How much is SpanishDrill — macOS Spanish speaking trainer?

SpanishDrill — macOS Spanish speaking trainer is listed for sale at $2,500 USD.

SpanishDrill — macOS Spanish speaking trainer - Sell Project

Listed August 18, 2026

About SpanishDrill — macOS Spanish speaking trainer

Pop-up cards you must say aloud; offline Whisper grades you. macOS, menu bar.

SpanishDrill is a finished, production-ready macOS app that makes you speak Spanish instead of tapping through flashcards. Every N minutes a card floats above every window, including other apps in full screen. You hold Space, say the phrase out loud, and a local Whisper model decides whether you got it right. The window does not go away until you do. Three steps per card: word, then phrase, then a full sentence. Everything runs on-device. No API keys, no servers, no per-user inference cost, no privacy story to explain to users. What is already built and working (v1.2.0, shipping .dmg) Speech recognition: whisper.cpp (large-v3-turbo q50) linked into Swift, Metal + Accelerate backends, push-to-talk capture through AVAudioEngine Fuzzy matcher tuned for learners, plus a 4-layer hallucination filter (Whisper's classic "thanks for watching" phantom output is handled) Content: 48 themed decks, 720 cards, 2,160 spoken units, built around real life in Spain (NIE, empadronamiento, Hacienda, alquiler, médico, DGT, autónomo and more). Every unit has Spanish, Russian and English text plus Cyrillic and English phonetic transcription Two TTS engines behind one protocol: Piper (neural, bundled) and AVSpeechSynthesizer Leitner-lite spaced repetition; failed cards come back sooner Menu-bar app (LSUIElement), interval and working-hours scheduler, auto-pause, login-item autostart Bilingual UI (Russian/English), switchable at runtime Custom app icon and a one-command .dmg build (160 MB). No Xcode required: pure SPM plus shell scripts swift-testing unit tests over a Foundation-only core module Monetization a buyer can pick up immediately The obvious next step is the Mac App Store as freemium: ship the app for free with a handful of decks unlocked, and sell the full 48-deck library as a one-time in-app purchase or a subscription. The deck format is one JSON file per theme, so gating content is a configuration change rather than a rewrite. Adding Portuguese, Italian or French is a content job, not an engineering one: the recognizer is already multilingual. To be precise about scope: the current build ships as an ad-hoc-signed .dmg. App Store distribution will require an Apple Developer account, sandbox entitlements and notarization. That is normal work, but it is not done yet. Honest status This was built as a personal tool. It has never been launched and never been marketed: 0 users, $0 revenue, no mailing list, no App Store presence. You are buying a finished codebase, a large hand-checked content library and a working build pipeline — not traction. What the buyer gets Full Swift source (41 files, clean Core / app split) All 48 decks plus the Python transcription script that generates the phonetic fields Build scripts: .app packaging, .dmg image, icon generation, test runner BRIEF.md — a long technical spec documenting every non-obvious decision (why Swift 5 language mode, why deployment target 14.0, why resources are copied by script, what breaks and how to fix it) Brand, app icon and RU/EN marketing screenshots Full exclusive transfer of rights 30 days of handover support Requirements: Apple Silicon Mac, macOS 14 or newer. The 547 MB Whisper model is downloaded on first launch rather than bundled, which keeps the installer small.

Project details

Next step: The shortest path to revenue:<ol><li data-list="bullet">Ship it on the Mac App Store as freemium — a few decks free, the full 48-deck library as a paid unlock. Add sandbox entitlements, notarization and StoreKit; the app logic itself needs no changes</li><li data-list="bullet">Localise the interface further. The UI already carries a full RU/EN string table and switches at runtime, so adding Spanish or German UI is a table, not a refactor</li><li data-list="bullet">Add target languages. The recognizer (Whisper) is multilingual and the deck format is language-agnostic — a Portuguese or Italian edition is a content project reusing the same engine</li><li data-list="bullet">Sell to a niche audience that actually exists: immigrants preparing for real bureaucratic conversations. The 48 themes are exactly those situations (NIE, empadronamiento, Hacienda, médico, DGT), which is content most flashcard apps do not have</li><li data-list="bullet">Port the core to iOS. The core module is Foundation-only by design and whisper.cpp already runs on iOS; the UI layer would be the new work</li><li data-list="bullet">Sell it as a white-label engine to language schools that want a branded speaking drill</li></ol> The BRIEF.md spec included in the sale is written for exactly this: it explains why every non-obvious choice was made, so a new owner is not reverse-engineering decisions before making changes.

For sale

Asking price: $2,500 USD

What's included

Source code, All related data, All related design work

Included in the sale: Full Swift source — Git repository with history, 41 source files, core logic split from the app target The complete content library: 48 themed JSON decks, 720 cards, 2,160 spoken units, with Spanish, Russian, English and phonetic transcription fields The Python transcription script that generates the phonetic fields, so new content can be produced the same way Build and release pipeline: .app packaging, .dmg image creation, icon generation, test runner — all shell scripts, no Xcode needed BRIEF.md, the full technical specification: architecture, every non-obvious build decision and its reason, known pitfalls and how to work around them Brand assets: the SpanishDrill name, app icon (source art, .icns, all sizes) and RU/EN marketing screenshots Full exclusive transfer of rights — after the sale I stop using and distributing the project 30 days of handover support: walking you through the build, answering questions about the code, help getting the first build running on your machine Not included: an Apple Developer account or code-signing certificate (the buyer needs their own for notarization and App Store distribution), the Whisper model weights and Piper voices (both are freely downloadable open-source artifacts that the app fetches or bundles from upstream), and any domain — the project has never had a website.

Reason for selling

I am busy with other things and no longer have time to maintain this project.

Project metrics

Average Monthly Revenue: Pre-revenue