TammyDevelopment access

Private accounting for Australian businesses.

Your books.
On your Mac.

The records behind your business, kept local. Review documents, reconcile statements, post journals and prepare GST/BAS drafts in one encrypted macOS workspace.

See how it works Release status

macOS 14 or later, Apple silicon

In development No public Mac download yet

Tammy
OverviewJournalsDocumentsBankingGST & BAS
Local accounting workspaceOn this Mac

Journals

Review the records behind every balance.

Office equipmentPosted
Monthly insuranceReviewed
Manual adjustmentDraft
Source evidenceRetained in the encrypted workspace
Illustrative interface. Synthetic examples, not a live account or actual application capture.
Works locally on your Mac Encrypted accounting records BAS drafts, not lodgement

A clear accounting process

From source records
to a balanced ledger.

Bring evidence into view, make deliberate accounting decisions, and keep the result inspectable.

  1. 01

    Bring in the source

    Import documents and bank-statement rows, or enter transactions yourself.

  2. 02

    Check the detail

    Review retained evidence and reconcile imported bank transactions.

  3. 03

    Keep the ledger

    Post balanced manual journals and inspect a trial balance.

  4. 04

    Prepare the draft

    Build a local GST/BAS workpaper for review, without submitting it.

These are distinct, human-controlled workflows, not a promise of automatic document-to-ledger posting.

The essentials, considered

Accounting without the noise.

Familiar tools, exact financial records and a place for the evidence that matters.

Journals and trial balance

Record balanced entries in a ledger you can inspect, rather than a black box.

Manual posting with visible accounting records

Source-document review

Keep invoices, receipts and other imported evidence close to the decisions they inform.

Encrypted local evidence and review states

Bank-statement reconciliation

Import statement rows and review matches against the records you keep.

File import, not automatic bank feeds

Customer invoicing

Prepare, review and issue invoices, with customer PDFs you can export.

No automatic email, payment collection or ledger posting

Designed to be understood

Know what changed.
Know why.

Keep a close eye on the books, with source evidence, explicit review states and financial records that remain available to inspect.

Explore the accounting process
Retained documentReviewed
Journal detail
AccountDebitCredit
Expense accountDr–
Business account–Cr
Balanced entry
Source. Review. Record.

Australian accounting, thoughtfully scoped

Prepared is not lodged.

Tammy helps you prepare local GST/BAS workpapers with reviewable calculations and retained sources. The current release does not submit tax reports to the ATO.

Understand the reporting boundary
01PrepareGather local GST evidence
02ReviewCheck the draft and its sources
03Draft, not lodgedNo ATO submission in this release

Local by design

Your data stays
in your hands.

Tammy stores accounting records in an encrypted workspace on your Mac. Some credentials live in macOS Keychain. There is no hosted Tammy business account or cloud sync in this release.

  • SQLCipher-encrypted local workspace
  • Explicit local document imports and exports
  • Optional, session-scoped local API and MCP access
Read our privacy policy

Made for the way you work

Australian by design.
Focused by choice.

AUD amounts, GST workflows, Australian chart-of-accounts conventions and local reporting drafts are part of Tammy’s current accounting foundation.

Built as a focused desktop workspace, not an all-purpose business platform.

Useful answers

The details matter.

No feature promises hiding in the fine print. Here is what Tammy does today, and what it does not.

See support and technical details
Does Tammy work without a cloud account?

Yes. The current macOS app keeps its accounting workspace in a local encrypted database. There is no Tammy cloud workspace or cross-device sync in this release. The public website itself is hosted online.

Can Tammy connect directly to my bank?

Tammy currently imports bank-statement rows from files for manual matching and reconciliation. Automatic bank feeds and bank-account syncing are not part of this release.

Can Tammy lodge my BAS with the ATO?

No. Tammy can prepare local GST/BAS workpaper drafts. Its SBR readiness flow is a synthetic, network-disabled simulator. A prepared or frozen draft is not a lodged BAS.

Can Tammy create and send invoices?

Tammy supports encrypted drafts, issuing an invoice and exporting a customer PDF. Issuing does not send an email, post a receivable or track payments.

What Mac do I need?

The current supported target is macOS 14 or later on Apple silicon (arm64). Tammy is development software, not a publicly qualified App Store release.

Can local tools integrate with Tammy?

A session-scoped local API and MCP adapter can be enabled from the native Integrations menu. Connected local clients can read permitted data and propose an editable invoice for review; they cannot save, issue or post transactions through that connection.

SOFT PRECISION · THE COMPLETE COLLECTION

Big care.
Small details.

Explore all fourteen studies shaping Tammy. These are design explorations, including proposed features, not a promise of current availability.

14 of 14 studies · Concept artwork
01A little clarity for your dayToday, transaction review and receipt capture.
A little clarity for your day. Today, transaction review and receipt capture. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
02Less repetition. More intention.Invoice editing, quick actions and an automation studio.
Less repetition. More intention.. Invoice editing, quick actions and an automation studio. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
03Softness, with a systemThe palette, typography, components and trust states.
Softness, with a system. The palette, typography, components and trust states. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
04A smoother way aroundOur folded-paper study: repeated work, made lighter.
A smoother way around. Our folded-paper study: repeated work, made lighter. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
05See the bigger pictureCash-flow and month-end design explorations.
See the bigger picture. Cash-flow and month-end design explorations. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
06Small moments, thoughtfully madeA companion direction for reviewing on the move.
Small moments, thoughtfully made. A companion direction for reviewing on the move. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
07From line item to the whole storySales, invoicing and item-tracking studies.
From line item to the whole story. Sales, invoicing and item-tracking studies. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
08Keep the evidence closeDocuments, banking and a readable activity trail.
Keep the evidence close. Documents, banking and a readable activity trail. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
09A precise foundationAccounting workspaces and their essential detail.
A precise foundation. Accounting workspaces and their essential detail. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
10Room for your businessThe broader business-workspace direction.
Room for your business. The broader business-workspace direction. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
11A considered way backWorkspace setup and recovery explorations.
A considered way back. Workspace setup and recovery explorations. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
12Real work is not a straight lineCorrections, interruptions and helpful recovery states.
Real work is not a straight line. Corrections, interruptions and helpful recovery states. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
13Make the first steps feel easySign-in, credit and import studies.
Make the first steps feel easy. Sign-in, credit and import studies. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.
14Care in the complicated momentsBAS, transfers and migration design studies.
Care in the complicated moments. BAS, transfers and migration design studies. Generated design concept.
Concept artwork, not a released product screen. Open image to inspect the full study.

Tammy is in development

Your books deserve
a quieter home.

Explore the local-first approach and contact the publisher about development access. A public Mac download is not available from this site yet.

Enquire about Tammy Get support
Version 0.1.0 · Development software · macOS 14 or later, Apple silicon