Emberlock — Private Journal

Single Origin Studio

In-app purchases

About this app

Emberlock is a private journal that stays on your phone. Locked behind a PIN, passphrase, or fingerprint and encrypted on your device — so the things you write stay yours alone.

No account. No sign-up. No tracking. Emberlock works offline, and nothing you write is ever collected by us — we have no servers and hold no copy of your journal. It’s a quiet, safe place to think out loud.

LOCKED & PRIVATE
• Open with a PIN, passphrase, or your fingerprint
• Every entry is encrypted on your device with strong, modern cryptography
• Screenshots and screen-recording are blocked inside the app
• Auto-locks the moment you switch away, so a glance never becomes a leak
• By design, we never hold your key — we can’t read your journal, and neither can anyone without your code

OFFLINE BY DEFAULT
• No sign-up, no email, no account to hack
• Your journal lives on your phone — we never collect or read what you write
• Cloud backup is optional and stays off until you turn it on — and even then it’s encrypted on your phone first, so only your passphrase can open it

WRITE THE WAY YOU FEEL
• Tag each entry with a mood and watch patterns emerge over time
• A calm, distraction-free writing screen that gets out of your way
• Autosave, so a thought is never lost mid-sentence
• A Recently deleted folder keeps removed entries for 30 days, in case you change your mind

SEE YOUR YEAR
• A colorful mood heatmap turns your entries into a picture of your months
• Spot streaks, dips, and the shape of your days at a glance

FIND ANYTHING
• Fast search across everything you’ve written
• Filter by mood to revisit a feeling or a chapter

MAKE IT YOURS
• A collection of warm, hand-tuned themes — dark and light
• Gentle daily reminders to help journaling become a habit

EMBERLOCK PREMIUM
Unlock the complete package:
• Decoy vault — a second PIN opens a separate, ordinary-looking journal, so there’s never anything to explain
• Encrypted Google Drive backup + auto-sync — an end-to-end-encrypted copy saved to your own private Drive folder and updated as you write. It’s encrypted on your phone before it leaves, so neither we nor Google can read it — only your passphrase can
• The full mood heatmap — month view, statistics, and every year
• More moods to choose from, every theme, and a disguised app icon
Premium is available as a monthly or yearly subscription, or a one-time lifetime purchase.

BACK UP ON YOUR TERMS
• Save an encrypted backup file that only your passphrase can open
• Restore to a new phone whenever you choose — you stay in control

WHY EMBERLOCK
Most journaling apps live in the cloud. Emberlock is built the opposite way: private by default, offline by design, and encrypted so that only you — with your PIN, fingerprint, or passphrase — can ever open it. It’s a diary with a real lock, made for anyone who wants a truly private space to reflect, track moods, practice gratitude, or simply remember.

Whether you keep a daily diary, a gratitude journal, a mood tracker, or a secret notebook, Emberlock keeps it safe, simple, and completely yours.

Made by Single Origin Studio.

Private journal • Secret diary • Mood tracker • Offline notebook • Encrypted diary with lock

What’s new

Welcome to Emberlock — a private journal that stays on your phone.
• Encrypted on your device, locked behind your PIN — no account, no sign-up
• A decoy journal that opens with a second PIN (Premium)
• Mood heatmap, "On this day" memories and smart search
• Six themes, each with its own painted scene
• Encrypted backups you control, with optional Google Drive auto-sync (Premium)