Top Invoice Apps for Freelancers

You finish the project. The client is happy. You pull out your phone to send the invoice. That moment, right there, is when an invoice app either earns its place or embarrasses you.

A clunky app means fumbling through menus while the client is still standing in front of you. A good one gets you in and out in under two minutes. Invoice sent. Done.

This guide is specifically about mobile invoicing: apps that work on your phone as well as they work on a desktop, not desktop tools that technically have a mobile version. That distinction matters more than any feature list.

Why Freelancers Invoice From Their Phones

The assumption that invoicing happens at a desk is outdated. Photographers send invoices right after a shoot. Consultants bill clients between meetings. Designers wrap up a revision call and want the invoice in the client’s inbox before they step away from the table.

Mobile invoicing is not about convenience. It is about timing. An invoice sent within an hour of project delivery gets paid faster than one sent three days later when you finally get back to your laptop. The faster you invoice, the fresher the work is in the client’s mind and the shorter the payment cycle.

The question is not whether to invoice from your phone. It is which app makes that fast and professional.

Mobile-First vs. Mobile-Available: Why This Matters

There is a difference between an app built for mobile and a desktop tool that runs on a small screen. Both exist. Only one is worth using when you are standing in front of a client.

A mobile-first invoice app is designed from the ground up for thumb navigation, small screens, and speed. Every tap has a purpose. You can create a new invoice, fill in the line items, and hit send in under two minutes without pinching to zoom or hunting for a buried menu.

A desktop tool ported to mobile often works, technically. But it was designed for a mouse and a keyboard. Forms feel cramped. Navigation requires multiple screens where one would do. You spend time managing the app instead of the invoice.

The real test: open the app. Tap “new invoice.” Start the clock. If you are still filling in fields after two minutes, the app is not built for mobile.

What to Look for in a Mobile Invoice App

Not all invoicing features matter equally on a phone. These are the ones that do.

Launch-to-invoice speed. How many taps from opening the app to a filled, sendable invoice? Three is excellent. Seven is too many.

iOS and Android availability. Both platforms must be supported. An iOS-only tool locks out half the market, including a significant share of freelancers in emerging markets who use Android.

Offline functionality. Field workers lose signal. An app that requires connectivity to create an invoice is unreliable for on-site work.

Payment collection built in. Creating an invoice is step one. Collecting payment is step two. Apps that handle both mean the client can pay directly from the invoice link. Apps that only create PDFs add friction for everyone.

Notifications. You should know when a client opens the invoice and when they pay. Real-time push notifications replace the manual “did you receive my invoice?” email.

Multi-currency support. International clients are the norm, not the exception. An invoice app without multi-currency support is already behind.

Recurring and subscription billing. Retainer clients should not require manual invoices every month. Automation saves time and reduces human error.

Price. Free plans with meaningful limits outperform bloated paid plans for most solo freelancers. Know what is actually free and what is gated.

The 7 Best Invoice Apps for Freelancers

Invoice Simple: Best for Speed and Simplicity

iOS: Yes (4.9 stars, 115,000+ reviews). Android: Yes (4.8 stars, 117,000+ reviews).

Invoice Simple is the closest thing to a purpose-built mobile invoicing tool in this category. It was designed for phones first. The interface is clean, the navigation is direct, and the experience of creating an invoice is genuinely fast.

Open the app. Add a client. Add a line item with price. Hit send. You are done in under two minutes without a tutorial. That is not a marketing claim. It is the actual experience, which is why the app has 500,000+ users and some of the highest app store ratings in the category.

The mobile-specific strengths are real. You can convert an estimate to an invoice in a single tap. You can pull a client from your contact list without re-entering details. Email delivery from the app is seamless. You get read notifications when the client opens the invoice.

The limitations are also real. Offline functionality is limited. There are no recurring invoices. The free tier is very restricted, and the unlimited plan runs around $19.99 per month (as of June 2026, verify current pricing at invoicesimple.com). Invoice Simple is an invoice creator, not a payment collection platform. Clients receive a PDF, not a payment link. That means follow-up on payment is still on you.

Best for: Photographers, tradespeople, field service workers, and any freelancer who values speed above all else and bills clients in person or immediately after a job.

Square Invoices: Best for Freelancers Who Take In-Person Payments

iOS: Yes. Android: Yes.

Square Invoices occupies a different category from most invoice apps. It connects invoicing with Square’s payment processing, which means a freelancer can create an invoice, take a card payment in person using Square Reader, and track everything in one place.

On mobile, the app handles recurring invoices, payment schedules, automatic reminders, and real-time notifications. Clients can pay by card, ACH, Apple Pay, or Google Pay directly from the invoice link. You can create and edit invoices offline, though offline payments are not available.

The pricing structure is worth understanding. The core invoicing features are free, but payment processing fees apply when clients pay: 2.6% + $0.15 for in-person card payments and 3.3% + $0.30 for online payments (as of June 2026, verify current rates at squareup.com). There is no monthly subscription for basic use. A Square Plus plan at approximately $19.99 per month unlocks custom templates, payment schedules, and lower processing rates.

The app is particularly strong for freelancers who do any in-person work: fitness trainers, consultants who present at client sites, photographers who hand off a card at the end of a shoot. The Square ecosystem handles the full transaction.

The limitation is geographic. Square is primarily built for the US, Canada, Australia, Japan, and the UK. International freelancers or those billing clients outside those markets will find significant gaps.

Best for: US-based freelancers and service providers who invoice and take payment in-person, or who want invoicing and payment processing in a single ecosystem.

Wave Invoicing: Best Free Option With Genuine Mobile Support

iOS: Yes (4.5+ stars). Android: Yes (4.5+ stars).

Wave is the most credible free invoicing tool with real mobile support. The core features: unlimited invoices, unlimited clients, expense tracking, and basic accounting are permanently free. There are no invoice limits, no client limits, no feature timeouts.

On mobile, Wave does the essentials well. You can create and send invoices, scan receipts, set automatic payment reminders, and see your outstanding balances. The mobile app is clean and functional for the core invoicing workflow.

The honest limits: Wave’s mobile app is not a full replacement for the desktop. Accounting reconciliation, detailed reporting, and chart of accounts management are clumsier or unavailable on phone. The app is strong for invoicing and receipt capture, not for running a full financial review from your phone.

Payment processing fees apply when clients pay by credit card, and Wave makes its money on those transactions. The Pro plan at approximately $16 per month adds auto bank imports, receipt scanning improvements, and waives processing fees on the first ten payments per month (as of June 2026, verify current pricing at waveapps.com).

Free plan customer support is email-only with slow response times. That is a meaningful tradeoff if you run into an issue before an important invoice goes out.

Best for: Solo freelancers who want genuinely free invoicing without a monthly subscription, bill fewer than 20 clients per month, and can live without advanced accounting on mobile.

Zoho Invoice: Best Fully Free App With Multi-Currency

iOS: Yes (well-reviewed). Android: Yes (well-reviewed).

Zoho Invoice is permanently free and includes features that most paid apps charge for. Multi-currency invoicing covering 160+ currencies, a client self-service portal, automated payment reminders, time tracking for up to three projects, and expense tracking. All of it, at no cost.

The mobile apps for iOS and Android are consistently well-reviewed. For a single freelancer sending invoices to international clients, the combination of zero cost and multi-currency support is difficult to match.

The key limits: 500 invoices per year (roughly 42 per month) and a “Powered by Zoho Invoice” branding on every invoice. The 500-invoice cap is fine for most solo freelancers. The branding is a minor friction point with corporate clients who may raise questions about it.

Time tracking is limited to three projects. If you manage more than three active clients with billable hours, Zoho Invoice’s time tracking will not cover your needs.

Zoho Invoice is also GDPR-compliant, which matters for European freelancers working with EU-based clients. For more complex accounting, Zoho Books is the paid upgrade path.

Best for: Freelancers starting out, budget-conscious independents, and anyone billing international clients who cannot justify a paid tool yet.

FreshBooks: Best for Professionals Who Need More Than Just Invoicing

iOS: Yes. Android: Yes.

FreshBooks is a full invoicing and accounting platform that happens to have one of the better mobile apps in this category. It is not mobile-first. It started as a desktop product. But the mobile experience is polished enough to warrant honest evaluation here.

On mobile, you can log billable hours using the built-in time tracker and convert them to a ready-to-send invoice in one tap. You can scan receipts, track mileage, review financial reports, and manage clients. The payment experience for clients is clean: card, ACH, Apple Pay, and Google Pay all work directly from the invoice link.

The mobile app is genuinely useful for freelancers who do most of their invoicing from a desk but need to log time or capture expenses on the go. For purely mobile invoicing, it is more powerful than necessary and the navigation reflects that.

Pricing starts at approximately $23 per month for up to five clients (Lite plan), $43 per month for up to 50 clients (Plus), and $70 per month for unlimited clients (Premium), as of June 2026. Verify current pricing and promotional offers at freshbooks.com. The five-client limit on Lite means most active freelancers will need Plus within a few months of starting.

Best for: Freelancers who bill by the hour, need time tracking and expense management alongside invoicing, and want everything in one tool even if the price reflects that.

Invoice Ninja: Best Open-Source App for Technical Freelancers

iOS: Yes. Android: Yes.

Invoice Ninja is open-source, which makes it unique in this category. The mobile apps for iOS and Android support offline data entry with synchronization once you reconnect. For field work where connectivity is unreliable, that offline capability is a genuine advantage.

The feature set is broad: recurring invoices, auto-billing, time tracking, expense management, client portal, and 50+ payment gateway integrations. The free cloud plan covers up to 50 clients. The Pro plan removes that cap for approximately $10 per month (as of June 2026, verify at invoiceninja.com). Self-hosting is also available for freelancers who want full data ownership.

The honest mobile limitation: the app is less polished than Invoice Simple or Wave. Users consistently note that the interface is functional but slower and visually denser than dedicated mobile-first apps. Creating an invoice in under two minutes is achievable once you know the app, but the initial learning curve is steeper than the alternatives.

For developers, IT consultants, or any technically capable freelancer who values control over their data and wants the flexibility to self-host, Invoice Ninja occupies a category of its own.

Best for: Developers and tech freelancers who want open-source control, self-hosting capability, and a wide range of payment gateway options.

Ruul: Best for End-to-End Payment Collection Without a Company

Mobile access: Via browser on any device (app.ruul.io). No native iOS or Android app is required. The platform is fully responsive and accessible from any phone or tablet.

Ruul is a different kind of tool. It is not just an invoice creator. It is a full payment platform that handles the entire cycle from invoice to payout.

Here is what makes it structurally different from every other app on this list. Ruul acts as your Agent of Record. You create an invoice through Ruul, and Ruul issues it to your client as the legal counterparty. Your client receives a business-ready invoice they can process through their standard finance workflow. This means you can invoice clients globally without needing a registered company of your own. That matters enormously for freelancers who work with enterprise clients whose procurement teams require formal invoices with a registered entity on them.

On mobile, you log in at app.ruul.io from your phone browser. The platform is responsive. You can create a single invoice, a recurring invoice, or a subscription-based invoice for retainer clients, all from your phone. Clients pay by card or bank transfer. Ruul collects the payment and pays you out within one business day in 140+ currencies, including crypto if you prefer. You can read more about payout options at ruul.io/get-paid.

Payment tracking is built in. You see when the client views the invoice, when they approve it, and when payment settles. Automatic reminders go out so you do not have to chase. All your transaction records are stored centrally for tax purposes at ruul.io/stay-organized-tax-ready. If you want to get paid in crypto, Ruul handles that too without requiring your client to change how they pay, via ruul.io/crypto-payout.

The pricing model is different from subscription tools. No setup cost. No monthly fee. Ruul takes a 5% commission per transaction. For a freelancer sending five invoices a month worth $1,000 each, that is $50 in total cost versus $23 to $70 per month for a FreshBooks subscription. The math depends on your volume and invoice sizes.

The key distinction from native mobile apps: Ruul is accessed through a browser, not a downloaded app. For most freelancers that is not a meaningful limitation, but if you specifically need an offline-capable native app for field work, Ruul is not that.

Best for: Freelancers invoicing enterprise clients, international professionals who need legally compliant invoices without a registered company, and anyone who wants the full payment cycle handled end-to-end.

Comparison Table

App	iOS	Android	Free Tier	Payment Collection	Offline Mode	Multi-Currency	Best For
Invoice Simple	Yes	Yes	Limited (3 invoices)	No (PDF only)	Limited	Yes	Speed, field workers
Square Invoices	Yes	Yes	Yes (fees apply)	Yes	Create only (no payments)	Limited (US focus)	In-person + digital payments
Wave Invoicing	Yes	Yes	Yes (unlimited)	Yes (fees apply)	No	Yes	Zero-cost invoicing
Zoho Invoice	Yes	Yes	Yes (500/year)	Yes	No	Yes (160+)	Free multi-currency invoicing
FreshBooks	Yes	Yes	Trial only	Yes	No	Yes	Time tracking + accounting
Invoice Ninja	Yes	Yes	Yes (50 clients)	Yes (50+ gateways)	Yes	Yes	Open-source/self-hosted
Ruul	Browser	Browser	No (5% per transaction)	Yes (full cycle)	No	Yes (140+)	End-to-end payment without a company

Pricing and features as of June 2026. Verify current details at each provider’s official website before subscribing.

Which App for Which Freelancer

Photographer or field service worker. You need speed more than anything. You invoice immediately after the job, often while the client is still present. Invoice Simple is the right tool. Open, invoice, send. Under two minutes. If you also want to take card payments in-person, Square Invoices is the better fit.

Digital nomad or consultant with international clients. Multi-currency is non-negotiable. Zoho Invoice covers 160+ currencies at zero cost. FreshBooks handles multi-currency on paid plans with a more polished client experience. Ruul covers 140 currencies with full payment collection and no company required.

Developer or technical freelancer. Invoice Ninja gives you open-source control, self-hosting, and 50+ payment integrations. You can modify the platform to your exact requirements and own your data entirely.

Freelancer without a registered company billing enterprise clients. This is where Ruul specifically solves a problem the other apps cannot. They create invoices. Ruul creates legally valid invoices as the counterparty. An enterprise client’s procurement team can process a Ruul invoice without asking for your company registration number.

Just starting out, tight on budget. Wave or Zoho Invoice. Both are genuinely free for the core invoicing workflow. Wave has no invoice limits. Zoho Invoice has no paid tier at all.

Building a retainer business. Subscription billing and recurring invoices matter. FreshBooks, Ruul, and Wave all support recurring invoices. Ruul’s subscription billing automates the full payment cycle, not just invoice creation.

The 2-Minute Test

Every app on this list can technically create an invoice on a phone. That is not the question. The question is whether you can do it in under two minutes without frustration.

The real experience: open the app, create a new invoice, add a client, add a service with a price, add tax, and hit send. Time that. If it takes more than two minutes the first time you do it as a new user, the mobile experience is not good enough for in-the-moment invoicing.

Invoice Simple and Square Invoices pass this test consistently. Wave and Zoho Invoice pass it for basic invoices. FreshBooks is close but slightly heavier. Invoice Ninja takes longer initially. Ruul, accessed through a phone browser, is designed to be fast once you know the platform.

The fastest invoice is the one that actually gets sent.

Most Invoice Apps Stop at the Invoice

There is a gap between creating a professional invoice and getting paid. Most apps close that gap partially. They create the document. They send the email. Payment tracking after that is inconsistent, and many apps do not collect payment at all, they just generate a PDF and hope the client acts on it.

If you need your phone to handle the full payment cycle, from invoice sent to payment collected to money in your account, most apps only do the first part. Ruul does all of it, without requiring a registered company.