Positive Journal 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.
Positive Journal
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Layer Diary is a journaling app designed to make the "3-Line Positive Journal" a daily digital habit. Writing three positive lines each night builds resilience — the ability to bounce back from stress, setbacks, and hard days with greater ease. The rule is simple. Before bed, write down three good things that happened today. Your brain encodes memories most powerfully in the 15 minutes before sleep. Fill that window with something good, and your mind consolidates the whole day as a positive one. No negatives. No pressure. Small things count — "The weather was beautiful" or "My evening walk felt great" is enough. Keep it up, and gratitude stops feeling like a practice. It starts feeling like you. Your past, quietly layering beneath you Every entry adds a new layer. Tap any date and look back at the same day last year, the same day last month, the same weekday last week — all stacked and scrollable. You'll see, in one glance, how far you've come. A built-in daily reminder helps you make this a non-negotiable part of your night routine. Your thoughts, protected Face ID lock. Automatic iCloud sync. Plain text export. Your words, guarded quietly — always there when you need them. Three lines tonight. A better you, eventually.
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 ads: Positive Journal at none against シンプル3行日記's shown. シンプル3行日記's advantage is iOS requirement (17.0 vs 26.2). On price, update cadence, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Positive Journal ships an update every 4 days, シンプル3行日記 every 3 days. The most recent releases landed on September 20, 2026 and September 16, 2026 respectively.
| Parameter | Positive Journal | シンプル3行日記 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 26.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | PIN STUDIO | Searial, Inc. |
In-app purchases
Positive Journal
No in-app purchases
シンプル3行日記
No in-app purchases





