Offline Invoice Maker.
Invoices that work wherever you do.
Fast, private, and 100% on-device. 32 handcrafted PDF templates, touchscreen client signatures, and instant vector exports — with zero cell signal required.
Built for the field.
Not for Silicon Valley boardrooms.
Most billing apps treat your phone as a weak terminal waiting on a distant cloud server. Offline Invoice Maker operates as a self-contained local powerhouse.
100% Offline & Field-Ready
Draft estimates, calculate taxes, and compile 300 DPI vector PDFs in basements, underground vaults, and remote dead zones with zero cell bars.
Sign on Glass
Hand your phone to the client for an immediate touchscreen finger signature. Eliminates messy paper clipboards and post-job payment disputes.
Private by Architecture
Encrypted in a local SQLite hardware database. No mandatory cloud accounts, no remote server sync, and zero tracking. Your data stays on your device.
Instant Payment QR Codes
Embed dynamic scannable QR codes for PayPal, Stripe, Venmo, or bank wire directly onto the invoice so clients can pay you before you leave the site.
Everything a serious business needs.
Nothing it doesn't.
Engineered from scratch for speed, reliability, and zero-latency execution. No cloud round-trips, no surprise subscription lockouts, and no accounting bloat.
On-Device PDF Generation
Rendered locally on your phone in milliseconds with zero server round-trips.
Instant On-Device Vector PDF Engine
100% OfflineCompile audit-ready 300 DPI vector PDFs directly on your smartphone. Zero network latency, zero cloud rendering bottlenecks, and zero timeouts on remote job sites.
32 Designer Layouts & Brand Customizer
32 Bespoke LayoutsEncrypted On-Device SQLite Vault
Hardware SecurityTouchscreen Signatures & Scannable QR Codes
On-Site SettlementMobile Dashboard & Fast Creation
All-in-One Mobile32 handcrafted templates.
One tap to match your brand.
Every document is compiled as a true 300 DPI vector PDF directly on your smartphone. Select your layout framework, pick a brand accent palette, and attach your logo.
Classic Studio
FREEClean, timeless letterhead for general trade & contracting
Corporate Enterprise
FREEProminent company header with formal billing columns
Swiss Minimal
FREEQuiet minimalism with precision JetBrains Mono typography
Modern Atelier
PROSubtle pill cards, high-contrast totals, and digital feel
Compact Tradesman
PROHigh-density lines optimized for multi-item repair tickets
Studio Creative
PRODistinct left accent rule for engineering & consultants
Complete brand identity in your pocket
Tailor every invoice parameter natively on device with zero subscription fees or design software.
Built for specialists who bill
on the move.
No logo yet? Start with any of our 48 built-in trade logos across 12 industries, or import your own custom emblem directly from your phone's photo library.
Construction & Contracting
Framing, foundations, drywall & retainage
Draft estimates and invoices in 30 seconds from your vehicle or work site. Pre-configured for construction & contracting professionals with customizable hourly rates, client address book, and localized tax presets.
- STEP 01
Select client or add on site
Import a contact directly from your phone's address book or create a new profile in seconds.
- STEP 02
Add items & sign on screen
Select catalog items with one tap. Your client signs with their finger on phone glass.
- STEP 03
Instant 300 DPI vector PDF
AirDrop, WhatsApp, or email the completed invoice immediately — even with zero cell bars.
Why professionals choose
offline-first reliability.
No mandatory cloud sign-ups, no monthly hostage fees, and no broken screens when you lose cell signal on job sites.
| Capability | Typical Cloud SaaS | Offline Invoice Maker |
|---|---|---|
| Pricing & plans | $30 – $60 / month ($360 – $720 / yr) | Free to start · Flexible monthly, yearly or lifetime |
| Offline reliability | Sync errors, timeouts, or read-only lockout | 100% full speed without internet or cell signal |
| Data privacy & custody | Stored on remote third-party databases | Encrypted on physical hardware (SQLite vault) |
| PDF compilation speed | 2.5s – 6.0s cloud round-trip wait | Instant on-device vector generation (<100ms) |
| Account requirements | Mandatory cloud login & password resets | Zero accounts needed · Instant startup |
| Document access offline | Locked out in basements or cellular dead zones | 100% accessible anytime on your phone |
| PDF design architecture | Generic cookie-cutter templates | 32 handcrafted layouts with brand colorways |
Tested in mechanical vaults,
trucks, and job sites.
From emergency repairs at 2 AM to underground corporate vaults, discover how contractors and independent pros rely on local offline invoicing.
“When I am in a commercial switchgear vault 3 stories below ground, there is zero cellular reception. Other apps freeze and refuse to generate PDFs without a cloud sync. This app compiles a perfect 300 DPI invoice in milliseconds. Paid for itself on day one.”
Dave Kowalski
Master Electrician & Owner
Kowalski Industrial Electric · Denver, CO
“The designer template layouts look like a high-end corporate brand identity. My clients receive clean, beautifully formatted estimates with embedded QR payment codes and on-screen signatures. Best business tool on my phone.”
Elena Rostova
Senior Civil Consulting Engineer
Apex Geotechnical · Austin, TX
“Cancelled my $50/month QuickBooks subscription after years of feeling trapped. Offline Invoice Maker has no recurring fees, zero cloud bloat, and my client data stays private on my device. This is how software used to be built.”
Frank Gallagher
General Contractor
Gallagher Framing & Remodel · Seattle, WA
“Being able to track overdue balances, draft estimates, and capture signatures right on my phone saves me hours every week. Fast, reliable, and rock-solid offline in plant mechanical rooms.”
Thomas Dubois
HVAC & Commercial Refrigeration
Dubois Mechanical · Montreal, QC
“When I am in a commercial switchgear vault 3 stories below ground, there is zero cellular reception. Other apps freeze and refuse to generate PDFs without a cloud sync. This app compiles a perfect 300 DPI invoice in milliseconds. Paid for itself on day one.”
Dave Kowalski
Master Electrician & Owner
Kowalski Industrial Electric · Denver, CO
“The designer template layouts look like a high-end corporate brand identity. My clients receive clean, beautifully formatted estimates with embedded QR payment codes and on-screen signatures. Best business tool on my phone.”
Elena Rostova
Senior Civil Consulting Engineer
Apex Geotechnical · Austin, TX
“Cancelled my $50/month QuickBooks subscription after years of feeling trapped. Offline Invoice Maker has no recurring fees, zero cloud bloat, and my client data stays private on my device. This is how software used to be built.”
Frank Gallagher
General Contractor
Gallagher Framing & Remodel · Seattle, WA
“Being able to track overdue balances, draft estimates, and capture signatures right on my phone saves me hours every week. Fast, reliable, and rock-solid offline in plant mechanical rooms.”
Thomas Dubois
HVAC & Commercial Refrigeration
Dubois Mechanical · Montreal, QC
“My accountant was astonished at the cleanliness of the exported CSV and vector PDF bundles. The local SQLite encryption gave our enterprise clients 100% confidence that their billing rates never touch unauthorized third-party servers.”
Sarah Jenkins
Principal Tech Consultant
CloudScale Architecture · London, UK
“Doing emergency semi-truck repairs on the highway at 2 AM with spotty 3G. I tap out parts, labor, capture the driver's signature on the glass, and AirDrop the PDF right to their cab. Absolutely bulletproof.”
Carlos Mendez
Fleet & Heavy Diesel Repair
Borderline Mobile Fleet · Phoenix, AZ
“The payment QR code feature gets me paid on-site 80% faster. Customers scan the invoice directly from my phone screen and settle via bank wire before I even pack up my tools.”
Brian O'Connor
Plumbing Contractor
Rapid Flow Plumbing & Drain · Dublin, IE
“The typographic elegance is unbelievable. Most invoice software looks like it was designed in 1995. This feels like an Apple design award winner, perfectly customized for creative and technical trades.”
Amara Patel
Architectural Photographer
Patel Studios · Chicago, IL
“My accountant was astonished at the cleanliness of the exported CSV and vector PDF bundles. The local SQLite encryption gave our enterprise clients 100% confidence that their billing rates never touch unauthorized third-party servers.”
Sarah Jenkins
Principal Tech Consultant
CloudScale Architecture · London, UK
“Doing emergency semi-truck repairs on the highway at 2 AM with spotty 3G. I tap out parts, labor, capture the driver's signature on the glass, and AirDrop the PDF right to their cab. Absolutely bulletproof.”
Carlos Mendez
Fleet & Heavy Diesel Repair
Borderline Mobile Fleet · Phoenix, AZ
“The payment QR code feature gets me paid on-site 80% faster. Customers scan the invoice directly from my phone screen and settle via bank wire before I even pack up my tools.”
Brian O'Connor
Plumbing Contractor
Rapid Flow Plumbing & Drain · Dublin, IE
“The typographic elegance is unbelievable. Most invoice software looks like it was designed in 1995. This feels like an Apple design award winner, perfectly customized for creative and technical trades.”
Amara Patel
Architectural Photographer
Patel Studios · Chicago, IL
* Field use cases and customer feedback curated from independent contractors across electrical, mechanical, civil, and fleet repair industries.
Transparent pricing.
No hidden fees.
Free to download on iOS & Android. Test creating invoices with zero commitment. When you're ready to unlock unlimited billing, choose the plan that fits how you work.
Monthly Plan
Month-to-month flexibility. Full Pro capabilities. Cancel anytime with a tap in your App Store or Google Play account.
Yearly Plan
Our most popular plan for independent contractors and businesses. Full access for an entire year with 64% savings.
Lifetime Plan
Single one-time upgrade. No recurring subscriptions or renewal fees ever. Includes all future templates and major updates.
Included in all Pro plans:
Frequently asked
questions.
Everything you need to know about offline vector rendering, data privacy, and lifetime licenses.