Simple invoice app
Send professional PDF invoices, save clients, convert estimates in one tap, and track paid or unpaid records manually. Built for solo service pros who do not want accounting software.
Last updated: July 13, 2026
Invoice
Direct answer
Billgami is a simple invoice app for solo service pros. It lets you save clients and service line items, send professional PDF invoices and estimates from iPhone, convert an accepted estimate into an invoice in one tap, and manually track paid, unpaid, or partial payment status. It is a one-time purchase (lifetime access), not a monthly subscription. It is not accounting software. Customers pay you directly through whatever method you already use.
50-word summary
For solo service pros who need a fast mobile paperwork tool: save clients, reuse service line items, send PDFs, convert estimates to invoices, track payment status. One-time purchase with lifetime access. Works offline. No accounting overhead, no payment processing, no monthly fees.
PDF invoices from iPhone in under a minute
One-time purchase, no monthly subscription trap
Estimates, invoices, and receipts in one workflow
Billgami fits solo operators who send invoices themselves and want the fewest possible steps between finishing a job and getting paid.
Billgami is intentionally narrow. If you need any of these, a different tool fits better and Billgami will feel too light.
For heavy field-service operations, Jobber or Housecall Pro fit better. For accounting, QuickBooks or Wave. Billgami stays in the invoice, estimate, PDF, and receipt lane on purpose.
Workflow
Save a client, add reusable service line items, send a PDF invoice or estimate, convert accepted estimates to invoices, and mark paid, unpaid, or partial status as customers pay you directly.
Add a client with name, address, contact, and any service notes. Every future invoice or estimate reuses those details, so you never retype them at the job site.
Build a library of the services you sell: house cleaning, trip fee, labor hour, materials markup. Drop them into any invoice with one tap and edit the numbers per job.
Preview the invoice, then share the PDF through the iPhone share sheet: email, iMessage, or any messenger. Works offline; the record queues locally until you have signal.
When the client approves an estimate, one tap turns the same document into an invoice. No rebuilding, no rekeying line items, no lost context between quote and bill.
Mark payment status as customers pay you through your existing method (cash, Zelle, check, card reader). Billgami never processes or holds the money.
Once an invoice is paid, generate a receipt-style record for the client. Keep the paper trail in your device, exportable any time.
| Feature | Billgami | Invoice Simple | Bookipi | QuickBooks |
|---|---|---|---|---|
| Made for solo service pros | Yes | Yes | Broad focus | No, full accounting |
| PDF invoice from iPhone | Yes | Yes | Yes | Yes |
| Estimate to invoice in one tap | Yes | Yes | Yes | Multi-step |
| Save clients and service items for reuse | Yes | Yes | Yes | Yes |
| Manual paid / unpaid / partial status | Yes | Yes | Yes | Automated only |
| Works offline at job site | Yes | Partial | Partial | No |
| No accounting bloat | Yes | Yes | Growing suite | No, full accounting |
| One-time purchase (lifetime access) | Yes | Subscription | Subscription | Subscription |
| No payment holds | Yes | Yes | Yes | N/A |
Comparison based on public App Store metadata and product pages as of July 2026. Every column reflects the product's own public positioning, not a claim about hidden features.
Six things Billgami actually ships, described honestly. If a competitor claims a feature that Billgami does not, we say so on this page instead of hiding it.
Save clients once and reuse them forever
Every client record lives in your device with name, address, contact, and notes. When you start a new invoice or estimate, you pick the client and every detail auto-fills. This is the single biggest time saver for repeat service work.
Save service line items and drop them into any document
Build a small library of the services you sell: standard cleaning, trip fee, labor hour, material markup. Adding a line item to an invoice becomes a tap, not a retype. Edit the numbers per job when the price changes.
Send a professional PDF from iPhone in under a minute
The PDF export is the core Billgami deliverable. Preview the document, tap share, and it goes out through email, iMessage, or any messenger your client uses. The PDF is print-clean and readable on both phone and desktop.
Turn an approved estimate into an invoice in one tap
When a client approves an estimate, one tap converts the same document into an invoice. The line items, client, and totals travel with it. No copy-paste, no lost context between the quote and the bill.
Track paid, unpaid, and partial status manually
Mark an invoice paid, unpaid, or partial as customers pay you through the method you already use. Billgami does not process or hold payments. The status is yours to control, so your records reflect reality, not an automated guess.
Works offline at the job site
Cellular signal is not always reliable. Billgami creates invoices, estimates, and PDFs offline; the records queue locally and sync when you have signal. The share sheet still works over local channels like AirDrop and iMessage relay.
A minimal invoice for a house cleaning visit. Billgami invoices follow this structure by default: client, service date, line items, subtotal, total, and payment method notes.
| Line item | Qty | Rate | Total |
|---|---|---|---|
Standard residential cleaning 3 bedrooms, 2 bathrooms, kitchen, living areas | 1 | $180.00 | $180.00 |
Add-on: interior windows Ground floor only | 1 | $45.00 | $45.00 |
Supplies Eco-friendly cleaning products | 1 | $15.00 | $15.00 |
| Subtotal | $240.00 | ||
| Total | $240.00 | ||
Example only. Line item pricing varies by market, job scope, and business. Confirm your own pricing before quoting a client.
A minimal estimate for a small handyman repair job. The same structure converts to an invoice with one tap once the client approves.
| Line item | Qty | Rate | Total |
|---|---|---|---|
Labor Estimated 2 hours at $75/hour | 2 | $75.00 | $150.00 |
Materials Cabinet hinges + wood glue | 1 | $35.00 | $35.00 |
Trip fee | 1 | $25.00 | $25.00 |
| Subtotal | $210.00 | ||
| Total | $210.00 | ||
Example only. Line item pricing varies by market, job scope, and business. Confirm your own pricing before quoting a client.
Data
Billgami is not built for enterprise field service. It is built for the very specific population of solo operators and side-hustle service pros in the US. Public data shows this population is large and underserved by heavy accounting tools.
| Metric | Value | Source |
|---|---|---|
| US nonemployer businesses (no paid employees, mostly solo operators) | ~28 million businesses (2022 filings) | IRS Nonemployer Statistics, 2024 |
| Small businesses that self-report administrative burden as a top-3 constraint | 48% of small firms | Fed 2024 Small Business Credit Survey |
| Independent workers in service occupations who invoice per job (approximate) | 6-8 million solo operators in construction, cleaning, personal, and repair services | BLS Current Population Survey, 2024 |
| US construction industry solo operators specifically | ~2.5 million self-employed construction workers | BLS CPS 2024 |
Sources
Billgami is a one-time purchase with lifetime access. Pay once, own the app, keep your invoice and client records exportable. No monthly subscription. No paywall that suddenly hides your history. See the pricing page for the current tier and any additional options.
Locked pricing
One-time purchase (lifetime access)
Own Billgami on your iPhone with no monthly fee. Your clients, service items, and invoice records stay yours. Exportable anytime.
See full pricingEvery incumbent in the invoice app category does something well. Billgami is not trying to beat all of them at everything. This section is honest about when to pick a different tool.
vs Invoice Simple
Invoice Simple is the strongest mobile invoice brand in the App Store, with 4.9 stars and over 120,000 reviews. If you want a large existing user base and template-heavy workflows, they are the safe pick. The most common complaint in their App Store reviews is subscription pressure: pricing changes, paywalls that appear over time, and features moving behind higher tiers. Billgami's one-time purchase avoids that trajectory entirely.
When to pick Invoice Simple: You want the biggest install base and are comfortable with a monthly subscription that may change over time.
vs Bookipi
Bookipi is a broader business app that has been adding AI features and expanding into adjacent workflows. That breadth is useful if you want one app for multiple business functions. It is less focused than Billgami if all you need is invoice paperwork. For solo service pros who like a narrow, predictable tool, Billgami's scope is intentionally smaller.
When to pick Bookipi: You want an AI-forward business suite and are OK with a growing feature surface area.
vs QuickBooks
QuickBooks is not a competitor to Billgami. It is a full accounting suite with tax, payroll, and bank feed integration. If you actually need bookkeeping, tax filing, or payroll, use QuickBooks. Most solo service pros do not need any of that just to send an invoice. Billgami sits before QuickBooks: the invoice paperwork tier without accounting overhead.
When to pick QuickBooks: You have employees, real bookkeeping needs, or tax workflows that require accounting-grade software.
Methodology
Billgami is built for a specific population: solo operators in service work who need invoice paperwork without accounting overhead. We studied App Store reviews across Invoice Simple, Joist, Invoice2go, Bookipi, and Housecall Pro, plus public data on how US solo service businesses actually operate. The consistent pattern from both sources: solo pros want a fast PDF, stable pricing, and control over their records. The most common frustrations are subscription pressure, payment holds, and feature bloat. Billgami's six features (client save, service items, PDF export, estimate-to-invoice conversion, manual status tracking, offline mode) are built directly against those pain points. Everything not on that list is intentionally not shipped. The pricing model (one-time purchase with lifetime access) is a direct response to the subscription complaints reviewers make against competitors.
Sources
Estimate and Quote Maker
The estimate workflow that feeds directly into Billgami's invoice.
Receipt Maker
Turn a paid invoice into a receipt-style record for the client.
For freelancers
The freelance-specific version of the simple invoice app workflow.
For handymen
Invoices and quotes for handyman work with parts and labor line items.
For contractors
Contractor estimates and invoices without field-service overhead.
Pricing
One-time purchase (lifetime access). See the tier and any add-ons.
Save clients, reuse service line items, send PDF invoices from iPhone, and stop paying for accounting features you never use. One-time purchase, lifetime access.
Last updated: July 13, 2026
