Best Invoice Apps for iPhone and Android (2026)

The best invoice app is the one that matches how you work: a solo freelancer sending three invoices a month needs something very different from a plumber who quotes on site and takes card payments in the driveway. Rather than crown a single winner, this guide groups the main invoice apps for iPhone and Android by type, explains what each type does well, and gives you a checklist to choose in ten minutes.

We cover free invoicing apps, accounting apps with mobile invoicing, payment-first apps, field service apps and browser-based tools that need no install at all. Features and prices change often, so treat this as a map and check each provider's current pricing page before you commit.

What to look for in an invoice app

Feature	Why it matters	Who needs it most
Clean PDF invoices	Professional look, accepted by accounts teams	Everyone
Online payments	Clients pay by card or bank from the invoice	Anyone who wants faster payment
Estimates and quotes	Convert an accepted quote to an invoice	Trades, agencies
Recurring invoices	Automatically bill retainers or subscriptions	Retainers, monthly services
Payment reminders	Automatic follow-ups on overdue invoices	Anyone with slow payers
Expense and receipt capture	Snap receipts for bookkeeping	Sole traders doing their own books
Offline mode	Create invoices without signal	Field and rural work
Tax handling	Correct VAT, GST or sales tax fields	Registered businesses
Data export	Move to another tool without losing history	Everyone

The main types of invoice app

1. Free invoicing apps

Examples include Zoho Invoice, which is free to use, and Wave, whose invoicing is free with fees charged when clients pay online. These suit freelancers and small businesses that want professional invoices, estimates and basic reminders without a monthly subscription.

• Strengths: no subscription, good-looking templates, client lists, basic reporting.
• Watch for: payment processing fees, limits on some features, and fewer options for complex tax setups in some countries.

Our roundup of free invoicing software compares the desktop and web versions in more detail.

2. Accounting apps with mobile invoicing

QuickBooks, Xero, FreshBooks and Zoho Books all have iPhone and Android apps for creating invoices, recording payments and capturing expenses, with the full accounting system behind them.

• Strengths: invoices flow straight into your books, bank feeds and reconciliation, tax reports, accountant access.
• Watch for: monthly subscriptions and more setup than you may need if you only send a few invoices.

Not sure you need full accounting? See invoice generator vs accounting software, and our Wave vs QuickBooks comparison if you are choosing between two popular options.

3. Payment-first apps

Square Invoices and PayPal invoicing are built around getting paid. Both let you send invoices from your phone, and Square also covers in-person card payments.

• Strengths: fast setup, clients pay in a couple of taps, in-person and online payments in one place.
• Watch for: processing fees on each payment and fewer bookkeeping features. Our guide to Square invoice fees shows how the costs work.

4. Field service and trade apps

Field service apps combine scheduling, job sheets, photos, estimates, invoices and on-site payment for plumbers, electricians, cleaners and other trades.

• Strengths: quote, do the job and invoice from the same record; staff scheduling; customer history.
• Watch for: higher monthly cost, often per user, and more features than a one-person business needs.

5. Browser-based invoice generators

A mobile-friendly invoice generator runs in your phone's browser with nothing to install. You fill in the form, download a PDF and share it.

• Strengths: no install, no account, no subscription, works on any phone or computer.
• Watch for: generally no payment tracking, recurring billing or automatic reminders, so you keep records yourself.

We explain the trade-offs in invoice maker vs template and walk through the process in how to make an invoice on your phone.

Comparison by business type

You are...	Best fit	Why
Freelancer, under 10 invoices a month	Free invoicing app or browser generator	Low volume does not justify a subscription
Freelancer with retainers	Free app with recurring invoices, or accounting app	Automatic monthly billing and reminders
Sole trader doing own books	Accounting app	Invoices, expenses and tax in one place
Market stall, salon or mobile service	Payment-first app	In-person card payments plus invoices
Trade business with staff	Field service app	Scheduling, job records and on-site invoicing
Occasional invoices	Browser-based generator	Nothing to install or pay for

Worked example: what payment fees really cost

Suppose you invoice $4,000 a month and every client pays by card through your app at an illustrative rate of 2.9% + $0.30 per payment, across 10 invoices.

• Percentage fees: $4,000 x 0.029 = $116.00
• Fixed fees: 10 x $0.30 = $3.00
• Monthly total: $119.00, or $1,428 a year

If half of those clients paid by bank transfer instead, at no fee, you would save around $714 a year. That is why it is worth offering bank transfer alongside card links, and why a "free" app is not always the cheapest once payments are included. Always check the app's current fee schedule rather than relying on the illustrative rate above.

How to choose in ten minutes

1. Count your invoices. Fewer than ten a month? Start free.
2. List must-haves. Recurring billing, estimates, card payments, offline mode, VAT or GST fields.
3. Check your country. Make sure the app supports your currency, tax fields and, where required, e-invoicing rules.
4. Test on your phone. Create and send a test invoice to yourself. Check how the PDF looks and how the payment page works.
5. Check export. Confirm you can export invoices and client data in a standard format.
6. Look at the full cost. Subscription plus processing fees plus per-user charges.

Keeping records, whichever app you choose

An app is not a substitute for keeping records. Tax authorities expect you to keep invoices and supporting documents for a set period. In the US, the IRS explains that records should generally be kept for at least three years after filing, longer in some situations, in its guidance on how long to keep records. Export your invoices regularly and store copies outside the app. Pair your invoice app with one of the receipt scanning apps if your invoice tool does not capture expenses. This is general information, not tax advice.

Common mistakes when picking an invoice app

• Choosing on price alone and ignoring payment fees.
• Paying for features you do not use, such as inventory or payroll.
• Not checking tax support for your country, then fixing invoices by hand.
• Getting locked in with no export option.
• Skipping two-factor authentication on an app that holds client and bank details.

iPhone vs Android: does it matter?

For most major invoicing and accounting apps, the iPhone and Android versions offer broadly similar features, so your choice of phone rarely decides the app. A few differences are worth checking:

• Tap to pay: some payment apps let you accept contactless cards directly on your phone, but support varies by phone model, operating system and country.
• Widgets and shortcuts: handy for logging time or starting an invoice quickly.
• File handling: check how easily the app saves PDFs to your phone and shares them by email or messaging apps.
• Tablet layout: if you invoice from a tablet, look for an app that uses the larger screen well.

Test the specific app on your own phone before moving all your clients over.

Setting up your first invoice app

1. Add your business name, logo, address and any tax registration number.
2. Set your default payment terms and due date rule, such as 14 days.
3. Add bank details and connect a payment method if you want online payments.
4. Choose a numbering format, for example INV-2026-001, and stick to it.
5. Add your regular clients and the services you invoice most.
6. Send a test invoice to yourself and pay it to check the client experience.
7. Turn on reminders for overdue invoices.

If you are switching from spreadsheets or templates, continue your existing invoice number sequence so there are no gaps or duplicates in your records.

When to upgrade from a free option

A free app or browser generator is usually enough until you notice one of these signs: you are spending more than an hour a month matching payments to invoices, you need recurring invoices for retainers, an accountant asks for proper books, or you hire staff who also need to invoice. At that point, a paid accounting or field service app often pays for itself in saved admin time.

If you only need to send the occasional invoice from your phone, you may not need an app at all. Our free invoice generator works in any mobile browser, needs no sign-up, and lets you download a finished invoice as a PDF to share by email or message.