About this app

Fluency Simulator turns language practice into realistic, spoken role-play. Pick your profession, choose a language, and hold a real conversation with an on-device AI that plays the other party — a patient, a client, a customer — while an animated avatar speaks back to you. Built for professionals whose careers depend on a second language: nurses, doctors, lawyers, real-estate agents, salespeople, managers, and more. WHAT YOU GET • 40+ professions across Healthcare, Legal, Business & Sales, Architecture & Engineering, Management, Science, Marketing, and Hospitality • Practice any language pair, from CEFR A1 (beginner) to C2 (proficient) • Speak aloud and hear a natural, high-quality on-device voice reply • An animated avatar that reacts as it talks • A feedback report after every session: accuracy, vocabulary, role-fit, and a concrete next goal • Your history and progress, tracked over time SUBSCRIPTION Fluency Simulator is free to download. Access to unlimited role-play sessions and the other Fluency Basic features listed above requires a separate auto-renewable monthly subscription. Pricing is shown in the app before purchase. You can manage or cancel at any time in Apple Account settings. 100% PRIVATE — WORKS FULLY OFFLINE • The conversation, speech recognition, and speech all run on your device • No account, no sign-up, no cloud, no analytics • Nothing you say or type ever leaves your device Requires an Apple Intelligence–capable device. The microphone and speech recognition are used only to hear your spoken replies; audio is processed on device and never stored. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.lukekevinmclaughlin.com/privacy

Latest release

What’s New

Version 1.1 Jul 31, 2026

Introducing Pro — an optional subscription (annual or monthly, both with a 7-day free trial) that unlocks premium features. Everything you already use stays free, and nothing is ever deleted. Also includes bug fixes and performance improvements.

Audience growth

Ratings growth

Steady

7-day gain +0

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30-day gain +0

US rating-count history

0 ratings

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking