Comparison

3sec Diary vs 観察日記

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

3sec Diary

Quickly log daily activities and feelings in just three seconds. Your entries are securely stored in your iPhone Calendar, ensuring data safety and easy access. This tool helps you preserve memories and makes research and sharing effortless.

Highlights
  • 3-second daily logging
  • Calendar integration
  • Secure data storage
  • Easy research and sharing
  • Memory preservation
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This "3sec Diary” is not just a diary. You can input what you did, how you feel in this tool.It will take only 3 seconds!Your time will be saved. And you can leave it on your calendar on iPhone as long as you want. "3sec Diary “ data is not recorded on App on your iPhone.The data is recorded to your iPhone Calendar.You never miss your data when something wrong with this App. Researching ,synchronizing,sharing are so easy. This “3sec Diary” is not just a diary, but your memories.

About

観察日記

Features
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■写真を撮って植物の観察日記をつけましょう! ■撮影した写真が自動的にコマ送り動画になります! ■コマ送り動画を見て成長過程を楽しみましょう! 〜機能一覧〜 ==日記の機能== ◆撮影した写真にコメントをつけることができます(編集可)  日々の変化を記録しましょう! ◆撮影した画像をご自身の端末のカメラロールに保存できます  撮影しただけでは端末に保存されないのでご注意ください! ◆複数の植物の記録をつけることができます  いろいろな植物の変化を記録しましょう! ==カメラの機能== ◆撮影時にカメラの背景にうっすら前回撮影した写真が写ります  前回の撮影と同じ角度から撮影して変化を比較しましょう! ◆背景に写る前回の画像の透明度を変えることができます  前回の写真が撮影の邪魔になるときは透明度を変えてみましょう! ◆グリッド線の表示・非表示  グリッド線を利用してバランスのとれた写真が撮影できます ==動画の機能== ◆写真が3枚以上になると自動的にコマ送り動画が作成されます ◆作成された動画をご自身の端末に保存することができます ◆作成された動画をTwitterに投稿することができます ◆再生スピードを調整できます 〜その他〜 使い方次第では植物に限らず、コマ送り動画の作成を利用して様々なものの変化を記録していくこともできます

Screenshots

3sec Diary4 screens
観察日記4 screens

Verdict

The call

The clearest difference is in-app purchases: 観察日記 at none against 3sec Diary's 1. 観察日記 also leads on ads (none vs shown) and update cadence (weekly vs every 26 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 3sec Diary sells 1 one-off in-app purchase. 観察日記 asks for nothing beyond the download.

UpkeepUpdate frequency

3sec Diary ships an update every 26 months, 観察日記 weekly. The most recent releases landed on October 21, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 4 level
3sec Diary versus 観察日記: the parameters behind the verdict, then further details
Parameter3sec Diary観察日記
PriceFreeFree
Positive reviews60.0% of reviews—
Update frequencyEvery 26 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.09.0 — better
Further details — not scored
Size12 MB53 MB
Age rating4+4+
DeveloperKENJI KANEMOTOYutaka Tajika

In-app purchases

1 purchases

3sec Diary

One-time1
  • Eliminate Ads$0.99
None

観察日記

No in-app purchases

Questions

Is 3sec Diary free?
3sec Diary is free to download, with in-app purchases available.
Is 観察日記 free?
観察日記 is free to download, with no in-app purchases.
Do 3sec Diary or 観察日記 have ads?
3sec Diary shows ads; 観察日記 does not.
Which is updated more often, 3sec Diary or 観察日記?
3sec Diary ships an update every 26 months, and 観察日記 weekly. Most recently, 3sec Diary was updated on October 21, 2026 and 観察日記 on October 26, 2026.

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