Fast Field Estimates.
Instant Client Payments.
The phone-first operating system for electrical, plumbing, HVAC, landscaping, and roofing pros. Calculate materials in your truck, build 3x Good/Better/Best tiers with profit protection, and collect card payments on site.
Field Operations & Smart Invoicing
Calculate real trade math (pipe sizing, wire loads, mulch yardage, Manual J cooling, roof bundles) and generate professional itemized quotes before you leave the driveway.
Pay Invoices, Approve Estimates & Verify Contractors
Did your contractor text or email you an OnderVolk payment link? Enter your code or link below to access your secure document.
Never Underbid a Job Again.
Save your wholesale supply house prices and labor rates. OnderVolk automatically locks in your profit floor, adds overhead buffers, and generates 3x Good/Better/Best tiers in 0 seconds.
Contractor Price Book & Margin Guard
Save your wholesale supply house prices and crew rates. OnderVolk automatically locks in your profit floor and builds 3x Good/Better/Best tiers with zero guesswork.
Select Job Items from Your electrical Price Book
2 items activeSquare D 200A Main Breaker Panel & Busbar
SKU: SQD-QO200-MB · 6.5h Crew Labor · Panels & Service
$696.00
Wholesale: $480 (+45%)
Type 2 Whole-Home Surge Protector (SPD)
SKU: EATON-CHSPT2-ULTRA · 1.5h Crew Labor · Protection
$180.00
Wholesale: $120 (+50%)
Level 2 EV 48A Dedicated 240V Circuit & NEMA 14-50
SKU: EV-50A-NEMA-KIT · 3.5h Crew Labor · EV & Dedicated
$294.00
Wholesale: $210 (+40%)
3x Instant Upsell Tiers
Direct profit: +$1165.33 (40% margin)
Direct profit: +$1771.31 · 3-Yr Warranty + Priority Service
Direct profit: +$2622.00 · 10-Yr Full Parts & Annual Tuneups
Turn Every Job Into a Lifetime Client.
Log model serials, warranty dates, and filter replacement specs at each property. Homeowners get a digital passport, and you get automated SMS tune-up reminders that lock in repeat service.
Customer Equipment & Warranty Vault
Permanent equipment history & serial tracking for 742 Evergreen Terrace, Austin TX
Installed Units (5)
Square D (Schneider Electric) 200A Main Breaker Panel & Busbar
S/N: SQD-2024-99812-TX
Warranty
7.5 years remaining
Carrier Infinity Series 4-Ton 18 SEER2 Variable Speed Heat Pump
S/N: CAR-8842109-HP
Warranty
6.9 years remaining
Rinnai Sensei 199,000 BTU Tankless Natural Gas Water Heater
S/N: RIN-554109-WH
Warranty
12.2 years remaining
GAF Timberline HDZ Architectural Asphalt Shingle System
S/N: GAF-WARR-2022-771
Warranty
20.7 years remaining
Rachio 3 Pro + Febco 765 12-Zone Wi-Fi Smart Irrigation Controller & Backflow
S/N: FEB-BACKFLOW-449
Warranty
0.6 years remaining
Digital Equipment Passport
Square D (Schneider Electric)
200A Main Breaker Panel & Busbar
Replacement Specs & Filters:
42 Spaces · 22kAIC Fault Rating · NEMA 3R Outdoor
Contractor Log Notes:
Main breaker 200A. Whole home surge protection Eaton CHSPT2 installed in slots 2-4.
Interactive Trade Workbench
Calculators Built for the Way You Work
Panel & Wire Load Demand
NEC 220 general lighting + appliance demand calculation. Sizing 100A to 400A panels instantly.
Use calculator →IPC Water Pipe Sizer
WSFU fixture unit loads, dynamic friction loss, and residual pressure targets for copper and PEX.
Use calculator →Manual J Cooling Sizer
Conditioned square footage to BTU/hr capacity, system tonnage, and 400 CFM/ton airflow recommendations.
Use calculator →Bulk Material & Mulch Yardage
Calculate length × width × depth into exact cubic yards, aggregate tonnage, and 10-yard dump truck loads.
Use calculator →Roof Squares & Bundle Takeoff
Roof deck area and pitch waste factor converted into field bundles, ridge cap, and starter courses.
Use calculator →Full Interactive Catalog
Includes Concrete, Framing, Tile, Asphalt Paving, Solar Arrays, Fire Inspection, and Pest Control.
End-to-End Workflow
From First Measurement to Paid in Full
Zero manual paperwork. Zero PDF attachments. Zero chasing checks.
Price Book & Math Quote
Select parts from your custom catalog or trade calculators. OnderVolk builds itemized quotes and 3 Good/Better/Best tiers with profit protection in 15 seconds.
1-Tap Client Approval
Your client gets a clean SMS link. They see the scope, choose their preferred tier, and tap "Approve" without downloading apps.
Instant Card Payment
Clients pay deposits and final invoices securely with Apple Pay, Google Pay, or Card. Funds land directly in your bank.
Automated Review Loop
As soon as the invoice is paid, an automated 30-second review request routes happy clients straight to your Google Business page.
How Much Profit Are You Leaking Every Month?
Adjust your crew size and volume to see what OnderVolk recovers for your trade business.
Enable Good/Better/Best Upsells
Offer Standard, Deluxe & Premium tiers automatically
Total Projected Annual Profit Lift
+$98,280/ year
Monthly Cash Injected
+$8,190/mo
+$35,100/yr
Stops techs underpricing labor hours & parts markups in field.
+$18,900/yr
Home Depot vs Lowe's vs Ferguson price route optimizer.
+$44,280/yr
38% of clients choose Better & Best tiers when offered.
Simple Transparent Pricing
Pick Your Crew Plan
Every plan includes custom price books, margin floor protection, all 87 trade tools, and instant SMS invoice processing.
Solo Operator
1 Master SeatSingle van or independent tradesperson wanting fast quoting, trade math, and instant card payments.
What's Included:
- ✓1 Master User License (Mobile & Web)
- ✓All 87 Trade Math Calculators & Field Checklists
- ✓AI Voice-to-Quote Dictation (Gloves-On)
- ✓Wholesale Price Book & Margin Floor Guard
- ✓Unlimited Estimates, Invoices & Digital Work Orders
- ✓1-Tap SMS & WhatsApp Customer Payment Links
- ✓100% Offline-First Mode with Basement Cache
- ✓Receipt Vault with AI Camera OCR Scanner
- ✓50-State Statutory Pre-Lien & Warranty Generator
No credit card required for 14-day trial • Instant activation
Crew Pro
Up to 6 SeatsGrowing teams with 2 to 6 field techs needing multi-seat dispatch, upselling, and review growth.
What's Included:
- ✓Includes Everything in Solo Operator
- ✓Up to 6 Tech & Helper Mobile Seats Included
- ✓Role-Based PIN Security (Hides margins from crew)
- ✓3-Tier Good / Better / Best Upsell Proposal Engine
- ✓Live GPS Dispatch Board & Route Optimization
- ✓Customer Live "Tech On The Way" Portal (/t/[token])
- ✓Automated Google 5-Star Review Gatekeeper Flywheel
- ✓Interactive Before/After Photo Slider with GPS Stamp
- ✓Customer Equipment & Warranty Vault (Serial Passports)
- ✓Custom Contractor White-Label Branding & Logo
No credit card required for 14-day trial • Instant activation
Empire Fleet
Unlimited SeatsHigh-volume multi-crew operations, commercial trades, GCs, and fleet owners wanting maximum leverage.
What's Included:
- ✓Includes Everything in Crew Pro
- ✓Unlimited Technician, Subcontractor & Dispatch Seats
- ✓QuickBooks Online & Desktop 2-Way Sync (.QBO / .IIF)
- ✓Live Multi-Supplier Wholesale Price Radar
- ✓Multi-Van Warehouse & Truck Restock Inventory Tracker
- ✓Subcontractor 1099 Expense Tracking & Auto-Splits
- ✓Viral Customer Referral & Neighborhood Marketing Engine
- ✓Multi-Trade & Multi-Branch Enterprise Dashboard
- ✓Digital Change Order Legal E-Signatures
- ✓Dedicated Account Manager & Priority 24/7 Phone Support
No credit card required for 14-day trial • Instant activation
Everything You Need to Know About OnderVolk Field OS
In-depth details on offline math engines, code compliance (NEC / UPC / Manual J), Stripe PCI-DSS security, 50-state statutory lien notices, and 1099 subcontractor payouts.
OnderVolk operates on a local-first client engine. The entire catalog of 87 trade math calculators, code reference tables (NEC, UPC, IPC, ACCA), wholesale pricing books, customer history, and proposal generators are packaged directly within the local device memory using an SQLite/IndexedDB persistence layer. When working in reinforced concrete basements, steel pole barns, elevator shafts, or remote rural job sites with zero cell reception, you can perform diagnostics, run load calculations, generate complete 3-tier proposals, and record digital client signatures with zero latency. When your device reconnects to Wi-Fi or cellular LTE, queued records, photos, and signatures automatically synchronize with the central cloud database using deterministic delta sync with zero data loss.
Key Specifications:
- ✓Zero latency: Instant execution of all formulas and quote drafts locally on the device
- ✓Full offline functionality: Proposal generation, photo capture, and customer signature collection without internet
- ✓Automatic conflict-free sync: Uploads background queues seamlessly upon network reconnection
Most contracting businesses fail not from lack of work, but from unburdened bidding. Quoting solely on wage plus raw materials ignores indirect costs: non-billable drive time, vehicle depreciation, fuel, commercial liability insurance, worker's compensation, shop tooling, and office overhead. The OnderVolk Margin Engine calculates your true fully burdened hourly shop rate. When drafting a quote, the system continuously evaluates the net margin in real time. If an unapproved discount or underestimated labor time drops the job below your established margin floor (e.g., 38% net), the system displays a clear margin warning before the proposal can be finalized.
Key Specifications:
- ✓Calculates total burden: wages, payroll taxes, insurance, fuel, vehicle wear, and non-billable hours
- ✓Real-time margin telemetry: Visual green/amber/red indicator updates with every line-item change
- ✓Hard margin floor: Protects against unprofitable bids and underpriced change orders
Have a specific trade calculation or custom workflow question?
Explore our complete 87-tool calculation catalog or read the contractor field guide for step-by-step instructions.