Fluency Simulator

Rehearse the conversation your job depends on, offline.

macOS 26 or later Apple silicon and Intel One purchase · $10 Complete app — nothing locked No account Apple notarizedDeveloper ID signed

Website Direct edition

Pay once. Fully unlocked. Verified by Apple.

This website download is a separate direct-distribution build from the Mac App Store edition. It contains no StoreKit purchase flow or subscription screen: every feature is available after the one-time website purchase.

Apple notarized this exact disk image after an automated malware check. It is signed with the publisher's Developer ID and its notarization ticket is stapled to the download, so Gatekeeper can verify it even when your Mac is offline.

How signing, notarization and installation work

Version: 1.1 (build 125)
Released: 2026-08-22
Requires: macOS 26 or later
Architecture: Apple silicon and Intel
Download: 2.1 MB DMG
Apple check: Notarized · Developer ID signed
SHA-256: c3a424c5be63835f7a6dc18f665b8943d5242700ded02865ddf3e7e01f73fc45

What it is

What Fluency Simulator does

Role-play work conversations against an on-device AI with an animated avatar. The conversation engine, speech recognition, speech synthesis and model all run locally, so there are no API keys, no per-token cost and no recording of your practice leaving the machine.

Written for people whose career runs through a second language — doctors, nurses, lawyers, sales staff, managers, support agents. You pick a profession and a scenario and hold the conversation aloud against an animated avatar.

Everything runs on-device using Apple's frameworks: recognition, synthesis, and the model driving the exchange. No API keys, no cloud, no per-token bill, and no recording of a clumsy rehearsal sitting on someone else's server.

How it does its job

Fully offline pipeline

Speech recognition, synthesis and the conversation model all run locally.

Professional scenarios

Situations drawn from real working contexts rather than tourist phrasebooks.

Animated avatar

A face to speak to, which changes how the practice feels compared to a text box.

What it doesn't do

An on-device model is smaller than a frontier API. It is a rehearsal partner, not a language tutor with judgement.

Native, local-first, and yours

Fluency Simulator is a native Mac app distributed as a complete, fully activated download. No subscription, no account, no locked features, no tracking.

Buy & download

Get Fluency Simulator

Choose $10 for one app, $20 for two different apps, or $49 for every published app through Stripe's hosted checkout. Download on the confirmation page or open the delivery email on your Mac. Each link is single-use; your email shows its exact expiry. Keep the installer for future use. If your link expires or the download fails, ask for a replacement link with your receipt; do not buy again.

Common questions

What is Fluency Simulator?

Conversation practice for professionals whose career depends on a second language - doctors, nurses, lawyers, salespeople, managers, support staff. The conversation engine, speech recognition, speech synthesis and AI all run on device. No API keys, no cloud, no per-token bills.

Who is Fluency Simulator for?

Fluency Simulator is for Mac users looking for language & speech. Rehearse work conversations aloud against an on-device AI avatar - offline, no API keys, no per-token cost.

Which Macs can run Fluency Simulator?

Fluency Simulator requires macOS 26 or later. Supported architecture: Apple silicon and Intel. Check About This Mac before purchasing.

Is this the same Fluency Simulator edition as the Mac App Store version?

No. The Mac App Store edition can include Apple's in-app subscription system. The website Direct edition is a separately signed build with no StoreKit purchase flow: one website purchase unlocks the complete app with no recurring charge.

Is Fluency Simulator the full version, or are features locked?

The download is the complete app. There is no subscription, no locked tier, no account, and no trial timer — every feature is included.

How do I get Fluency Simulator?

Choose $10 for one app, $20 for two different apps, or $49 for every published app through Stripe's hosted checkout on this page. Download links are delivered on the confirmation page and by email. Each link is single-use; its exact expiry is shown in your delivery email. Keep the installer. If the link expires or a download fails, contact support@macossoftware.com with your receipt instead of buying again.

Is the Fluency Simulator Direct edition notarized by Apple?

Yes. Version 1.1 is signed with a Developer ID certificate, notarized by Apple, and distributed with a stapled notarization ticket. Its published SHA-256 checksum is c3a424c5be63835f7a6dc18f665b8943d5242700ded02865ddf3e7e01f73fc45.