Lanternly

About the project

Lanternly is a diary with a small light inside: Luna, a kitten with a lantern, greets you every day, asks one quiet question and helps you notice what is happening in your life. The project's motto is "a small light for every day".

Technically it is the studio's most ambitious app: a single SwiftUI codebase for iPhone, iPad, Mac and Apple Watch, intelligence that runs entirely on the device and not a single third-party dependency — zero external SDKs, zero analytics, zero tracking.

Three paths

On first launch you choose what you want a diary for — and Lanternly assembles the interface around you. Paths can be combined.

Feelings

Moods with nuance, a balance wheel, gratitude, breathing pauses, a letter to yourself with scheduled delivery and the "see it differently" practice — a gentle way to unpack a difficult situation.

Growth

Habits built around rhythm instead of rigid chains, goals with steps and check-ins, a "step for today" and weekly reviews. Habits like daily walks can be verified with HealthKit data — read-only, with your explicit permission.

Business

A decision journal with weighted analysis, pre-mortems and post-mortems, hypotheses, money and net-worth tracking, calculators. An entrepreneur's diary that helps you think, not just record.

Key features

Luna — an on-device companion

Luna talks with you through Apple Foundation Models — a language model running right on your iPhone and Mac. She has three layers of memory, including an editable "Memory of you": you can always see and change what Luna has remembered about you. Russian works through a bridge to Apple's system translator — also entirely on the device. In hard moments Luna does not pretend to be a specialist: the app gently offers contacts for professional help.

A diary without friction

An editor with autosave — there simply is no Save button. Mood, tags, favorites, photos and voice notes with on-device transcription. A "Today" screen with a question of the day and a "Year ago" section.

Journals

Diary, gratitude and dreams out of the box, plus custom journals for any topic. Instead of irreversible deletion there is an archive: entries are never lost by accident.

A book from your diary

Your entries can be bound into a real book: PDF or EPUB 3 with a cover builder, live preview and embedded fonts. Generation works without external libraries — the layout engine is written in pure Swift.

Your data is portable

Full export to Markdown and JSON along with media, Day One import with dates, photos, weather and tags. No lock-in on your data.

Apple ecosystem

Apple Watch

A full app: mood, gratitude, breathing and the "step for today" right from your wrist, plus watch-face complications. Sync with iPhone is resilient to being offline.

Widgets

Interactive home-screen widgets: mood and quick entries in one tap — via App Intents, without opening the app.

Mac

Not a port but a real desktop app: a separate settings window, menu commands and a menu bar item for instant notes.

iMessage stickers

18 Luna stickers for your conversations.

Technical highlights

Intelligence on the device

Foundation Models, the system translator, speech recognition and language detection all run locally. The app has no server of its own, and your entries never leave the device for the sake of "smart" features.

SwiftData + CloudKit with zero login

The local SwiftData store is mirrored into the user's personal iCloud database. No registration: the app works immediately, and sync between iPhone, iPad, Mac and Apple Watch appears automatically for iCloud users.

Zero dependencies

The project has not a single third-party package — only Apple system frameworks. Fewer attack surfaces, fewer privacy risks, predictable updates. The project is generated with Tuist, covered by hundreds of Swift Testing tests and written in Swift 6 with strict concurrency checking.

Design and accessibility

A warm, lamplit aesthetic: the Lora serif for headings, Inter for body text, four free themes and six premium ones — from "Night" to "Lavender". Full Dynamic Type support, including the largest accessibility sizes.

Privacy

Privacy is not a settings toggle but the architecture:

• All entries are stored on the device and, optionally, in your personal iCloud
• No analytics, no trackers, no third-party SDKs — they simply do not exist in the code
• Conversations with Luna and voice transcription never leave the device
• App lock with Face ID / Touch ID and a privacy screen in the app switcher
• End-to-end iCloud encryption with Advanced Data Protection enabled; otherwise iCloud data is encrypted by Apple with its own keys

Monetization

The core diary and conversations with Luna are free and will stay free. The Lanternly+ subscription unlocks unlimited journals and goals, the PDF and EPUB book, premium themes, Luna's outfits and iMessage stickers.

Development status

The app is in active development: the core functionality is in place for iPhone, iPad, Mac and Apple Watch, and preparation for TestFlight and the App Store release is underway.