Never rehearse
alone again

The mobile app that revolutionizes theatre rehearsal. Import your script, choose a role, and rehearse with an AI partner using natural voices — anywhere, anytime.

Available on Android · iOS coming soon

11
Languages
8+
HD voices / lang
3
Modes
100%
Offline STT
0
Account needed
16K+
Lines of code
Everything you need to master your craft
From script import to performance analysis, every tool an actor needs in one app.
🎭

Smart rehearsal

Import any script (copy-paste, file, PDF, photo OCR). The AI detects characters automatically — you choose your role. Your AI partner delivers lines with natural HD voices.

🎤

Offline speech recognition

Two embedded STT engines (Sherpa-ONNX streaming + Vosk). Works without internet. Word-by-word accuracy scoring. Real-time analysis of your diction, missed lines, and hesitations.

🎬

AI stage direction

An AI director (Google Gemini) analyzes your scene and gives you personalized acting notes: intentions, emotions, rhythm, blocking, subtext. Professional coaching accessible to all.

🎙

Diction exercises

AI-generated tongue twisters in your language. 10 sound categories. Progressive difficulty. Timer with countdown. Real-time articulation scoring via grammar-based speech recognition.

💬

Improv & memorization

Free improv mode with AI paraphrasing of partner lines — forces active listening. Smart prompter that whispers first words after a silence. 3 progressive memorization levels.

📄

Universal import

Copy-paste, text file, PDF, or OCR from script photo (up to 6 pages). AI-powered automatic formatting cleanup. Smart detection of characters and dialogue lines.

No account required
Works offline
100% local data
Backup / Restore
GDPR compliant
No ads
Three modes, one complete ecosystem
Each mode is designed for a specific purpose. Together, they cover the entire performer's journey: from technical training to interview simulation.
Mode 1 · Theatre

Rehearse your scenes with an AI partner

The heart of the app. Import your script, choose your role from the detected characters, and start rehearsing. The AI delivers lines with natural HD voices. Three rehearsal modes: Fluid (continuous), Step-by-step (line by line), and Run-through (full scene without stopping).

HD Cloud voices (WaveNet + Gemini TTS)
Offline speech recognition (Sherpa + Vosk)
Real-time word-by-word accuracy scoring
AI stage direction (scene analysis)
Smart prompter (after silence)
Diction exercises (10 categories)
Improvisation with AI paraphrasing
3 progressive memorization levels
Adjustable speed (0.5x to 2x)
Personal annotations on lines
Scene history and favorites
Loop mode (repeat a passage in loop)
Free (basic) Pro (full) Premium (full)
Mode 2 · Create your scene

Generate original scenes with AI

Create custom scenes with generative AI. Choose the genre, characters, and duration. Ideal for acting classes, workshops, auditions, or just for fun. Generated scenes are instantly playable in Theatre mode.

Scene generation (5 to 45 min)
Genre selection (comedy, drama, thriller...)
Configurable characters (2 to 6)
Full multi-act shows (Premium)
Educational scenes for classes (Premium)
Library of saved scenes
Rewrite individual lines
Variations and sequels of a scene
Random role assignment
Professional PDF export
Pro Premium (all)
Mode 3 · Job interview

Simulate an interview with an AI recruiter

Prepare for job interviews with a complete AI simulator. Timed simulations (10-30 min), tricky questions by category (15 types), pitch analysis, CV scan, cover letter generation, and detailed AI recruiter assessment.

10/20/30 min simulations (with or without CV)
15 categories of tricky questions
60-second pitch analysis
CV scan and analysis
Cover letter generation
Complete AI recruiter assessment
Premium exclusive
See it in action
Real screenshots from the app.
Hub
Hub
Import
Import
Scene
Scene
Create
Create
Show
Show
Stats
Stats
Cutting-edge technology
Hybrid cloud/on-device architecture for optimal performance. Each component is chosen to deliver the best experience possible, online and offline.

Artificial intelligence

Google Gemini 2.5 Flash-Lite via secure PHP proxy. ~20 specialized endpoints for scene generation, stage direction, performance analysis, diction exercises, and more.

Prompts in English, multilingual output. Strict anti-language-mixing instructions.

Text-to-Speech (voices)

3 voice tiers by plan: system voices (free), Google WaveNet HD (Pro), Google Gemini TTS ultra-natural (Premium). 8+ distinct voices per language. Automatic fallback.

OGG_OPUS format, smart local cache, sliding 30-day window anti-abuse fuse.

Speech-to-Text (listening)

Dual embedded STT engine, 100% offline. Sherpa-ONNX streaming (priority, ~0.9s latency) for 5 languages + Vosk with grammar for 5 additional languages. No voice data sent to the cloud.

Models downloaded once. Sherpa: zipformer2 kroko. Vosk: grammar mode = constrained vocabulary for maximum accuracy.

Scoring & analysis

Real-time word-by-word comparison between expected text and what you say. Diff highlighting of errors, omissions, additions. Detailed inline post-line analysis. Progress history.

Memorization badges, performance tracking, personalized AI coaching.

Import & OCR

Multi-source import: copy-paste, text file, native PDF, or OCR from photo (up to 6 pages). AI-powered automatic formatting cleanup. Character detection via heuristics + AI.

OCR via Gemini Vision. Cleanup: reformats to NAME: line. Smart format free, OCR Pro+.

Security & privacy

No account required. All data stored locally on device (localStorage + IndexedDB). Backup/restore via .mtbackup file. No tracking, no ads. GDPR compliant.

License via unique key (device-bound). Max 3 devices. Server secrets stored outside document root.
11 fully supported languages

Translated interface (1,200+ i18n keys), HD voices, speech recognition, AI prompts, and help pages in every language.

🇫🇷 French
🇬🇧 English (UK)
🇺🇸 English (US)
🇪🇸 Spanish
🇩🇪 German
🇵🇹 Portuguese
🇮🇹 Italian
🇳🇱 Dutch
🇵🇱 Polish
🇷🇺 Russian
🇹🇷 Turkish

STT Sherpa (streaming, <1s): FR, EN, ES, DE, RU · STT Vosk (grammar): PT, IT, NL, PL, TR

Client
Capacitor 8 + Vite
50 JS modules, ~16K lines
Server
PHP + Nginx
KVM2 VPS 8GB, ~20 endpoints
Native
Kotlin Plugins
Sherpa, Vosk, Share, FileSaver...
AI
Google Gemini
2.5 Flash-Lite, PHP proxy
A plan for every ambition
Start for free, upgrade as you grow. Daily rechargeable energy system — no surprise bills.

Free

$0
forever
 
  • Theatre mode (basic)
  • System voices
  • Offline speech recognition
  • Accuracy scoring
  • Import text, file, PDF
  • AI cleanup (3/day)
  • 3 favorites, 3 history slots
  • HD Cloud voices
  • AI direction, diction, improv
  • Create your scene mode
  • Interview mode

Premium

$9.99/mo
 
200 ⚡/day · cap 6,000 ⚡
  • Everything in Pro +
  • Gemini TTS ultra-natural voices
  • Full Interview mode
  • 10/20/30 min simulations
  • Tricky questions (15 categories)
  • CV scan + cover letter
  • AI recruiter assessment
  • Create your scene (6 chars, 45min)
  • Full shows + educational scenes
  • Variations, sequels, projects
  • Extended quotas on everything
  • Unlimited history
How it works
1

Import

Text, file, PDF, or photo

2

Choose

Your role and settings

3

Rehearse

The AI delivers the lines

4

Improve

Scoring, coaching, history

Ready to take the stage?

Download Mastering Theatre for free and start rehearsing with your AI partner today.

www.masteringtheatre.com