---
title: "OneLine – Daily Diary - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 captu"
---

# OneLine – Daily Diary — United States
> One Line a Day Journal

![OneLine App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/c9/23/65/c9236534-2eff-6251-daf9-32d44dad11d5/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Kevin Merz](https://apptail.io/developer/kevin-merz-VCgc) (Germany)
**Category:** Lifestyle
**Rating:** 5.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** de.merzkevin.oneline
**Store:** Apple App Store
**Country:** United States
**Version:** 1.5 (released 2026-08-19)
**Original Release:** 2026-03-29
**Languages:** English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Chinese, Spanish

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6760251447)
**AppTail Page:** [https://apptail.io/app/oneline-daily-diary-tIjA/united-states](https://apptail.io/app/oneline-daily-diary-tIjA/united-states)

## OneLine Description
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.

---
Privacy Policy & Terms of Use:


## OneLine Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/11/94/45/119445d9-5af2-895e-2d1e-7855acb7e135/iPhone-65-01.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c8/3d/09/c83d0961-09d3-fbe9-b65f-74bc84056794/iPhone-65-02.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/6d/64/6d/6d646de6-c0ce-0732-54f9-fb21c5255178/iPhone-65-03.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9f/52/8c/9f528cdb-2bd2-bdee-d335-529e302025b8/iPhone-65-04.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/b2/99/cc/b299cc42-a9b8-51f0-2f49-d4087b087028/iPhone-65-05.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/2a/54/c2/2a54c2e0-8c0e-b1e5-ba68-8ac717649fd5/iPhone-65-06.png/1284x2778.png)

## OneLine Rating Breakdown in United States
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)


## OneLine In-App Purchases
| Item | Price |
|------|-------|
| Premium | $2.99 |



## Apps Similar to OneLine
- [Pick 4 Me: Random Decision](https://apptail.io/app/pick-4-me-random-decision-Geqe/united-states)
- [Dream Journal - Daily Journal](https://apptail.io/app/dream-journal-daily-journal-jRJu/united-states)
- [Dear me Diary -beautiful diary](https://apptail.io/app/dear-me-diary-beautiful-diary-WGLv/united-states)
- [Diary Journal with Lock](https://apptail.io/app/diary-journal-with-lock-rDiw/united-states)
- [mellog - 커플, 사진, 일기, 기념일](https://apptail.io/app/mellog-wRMy/united-states)
- [Minimal Diary - Simple Journal](https://apptail.io/app/minimal-diary-simple-journal-dFCz/united-states)
- [EveryDay - 다이어리, 일기, 메모](https://apptail.io/app/everyday-zfbA/united-states)

## OneLine Available In
- [United States](https://apptail.io/app/oneline-daily-diary-tIjA/united-states)
- [Bahrain](https://apptail.io/app/oneline-daily-diary-tIjA/bahrain)
- [Germany](https://apptail.io/app/oneline-daily-diary-tIjA/germany)
- [Ecuador](https://apptail.io/app/oneline-daily-diary-tIjA/ecuador)
- [Estonia](https://apptail.io/app/oneline-daily-diary-tIjA/estonia)
- [Australia](https://apptail.io/app/oneline-daily-diary-tIjA/australia)
- [South Korea](https://apptail.io/app/oneline-daily-diary-tIjA/south-korea)
- [Kuwait](https://apptail.io/app/oneline-daily-diary-tIjA/kuwait)
- [Russia](https://apptail.io/app/oneline-daily-diary-tIjA/russia)
- [Japan](https://apptail.io/app/oneline-daily-diary-tIjA/japan)

---

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