Focused, calm apps designed for iPhone & Apple Watch.

Tools that do one thing well — no subscriptions, no ads, no account creation. Your data stays on your device.

KanaLearn — Learn Japanese Kana

Guided hiragana & katakana lessons with instant offline audio and daily streak

Master hiragana and katakana with audio-led lessons and objective, automatic feedback. No flashcard self-grading, no fluff — just 92 characters taught clearly with progress tracking.

Offline audio: built-in Japanese speech works anywhere without internet.
Daily streak & quiet reminders: customizable goals and calm, opt-in nudges.
100% free: no paywall, no ads, no tracking.

Overview Guides FAQ

Crescendo 4×4 — Norwegian HIIT

The Norwegian 4×4 protocol starting at 30 seconds with screen-locked voice cues

Build your VO₂ max with the research-backed Norwegian 4×4 protocol without hitting a wall. Crescendo starts you with 30-second intervals and guides your progression level by level.

Live Activities: Lock Screen & Dynamic Island countdowns (iOS 17+).
Voice guidance: screen-locked audio cues duck music seamlessly.
Personalized HR zones: max HR computed via Apple Health or custom input.
Apple Watch handoff: push sessions directly to native Watch Workouts.
4 languages: fully localized in English, Polish, German, and Spanish.

Overview Guides FAQ

Why Misty Logic?

Private by default

No analytics trackers, no account registration, and no cloud databases. Your data never leaves your device.

No subscriptions

We build software you own and enjoy, not recurring monthly bills or aggressive upsell popups.

Native performance

Built exclusively for iOS and watchOS to feel fast, responsive, and native to your devices.