OneLine vs シンプル3行日記
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OneLine
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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: https://merzkevin.de/privacy-OneLine.html
シンプル3行日記
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シンプル3行日記は、1日3行だけ書く、続けやすい日記アプリです。 ■ 特長 ・今日の出来事を3行だけ記録 ・連続日数(ストリーク)と最長記録を表示 ・過去の記録を日付つきで振り返り ・日本語/英語の切り替え、ダークモードに対応 ・広告付きで完全無料 三日坊主になりがちな人でも続けやすい、ゆるい日記習慣を。
Screenshots
Verdict
The clearest difference is in-app purchases: シンプル3行日記 at none against OneLine's 1. シンプル3行日記 also leads on update cadence (every 3 days vs every 10 days). OneLine's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. OneLine sells 1 one-off in-app purchase. シンプル3行日記 asks for nothing beyond the download.
OneLine ships an update every 10 days, シンプル3行日記 every 3 days. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.
| Parameter | OneLine | シンプル3行日記 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Kevin Merz | Searial, Inc. |
In-app purchases
OneLine
- Premium$2.99
シンプル3行日記
No in-app purchases









