A diary with a lock that stays on this device
A private journal with a lock and a PIN only you know. Entries, photos, voice notes and videos are encrypted here. No account, no server, no cloud: the diary has no network client of its own, so it has nowhere to send your text.
Coming soonGoogle PlayComing soon to Google Play. iOS 16+ · Android 10+
Our ideas, like pictures, are made out of lights and shadows.
on a plane, in the woods, anywhere
What is not here is part of the diary too
Privacy here is not a setting you might forget to turn on. It comes from how the app is built.
No account
No sign-up, no email, no cloud password.
No server
The app keeps your diary on the phone, not in anyone’s database.
No cloud
The diary has no network client of its own, and the Android build does not even ask for internet access.
No ads or tracking
No analytics and no third-party data SDKs.
On the phone
The diary, screen by screen
A timeline that goes back day by day, an entry that holds text, a photo, a voice note and a stamp at once, and a calendar that shows the month you had. All of it on the device, with no cloud and no account.
- Timeline — today, yesterday and back, with the mood of the day and your tags.
- An entry — text, a photo, a voice note with its waveform, a sticker on the page.
- Calendar — a month at a time, with the mood of each day you wrote on.
Search the diary
Today
Yesterday
Friday, 26 September
Morning before the rainThe fog over the field had not lifted yet, so I took the long path and got there late anyway.Nothing to decide today. Good.
September
Mood of the day
Inside
Everything to write the day down. Nothing to keep score of it.
Text, photos and voice in one entry
In any combination. Every edit is kept as a new version, so earlier text is not lost.
On this day
Your entries from this date in earlier years.
Oracle
A random answer and a minute to hear yourself think. Off until you turn it on.
All features
Everything the diary can do
Twelve areas — and each feature works on the phone, with no account and no cloud.
Horizonpart of TAEONIA Horizon. All of it is free for the first 14 days.
- WritingTitle, date and time, dividers · Bold, italic, underline, strikethrough · 14 text colors and 5 highlight colors
- Photos, voice and videoHorizonTake or pick a photo, add a caption · Full-screen viewing with zoom · Voice notes with a waveform
- Drawing, stickers and backgroundsHorizonPencil or marker, eraser, three line widths · Free sticker sets: Crayons and Keks · Paid sticker collections: Pastel and Charcoal
- Mood and tagsMood of the day, from “very bad” to “great” · Moods shown in the calendar · Tags with their own colors
- Timeline, calendar, searchA timeline by day: today, yesterday and back · A calendar you swipe through month by month · A gallery of every photo in the diary
- MemoriesHorizonOn this day — entries from this date in earlier years · Noticed — topics you keep returning to · Hide a topic or turn it into a tag
- Plans and remindersHorizonTasks and events for the day in the calendar · A plan made from selected text in an entry · Mark a plan done — and bring it back if needed
- Prompts and templatesHorizonPrompts for where to start · Built-in templates · Your own templates: title, text and lists
- ProtectionHorizonA PIN that takes part in the encryption · Quick unlock with Face ID, Touch ID or fingerprint · A pause after several wrong attempts
- Backups and movingHorizonA backup of the whole diary, encrypted with a recovery code · Automatic backups to a folder you choose — from daily to monthly · Keep one, three or five latest backups — each one verified
- Export and importHorizonExport to Markdown and Word (.docx) · The whole diary, a year, a month or your own range, picked on a calendar · Markdown keeps the earlier versions of entries; Word holds the current text
- Look and languageHorizonTwo themes: the light Mist and the dark Caprica · A reading typeface of your choice · Five text sizes and four line spacings
Encryption
We cannot read your diary, because it never reaches us
Entries and attachments are encrypted on disk. The keys live in the device’s system key store and never leave it.
How the encryption works- 01
You choose a PIN
The app does not store your PIN and cannot recover it.
- 02
The key stays in the system key store
It never leaves the device, and without your PIN it does not open the diary.
- 03
The whole database is encrypted
Entries and attachments are stored on disk only in encrypted form.
No streaks, no badges, no score of how often you write.
A writing reminder comes only if you turn it on — and it does not count the days you missed.
Good to know
You make the copies — and only you
There is no server holding a copy. So the diary gives you the tools, and says plainly what cannot be recovered without them.
Backups and movingA file with the whole diary and earlier versions of entries, encrypted with a 25-character recovery code. The code is shown once.
With TAEONIA Horizon: daily, every three days, weekly or monthly — to a folder you choose. Keep one, three or five latest.
If the phone is lost and there is no backup, the diary cannot be restored. The PIN and the recovery code cannot be reset — not by you, not by us.
Guides
Before you trust a diary app
Famous diaries
People who wrote for themselves
Start with one line
Installing takes a minute. The first entry takes as long as you like.
Coming soonGoogle PlayComing soon to Google Play. iOS 16+ · Android 10+