DailyVox

Speak for 42 seconds. Watch your words become stars.

The free voice journal with on-device AI and a Digital Twin that learns who you are — entirely on your iPhone.

_{Free forever  ·  100% on-device  ·  ⭐️ 5-star rated  ·  500+ downloads, growing ~50% week-over-week  ·  🚀 live on Product Hunt}

 

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What is DailyVox?

DailyVox turns your spoken thoughts into a constellation of stars. Every journal entry becomes a point of light in your inner sky — mood-colored, connected by patterns only you can see.

Behind the scenes, an on-device Digital Twin learns how you think, how you feel, and who matters to you. It predicts your mood, answers questions about your patterns, and reveals meaning across months of entries. No accounts. No servers. No data collection.

Your thoughts never leave your device. Ever.

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App Screenshots

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Why DailyVox?

	DailyVox	Most Journal Apps
Price	Free forever	$35-50/year
AI processing	100% on-device	Cloud servers
Account required	No	Yes
Data collection	Zero	Analytics, text, usage
Works offline	Fully	Partial or none
Digital Twin	Yes	No
Voice-first	Yes (offline)	Text-first or cloud

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Core Features

Constellation Journal

Every entry becomes a mood-colored star. Gold for positive, sage for calm, blue for reflective, coral for stressed. Over time, your constellation reveals patterns — clusters around topics, connections between feelings, an inner sky that's uniquely yours.

Digital Twin AI

Four on-device AI models build a private mirror of your personality:

• Mind — communication style, vocabulary, reasoning
• Heart — emotional signature, sentiment arc, mood triggers
• Voice — speech patterns, pacing, tone
• Graph — people, places, topics, and how they connect

Ask your Twin questions. It answers from your history, running entirely on your iPhone's Neural Engine.

42-Second Voice Entries

Speak at 150 words/minute instead of typing at 40. No blank page anxiety. DailyVox transcribes on-device using Apple Speech — no internet required.

Mood Tracking & Predictions

Automatic sentiment analysis on every entry. Trends across days, weeks, and months. Your Twin predicts tomorrow's mood based on your patterns.

Privacy by Architecture

Zero network calls. Zero third-party SDKs. Zero analytics. Apple's strictest privacy label: "Data Not Collected." Your journal is encrypted on-device. Optional iCloud sync uses your personal account with Apple's end-to-end encryption.

Everything Else

• Biometric lock — Face ID / Touch ID
• Photo attachments — up to 5 per entry, stored locally
• Encrypted exports — PDF, JSON, Markdown, CSV, AES-256 backup
• Widgets — Home Screen & Lock Screen for streaks and quick recording
• Siri Shortcuts — "Hey Siri, open my journal"
• Journaling goals — weekly targets with milestone celebrations
• 4 themes — System, Ivory, Light, Dark

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Tech Stack

Layer	Technology
Language	Swift, SwiftUI
Data	Core Data + CloudKit (optional iCloud sync)
AI/NLP	Apple NaturalLanguage (NLTagger, NLEmbedding)
Speech	Apple Speech (SFSpeechRecognizer, on-device)
ML	Neural Engine via CoreML
Minimum	iOS 17.0+
Devices	iPhone, iPad (Universal)

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What's New: v1.6.0 — Semantic Memory & Measurable Fidelity

• Search by meaning — find an entry by what it was about, not the words it used; on-device NLEmbedding vectors, with a measured abstention threshold so search declines rather than guesses
• A first learned trait with honest confidence — the openness estimate comes from a small on-device model validated on consented human writing; every Twin prediction now shows how sure it is (tentative / moderate / strong)
• Your Day (Ambient), off by default — on-device photo scene labels and music mood as one-line notes through a review-and-discard queue; only derived labels, never the media
• Spoken Words — teach DailyVox names it mis-hears so corrections stick; sharper SpeechAnalyzer transcription on iOS 26
• iCloud sync off by default for new installs — entries live on this iPhone unless you turn sync on (existing syncers keep syncing)
• v1.5.0 (Body Twin) shipped the day before: HealthKit snapshots beside each entry, activity context, the body whisper, and Body & Mood insights

Full changelog · Try the interactive demo

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Roadmap

Version	Focus	Status
v1.0	Core voice journal + Digital Twin	Shipped
v1.1	Twin Predictions + Shareable Cards	Shipped
v1.2	Ask Your Twin (chat)	Shipped
v1.3	Constellation Update	Shipped
v1.3.5	Dynamic Island + New Icon	Shipped
v1.4.0	Warm redesign — Digital Twin moved to center	Shipped
v1.4.1	Voice-first "Speak your first star" onboarding	Shipped
v1.5	Body Twin — HealthKit snapshots, body whisper, review queue	Shipped
v1.5.5	Ambient Signals — on-device photo + music context	Shipped (in v1.6.0)
v1.6	Semantic Memory & Measurable Fidelity	Shipped
v1.7	Foundation Models Twin — grounded on-device chat with citations	Built · next release
v1.8	Multi-Language (Tamil, Kannada, Hindi, Spanish, Japanese, German first)	Planned
v2.0	Apple Intelligence Native (Siri AI, iOS 27)	Planned

Beyond v2.0: Personality Depth, Agentic Twin, Ambient Twin, the open Twin Protocol, and the DailyVox Mirror device. iPhone-only by conviction — the phone is the Twin's body, and every feature works end-to-end on the phone alone (no Mac or second computer, ever); portability lives in the data (Twin Protocol), not in platform ports — full roadmap

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FAQ

Is DailyVox really free?

Yes. No subscriptions, no in-app purchases, no ads. MIT licensed. Free forever.

Does it work without internet?

Yes. Every feature — voice transcription, AI analysis, Digital Twin — works fully offline.

Where is my data stored?

On your device in an encrypted Core Data store. Optional iCloud sync goes through your personal iCloud account (end-to-end encrypted by Apple). DailyVox never has access.

What is the Digital Twin?

An on-device AI model that learns your personality, communication style, emotional patterns, and life themes from your journal entries. It runs entirely on your iPhone's Neural Engine. You can chat with it, ask about your patterns, and get mood predictions.

Does DailyVox collect analytics or telemetry?

No. Zero data collection of any kind. No analytics SDKs, no crash reporting services, no telemetry. Verified by Apple's privacy label.

Can I export my journal?

Yes. PDF, JSON, Markdown, CSV, or AES-256 encrypted backup.

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Why I Built This

I've written a diary every day for 20 years. The problem was always the same — by the time I sat down to type, half the details were gone. Voice changes that. You speak at 150 words a minute without filtering yourself.

But every voice diary app I tried wanted to upload my recordings to their servers. That was a deal-breaker. So I built DailyVox — a voice journal where everything runs on-device, and the AI that knows you best is the one that never shares you with anyone.

The constellation metaphor came from staring at my own journal entries — hundreds of days, each one a tiny light. Together they form patterns. DailyVox makes those patterns visible.

— Karthikeyan NG

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Contributing & Support

DailyVox is open source (MIT) and built solo, in the open. If the mission — a personal AI that's private by construction — resonates, here's how to help:

• ⭐ Star this repo — the simplest way to help others find it
• 🚀 Upvote on Product Hunt — we just launched
• 🛠️ Contribute — issues and PRs welcome. Start with CONTRIBUTING.md and ARCHITECTURE.md
• 🗣️ Try it and tell me what's missing — download free or explore the interactive demo

It's a genuinely fun codebase to hack on: 100% on-device AI, SwiftUI, a Canvas-rendered constellation, and a Digital Twin engine — no backend to spin up, no API keys, just clone and run.

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Links

App Store	Download DailyVox Free
Website	getdailyvox.com
Blog	getdailyvox.com/blog
Privacy Policy	getdailyvox.com/privacy
Press Kit	getdailyvox.com/press
Contact	intrepidkarthi@gmail.com

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DailyVox is and will always be free. No subscriptions, no in-app purchases, no ads.
Download it today.