043
Mike Johnson · May 24
Invoice Sent ✓
Mike Johnson · just now
Received
$440.00
Invoice #0041 · Paid
The Platform
One company.
One app per trade.
Every trade has its own rhythms, its own line items, its own way of documenting a job. Generic software forces tradespeople to adapt to tools built for someone else.
We build one focused app per trade — purpose-built for how that trade works, priced for a solo operator, and fast enough to use between jobs. No subscriptions. No complexity.
Our Solutions
Vertically-tailored apps for every trade.
Each app is built from the ground up for one trade — the line items, workflows, and documentation tools match how that trade actually works.
Electricians
Voltbill
The Trusted Toolkit for Electricians
Win more jobs and get paid faster with professional invoicing built for solo electricians. Create a photo-rich invoice and email it to your customer in under 60 seconds — without leaving the job site.
- 200+ pre-loaded electrical line items
- Before / During / After photo slots
- One-tap PDF invoice generation
- Stripe 'Pay Now' link in every invoice
- Works offline — no internet needed
Plumbers
Flowbill
Purpose-built for plumbing professionals
Fast invoicing tailored to the line items, photos, and workflows of plumbing, water-service, and drain work.
- Plumbing-specific line item library
- Fixture & pipe photo documentation
- Water heater & warranty tracking
- Parts & materials markup
- Customer history at a glance
HVAC Technicians
Airflow
Built for heating, cooling & ventilation pros
Streamline daily HVAC operations with invoicing, filter-change reminders, equipment tagging, and warranty tracking.
- HVAC equipment tagging by serial
- Filter & maintenance reminders
- Seasonal service scheduling
- Warranty & labor guarantee tracking
- EPA refrigerant log ready
Our Mission
To simplify and empower the lives of the people who build everything around us.
Skilled tradespeople are the backbone of every community — yet the software industry has largely left them behind. Most tools are built for office workers, then awkwardly adapted for the job site.
Whyteboard is different. We partner with tradespeople to understand exactly how they work, then build purpose-built mobile apps that fit into their day — not the other way around.
One app per trade. Built right. Built to last.
Voltbill — Available Now
Everything an electrician needs.
Nothing they don't.
Run Every Job
- 200+ electrical line items
- Before/During/After photos
- PDF generation in seconds
Get Paid Faster
- Stripe 'Pay Now' link in every PDF
- Send in one tap from job site
- Works offline — no internet needed
Know Your Business
- Full customer history
- Invoice tracking & status
- Overdue alerts & paid records
FAQ
Common questions
- What is Voltbill?
- Voltbill is a free iOS app for solo electricians. Create a professional, photo-rich invoice — with Before/During/After job photos — and email it as a PDF to your customer in under 60 seconds, directly from the job site. No login or account required.
- How much does Voltbill cost?
- Voltbill is free to download on the iOS App Store. No subscription, no per-invoice fee, no account setup.
- What electrical line items are included?
- 200+ items across 10 categories — Service Calls, Outlets & Switches (GFCI, AFCI, USB), Lighting, Panels & Circuits (100A/200A/400A upgrades), EV & Solar chargers, Generators, Smart Home, Specialty Work, Materials, and Permits — all at 2026 national-average pricing.
- Does Voltbill work without internet?
- Yes. All data is stored on-device. Create invoices, add photos, and generate PDFs completely offline — ideal for basements, attics, and rural job sites.
- What other trade apps is Whyteboard building?
- Flowbill (plumbers) and Airflow (HVAC technicians) are both in active development. Whyteboard's model is one dedicated app per trade — not a generic tool forced to serve everyone.
Voltbill · Free on iOS
Send your first invoice in under 60 seconds.
No account. No subscription. No setup. Just open the app and go.
Download Voltbill — Free