About
About Invoicewell
Invoicewell is a pay-once Mac app for invoices, made and supported by one person, Ayesha Gagan, who also makes the Mac apps Chargeberry and Shelfy.
Why Invoicewell exists
Most invoicing software is a website with a monthly bill. You pay every month to type the same details into the same boxes, and your invoices live on someone else’s servers. Invoicewell is the opposite: a real Mac app, bought once, with your invoices kept on your Mac.
It also does something new. Invoicewell knows what an invoice still needs before it can go out, and it can tell an AI assistant like Claude. So you can ask for an invoice in one sentence, answer the one or two questions that are really open, and check the finished invoice. You still press Send yourself.
Who makes it
Ayesha Gagan is an independent Mac app developer who makes small, pay-once apps for the Mac: Invoicewell, Chargeberry (a battery charge limiter for MacBooks) and Shelfy (a shelf for files on your Mac). Ayesha builds in public on X (@ayeshagagan), and the personal site is ayeshagagan.com.
How it’s built
- Written in
- Swift and SwiftUI, for the Mac only
- Your data
- Stored on your Mac, never on our servers
- Account
- None. Open it and start
- AI assistants
- Through the Model Context Protocol (MCP), with 18 tools. Off until you turn them on
- Needs
- macOS 14 Sonoma or later, on Apple silicon and Intel Macs
- Signed
- With a Developer ID, and notarized by Apple
- Price
- $19.99 once, for up to 3 of your Macs, with free updates
- First released
- November 1, 2026
How it’s tested
Every release runs 328 automated tests, then the real app checks itself: it opens every screen and setting, edits invoices the way a person would, and checks the result, 602 checks in all. The AI part is tested with real Claude: 14 conversations, from a new client to “delete all my invoices”, each checked against the invoice that should come out.
According to Invoicewell’s own tests, 328 automated tests and 602 in-app checks passed on the release build of version 1.0.1, and Claude got 14 of 14 invoicing conversations fully right, with both Claude Sonnet and Claude Haiku.
What Invoicewell promises
- You press Send. Assistants can prepare an invoice and the email, but only you send anything.
- Your invoices stay yours. On your Mac, exportable at any time, and never sent to us.
- No subscription. One payment, every feature, free updates.
- Honest comparisons. The comparison pages on this site say where other apps are better, and their facts come from those apps’ own websites, with the date they were checked.
Get in touch
Email adgan.business@gmail.com for help, a lost license key or anything else. See Contact and support for what to include so it’s quick to sort out.
Questions about Invoicewell itself
Who is behind Invoicewell?
One person: Ayesha Gagan, an independent Mac app developer, who makes the app and answers the support email. Write to adgan.business@gmail.com and the person who built it reads it.
How new is Invoicewell?
Version 1.0 was released on November 1, 2026. The current version is 1.0.1. Every release is listed on the changelog and in the RSS feed.
Will Invoicewell keep being updated?
Yes. Updates are free for everyone who bought it, and the app checks for them itself (it uses Sparkle, the update system many Mac apps use). Your invoices stay on your Mac whatever happens, and you can export all of them at any time.
Is Invoicewell open source?
No. It’s a paid app with a one-time price. Your data isn’t locked in, though: invoices export as PDFs, reports as CSV, and everything as one backup file.
Why make an invoice app that AI assistants can use?
Because most of an invoice is things the app already knows: your details, the client’s address, the next number, your tax rate, the hours you tracked. An assistant only has to ask for the few things that are really missing, so “invoice Harbour Labs for October” can be the whole job.
