OneLine – Daily Diary
One Line a Day Journal
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Missed a day? Open it and write it anyway. Your streak comes back with it.
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
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
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.
The developer, Kevin Merz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Kevin Merz
- Size
- 3.5 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium USD 2.99
- Copyright
- © Kevin Merz