Invoice Rex

Invoice Rex

Be the king of your invoices. A powerful, beautifully simple invoicing tool for macOS, iOS and iPadOS — synced securely via iCloud.

macOS 14+ iOS & iPadOS 17+ Free 14-day trial
Download on the Mac App Store Download on the App Store
Free for 14 days
Then $4.99/month or $49.99/year
Includes macOS, iOS and iPadOS apps

What is Invoice Rex?

Issue invoices.
Rule your business.

Invoice Rex is a powerful invoicing tool that lets you issue invoices, customize their appearance, and track all your business documents — while syncing seamlessly between all your devices via iCloud. No content is ever stored on our or anyone else's servers.

Beyond invoicing, Invoice Rex helps you track bank statements, cash receipts, storage records, journey logs, and much more — everything your business needs in one place.

macOS
📱 iPhone
📲 iPad
☁️ iCloud Sync
Invoice Rex on Mac

What makes Invoice Rex special?

Built for the Apple ecosystem

Designed for freelancers and small businesses who want a beautiful, native tool — not another web app.

Simplicity First

Designed with your comfort in mind — simple to use, yet powerful. A full user guide is always a tap or click away, and support is built right into the app.

☁️

iCloud Sync

Your accounts sync seamlessly across all your devices — Mac, iPhone and iPad — via iCloud. Nothing is stored on our servers. Your data stays yours.

🎨

Fully Customizable

Tailor invoice, bill, and document templates exactly to your brand. Fonts, colors, layouts — make every document look exactly the way you want it.

🔗

Unified Platform

Written from scratch using Apple's latest technologies. One codebase, one UI — consistent across macOS, iOS and iPadOS, with no feature left behind on any platform.

📄

Beyond Invoices

Track bank statements, cash receipts, storage records, journey logs, and other business documents — all in one organized place.

🔒

Private by Design

All sync happens through your own iCloud account. No third-party servers ever touch your business data.


See It in Action

At home on every screen

A native experience crafted for Mac, iPhone and iPad — not a web app squeezed into a window.

Invoice Rex macOS 1
Invoice Rex macOS 2
Invoice Rex macOS 3
Invoice Rex macOS 4
Invoice Rex iOS 1
Invoice Rex iOS 2
Invoice Rex iOS 3
Invoice Rex iOS 4
Invoice Rex iPadOS 1
Invoice Rex iPadOS 2
Invoice Rex iPadOS 3

Get Invoice Rex

Simple subscription pricing

Try it free for 14 days. Subscribe only if you love it — cancel any time.

Monthly
$4.99/mo
Billed month to month. Cancel any time.
Download on the App Store
Best value
Annual
$49.99/yr
That's just $4.17/mo — save ~16% vs monthly.
Download on the App Store
Free Trial
14 days
Full access, no credit card required. Decide after you've tried it.
Download on the App Store

Support

Frequently asked questions

I have purchased UctoX 2. What happens now?

UctoX 2 was released in 2015 and updated for 10 years. A lot has changed since then — Apple has migrated to a new programming language and UI framework. UctoX 2 is likely to keep working for a long time, but to provide a better experience across all platforms without duplicating every feature, Invoice Rex was built from scratch using the latest Apple technologies — hence the macOS 14+ requirement.

To import your UctoX account, select File → Export for Invoice Rex in UctoX, then choose the option to import from UctoX when adding an account in Invoice Rex.

As Invoice Rex is subscription-based, there is no upgrade pricing. If you purchased UctoX after January 1, 2024, contact us and we will provide you with one free year of Invoice Rex.

If you wish to continue using UctoX 2: if you purchased it via the App Store, reinstall it from the Purchases tab. If you purchased it directly, the latest version is available at software.charliemonroe.net/trial/uctox/latest/.

I'd like Invoice Rex to support my language!
Contact us using the in-app support dialog (via the Help menu on macOS, or the action button on the account selection screen on iOS/iPadOS). We offer 1 free year of Invoice Rex in exchange for a translation.
How does iCloud sync work? Is my data private?
Invoice Rex syncs exclusively through your own iCloud account using CloudKit. Your data is never stored on our servers or any third-party servers — it goes directly between your Apple devices through Apple's infrastructure.
Can I use Invoice Rex on all my devices with one subscription?
Yes — one subscription covers Invoice Rex on all your Apple devices: Mac, iPhone and iPad. Everything stays in sync automatically via iCloud.
What happens when my trial ends?
After the 14-day free trial, you can choose a monthly ($4.99/mo) or annual ($49.99/yr) subscription to keep using Invoice Rex. If you don't subscribe, the app remains installed but you won't be able to create new documents until you start a plan.