Invoice Rex

$4.99/mo or $49.99/yr (14-day free trial); included with Setapp

Price checked at source September 18, 2026.

Invoicing and lightweight accounting for Mac, iPhone, and iPad, from Charlie Monroe Software (Downie, Permute) — synced privately via iCloud.

Our take

Built from scratch on Apple’s latest frameworks rather than ported from an older codebase — it replaces the developer’s older UctoX app, which is also why it requires macOS 14+. Beyond invoices, it tracks bank statements, cash receipts, and journey logs, all synced through your own iCloud account with nothing stored on the developer’s servers, per the developer. Reviews are mixed specifically on the invoice-template editor — several App Store and Setapp reviewers call it confusing even while praising the rest of the app.

Visit software.charliemonroe.net ↗

Price: $4.99/mo or $49.99/yr (14-day free trial); included with Setapp
License: Proprietary
Requires: macOS 14.0 or later; iOS/iPadOS 17+ for the companion apps.
Get it via: Mac App Store · Setapp · Direct
Developer: Charlie Monroe Software

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Who made this

Charlie Monroe Software

Also makes Permute

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What it does

Customizable invoice templates

Editable print templates for invoices, estimates, and statements — reviewers note the editor has a learning curve.

iCloud sync, no third-party servers

Syncs Mac, iPhone, and iPad through the user’s own iCloud account, per the developer.

Bank statement & cash receipt tracking

Beyond invoices, tracks statements, receipts, and journey logs in one place.

Native on every platform

One codebase built with Apple’s current frameworks across macOS, iOS, and iPadOS, per the developer.

The deal

$4.99/mo or $49.99/yr, 14-day free trial
Included at no extra cost with a Setapp membership

Invoice Rex — questions people ask

Is Invoice Rex free?

A 14-day free trial, then $4.99/mo or $49.99/yr; included at no extra cost with a Setapp membership.

Does Invoice Rex work on iPhone and iPad too?

Yes — one subscription covers Mac, iPhone, and iPad, synced via iCloud.

Is Invoice Rex free?

Invoice Rex costs $4.99/mo or $49.99/yr (14-day free trial); included with Setapp.

Does Invoice Rex work alongside a notch app like Alcove?

Yes — Invoice Rex lives in the screen, so it runs happily alongside any Dynamic Island hub or notch app.

Where can I download Invoice Rex?

Invoice Rex is available via Mac App Store, Setapp, Direct.

Reviews

No public ratings yet. Reader reviews are coming to Kitsmith soon.

Listing hand-verified September 18, 2026 from the developer's site and public sources.

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Screen Verified September 18, 2026