Privacy, on-device AI, the Digital Twin, the constellation, the Dynamic Island, your data, your phone, your peace of mind. The honest version of every answer.
DailyVox is a voice journal for iPhone and iPad. You speak your thoughts and DailyVox transcribes them on-device using Apple's Speech framework. It also uses on-device AI to detect your mood, build a Digital Twin of your personality, and visualise your entries as a private constellation in your inner sky — all without sending any data to the cloud.
No. DailyVox requires no account, no sign-up, and no email address. You download it and start journaling immediately. If you want to sync across devices, you can optionally enable iCloud sync, which uses your existing Apple ID — but this is entirely optional.
DailyVox runs on iPhone and iPad with iOS 17.0 or later. It is optimised for both devices with a native interface that adapts to different screen sizes. The Dynamic Island recording timer requires an iPhone 14 Pro or newer. On other iPhones running iOS 16.1+, the same Live Activities appear as Lock Screen banners. No Android, web, or Mac version yet — macOS and Apple Watch are on the v1.5 roadmap.
Yes. While voice journaling is the primary mode, you can type entries directly, or record voice and then edit the transcription. The AI features work on the text regardless of whether it was typed or spoken.
Yes. DailyVox processes everything on your device. There are no servers receiving your data. Your voice recordings, transcriptions, photos, and Digital Twin model never leave your phone. Apple has verified this with a "Data Not Collected" privacy nutrition label on the App Store. See our Privacy Policy for the full details.
Yes. Recording, transcription, mood detection, and all AI features work fully offline. The app uses on-device models that run on Apple's Neural Engine, so no internet connection is needed at any point. You can verify this yourself in airplane mode.
Yes. DailyVox was designed specifically for private journaling. Your data never leaves your device, encrypted backups use AES-256-GCM, and you can lock the app with Face ID or Touch ID. Since there are no servers, there is no risk of a data breach exposing your journal.
If you have iCloud sync enabled, your entries will be available on any other Apple device signed into the same Apple ID. If you have exported encrypted backups, you can restore from those. Without either, your journal data exists only on the device — so we recommend enabling iCloud sync or regularly exporting encrypted backups.
Yes. DailyVox supports exporting your journal in multiple formats: PDF, JSON, Markdown, CSV, and plain text. You can also create password-protected encrypted backups using AES-256-GCM. Go to Settings → Export Data to choose your format.
Yes. You can enable iCloud sync in Settings to sync your journal entries across your iPhone and iPad via Apple's CloudKit. Your data is encrypted with your Apple ID. iCloud sync is optional and disabled by default — DailyVox works perfectly without it.
Your Digital Twin is a private AI model that learns from your journal entries over time. It picks up on your personality traits, emotional patterns, communication style, values, and personal knowledge. After enough entries, it generates personality cards and can predict your moods. The Twin stays 100% on your device and grows more accurate the more you journal.
DailyVox uses Apple's NaturalLanguage framework to analyse the sentiment and emotional content of your journal entries on-device. It classifies entries into 9 mood categories and tracks patterns over time. The mood detection runs automatically after each entry — you can manually adjust it if you disagree.
DailyVox uses Apple's built-in machine learning frameworks: NaturalLanguage for sentiment and named entity recognition, Speech for transcription, and Core ML for running models on Apple's Neural Engine chip. These frameworks are optimised to run efficiently on-device without needing an internet connection. See our Technology page for the full architecture.
DailyVox tracks 9 moods: happy, calm, grateful, excited, tired, anxious, sad, angry, and no-mood (when the AI can't confidently classify). The AI automatically detects your mood from each journal entry, and you can view mood trends over time through weekly insights.
Personality cards are insights generated by your Digital Twin after it has analysed enough journal entries. They describe aspects of your personality, values, communication style, and emotional patterns that the AI has identified. Cards become more detailed and accurate as you journal more frequently — usually meaningful after 15–20 entries, rich after 80–100.
Every journal entry in DailyVox becomes a star in your private constellation. Stars are coloured by mood (warm gold for positive, sage for calm, cool blue for reflective, soft coral for stressed) and connected by faint lines when entries share themes. Over months of journaling, clusters and nebulae form around the parts of your life that show up most. The constellation exists only on your iPhone — no one else can see it. Read the full story on our constellation update post.
When you tap the mic, the Dynamic Island shows a live recording timer — your seconds tick by, your waveform moves with your voice. The timer counts up past 42 seconds (the suggested target) so you can speak as long as you need. After your entry saves, a brief "a new star appeared in your sky" Live Activity celebrates the entry. Requires iPhone 14 Pro or newer; on other iPhones the activity appears as a Lock Screen banner. There's also an opt-in streak Live Activity (Settings → Live Activities) and a new Constellation Lock Screen widget.
The main differences are privacy and AI architecture. DailyVox processes all data on-device with no cloud servers, while Day One syncs your data through their servers. DailyVox includes AI features like a Digital Twin, constellation visualisation, Dynamic Island Live Activities, and on-device mood prediction that Day One does not offer. Day One supports more platforms (Mac, Android, web) and has a longer track record — so if cross-platform sync matters more than on-device privacy to you, that's a real consideration.
A voice journal that lives on your iPhone. Every entry becomes a star in your inner sky. No accounts. No servers. No cloud.