
OneLine – Daily Diary
One Line a Day Journal
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Free
In-App Purchases
About
One line. Every day. Your story.
OneLine is the beautifully simple journal that helps you capture each day in a single sentence. No pressure, no long-form writing, just one meaningful line that captures your moment.
DAILY JOURNALING, SIMPLIFIED
- Write one line per day (up to 280 characters)
- Track your mood with five expressive moods
- Attach photos to preserve visual memories
- Daily writing prompts to spark inspiration
MISSED A DAY? WRITE IT ANYWAY
- Open any past day and fill it in later
- A day you forgot is never locked away
- Filling a gap puts your streak back together
- Free, because writing in your own diary should be
TRACK YOUR JOURNEY
- Build writing streaks and stay consistent
- See at a glance which days you journaled
- Tap any day to open it right from your stats
- See mood trends and patterns over time
- On This Day: rediscover entries from past years
YEAR IN REVIEW
- Beautiful, interactive annual summary
- Mood charts, writing activity graphs, and more
- Tap any chart for detailed insights
- Share your Year in Review as an image
YOUR DATA, YOUR PRIVACY
- Entries stay on your device and sync privately
- Export your journal anytime as PDF or text
- No ads, no tracking, no data collection
- Lock your journal with biometric authentication (Premium)
PREMIUM (One-time purchase, yours forever)
- Photo memories on every entry
- Biometric app lock
- Streak shield: covers one forgotten day a month
- Support independent development
Everything else stays free: unlimited entries, filling in days you missed, search, export, activity map, Year in Review, On This Day, mood tracking, stats and cloud sync.
Start your one-line-a-day habit today. It takes 30 seconds, but the memories last forever.
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Privacy Policy & Terms of Use:
https://merzkevin.de/privacy-OneLine.html
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What's New in OneLine
1.5
August 19, 2026
A fix for VoiceOver in the activity map: each day now opens the day it announces. It used to name one date and open the one a week later. If you missed version 1.4, that is the one to look for: you can open any past day and write it in, choosing a photo from your library works again, and a calendar bug that hid the first days of some months is fixed.
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In-App Purchases
$2.99
Premium
Unlimited entries, themes, stats, export





