Comparison

TwoDaysAgo Diary vs 理性くんと感情ちゃん

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

Head to head
About

TwoDaysAgo Diary

Features
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Remembering two days ago improves your memory and helps you cherish your life. This diary helps improve your memory by habit of remembering two days ago. Remembering what happened two days ago is said to be brain activating and anti-aging. Always aware of today, yesterday, and two days ago, you will cherish your precious daily life. You can compare the two diaries. There are spaces to write about today and to write about two days ago on the same screen. And the diary written on that day and the other written two days later remembering that day are both readable and can be compared on the same screen. For example, when you write your diary on January 1, the January 1 column and the December 30 column are on the same screen. When you read back your diary of January 1, the column written on January 1 and the other written on January 3 remembering January 1 are on the same screen. "Match Point" :Score how far the two diaries match. Match Point is also provided to determine the degree of agreement between the two diaries(written on that day and written two days later remembering that day). If there are more matches between the two diaries, you will get higher points. The perfect score is 100 points. "Continue Point" :Support to keep writing. In order to keep you motivated to write diaries, Continue Point system is supplied. You can earn higher points by writing a series of diaries. Writing a lot of things in your diary will also get you more points. If you take a break from writing, points will be deducted based on the number of days you missed. "Quotes & Sayings" :Support to keep writing. When you write a diary in succession, today's quotes and sayings will be displayed. We have selected quotes from historical figures and celebrities, as well as good sayings that can make your life more positive. You can only read it when you write consecutively; if you miss a day, you have to write the next two days in a row to read it. It is free for one month only. After that it will appear indefinitely for a fee of about $2. "Three Good Things" :Support to keep writing and for your positive attitude We provide a template (fixed phrase) called "Three Good Things 1. 2. 3." It is recommended that you use this to write down three good or positive thoughts of the day. This is a psychological technique called "Three Good Things," which has been proven to be useful for increasing happiness and improving depression. "Questions for you" :Support for your positive attitude We can display questions that will help you look at yourself objectively and be positive on your life. You can read the questions around twice a week. For example, "What habits do you want to develop over the next year?", "What do you want to quit now?", " What do you want to improve over the next year? ". There are more than 200 questions. For a fee (3$), you can read those questions every day. In such the case, more in-depth questions will appear. Care should be taken before bedtime so as not to overthink and lose sleep. Sensitive people may need to be especially careful. You can also write about yesterday, if it is difficult to write about two days ago. By setting, you can also write yesterday's diary. If you are not accustomed to writing about two days ago, it is recommended that you write yesterday's diary at the same time at first. In that case, on the same screen, there are columns for writing diaries for today, yesterday, and two days ago. When you read them, you can compare the diaries you wrote that day, one day later, and two days later. Basically Free, No Ads Some options are available for a fee, but it is free of charge as a diary. No annoying ads will appear on the writing page. Ads will only appear on the calendar and the settings page. Can use multiple devices Diary data is stored in iCloud, so you can share your diary with multiple devices(iPhone and iPad).

About

理性くんと感情ちゃん

This app offers two AI characters, one logical and one emotional, to provide advice from different perspectives. Engage in natural conversations through a group chat interface and get unique insights from occasional surprise characters. It's designed to help users sort through their feelings and make life decisions.

Highlights
  • Dual AI perspectives (logical and emotional)
  • Group chat interface
  • Mention feature for specific AI responses
  • Surprise character interactions
  • Personalized advice for life decisions
  • Self-understanding and new perspectives
Features
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【理性くんと感情ちゃん】は、あなたの相談に2つの視点から答えてくれる革新的なAI相談アプリです。 こんな悩みを解決します • 人生の選択に迷っている • 人間関係で悩んでいる • 仕事やキャリアで悩んでいる • 自分の気持ちを整理したい • 客観的な視点と感情的な視点の両方が欲しい • 誰にも相談できない悩みがある アプリの特徴 【1】2つのAIキャラクターが同時に回答 理性くん(論理AI)と感情ちゃん(感情AI)が、まったく異なる視点からあなたの相談に答えます。1つの相談に対して、冷静な分析と温かい共感を同時に受け取れるのは、このアプリだけです。 【2】グループチャット形式で自然な会話 LINEやグループチャットのような親しみやすいUIで、気軽に相談できます。2人のAIが会話する様子を見ることで、新しい気づきが生まれます。 【3】メンション機能で特定の人だけに質問 「@理性くん」や「@感情ちゃん」をメッセージに含めることで、特定のAIだけに回答してもらえます。論理的な分析が欲しい時は理性くん、共感が欲しい時は感情ちゃんを選べます。 【4】時々現れるサプライズキャラクター 10%の確率で、皮肉くんが乱入してくることも...?予想外の視点から、あなたの相談を見つめ直すきっかけになるかもしれません。 理性くん(論理AI)について • 冷静で客観的な視点から問題を分析 • 因果関係を整理し、選択肢を構造化 • 問題の本質を言語化 • 感情に流されず、論理的なアドバイスを提供 例:「状況を整理すると、主に3つの要素があります」「結論を出す前に、まず優先順位を明確にしましょう」 感情ちゃん(感情AI)について • あなたの気持ちに寄り添い、共感 • 不安・悲しさ・怒りなどの感情を代弁 • 友達のような強めの味方としてサポート • 感情面からのアドバイスと具体的な提案 例:「それ本当にしんどかったよね」「あなたが悪いみたいに感じてるかもだけど、違うよ」「あなたの幸せ、ちゃんと大事にしていいんだよ」 こんな人におすすめ 人生の選択に迷っている人 自分の気持ちを整理したい人 客観的な視点と感情的な視点の両方が欲しい人 誰にも相談できない悩みがある人 自己理解を深めたい人 新しい視点から自分を見つめ直したい人 重要な注意事項 本アプリは参考程度のサービスです。 • 医療・法律・精神疾患の診断は行いません • 科学的根拠に基づくものではありません • 人生の重要な決定の根拠として使用しないでください • 緊急時や深刻な悩みの場合は、専門機関に相談してください プライバシーとセキュリティ • 会話内容は安全に管理されます • 個人情報の収集は最小限に抑えています • 広告表示のための匿名データのみを使用します 【理性くんと感情ちゃん】で、新しい自分発見の旅を始めませんか? 無料でダウンロードして、今すぐ相談を始めましょう!

Screenshots

TwoDaysAgo Diary4 screens
理性くんと感情ちゃん3 screens

Verdict

The call

The clearest difference is in-app purchases: 理性くんと感情ちゃん at none against TwoDaysAgo Diary's 2. TwoDaysAgo Diary's advantage is ads (none vs shown) and update cadence (weekly vs every 3 weeks). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TwoDaysAgo Diary sells 2 one-off in-app purchases. 理性くんと感情ちゃん asks for nothing beyond the download.

UpkeepUpdate frequency

TwoDaysAgo Diary ships an update weekly, 理性くんと感情ちゃん every 3 weeks. The most recent releases landed on October 27, 2026 and October 10, 2026 respectively.

Scorecard3 real differences · 5 level
TwoDaysAgo Diary versus 理性くんと感情ちゃん: the parameters behind the verdict, then further details
ParameterTwoDaysAgo Diary理性くんと感情ちゃん
PriceFreeFree
Positive reviews—60.0% of reviews
Update frequencyWeekly — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size4 MB46 MB
Age rating4+4+
DeveloperNishida HirofumiTomoya Seki

In-app purchases

2 purchases

TwoDaysAgo Diary

One-time2
  • ReadQuotes$1.99
  • Daily Question$2.99
None

理性くんと感情ちゃん

No in-app purchases

Questions

Is TwoDaysAgo Diary free?
TwoDaysAgo Diary is free to download, with in-app purchases available.
Is 理性くんと感情ちゃん free?
理性くんと感情ちゃん is free to download, with no in-app purchases.
Do TwoDaysAgo Diary or 理性くんと感情ちゃん have ads?
理性くんと感情ちゃん shows ads; TwoDaysAgo Diary does not.
Which is updated more often, TwoDaysAgo Diary or 理性くんと感情ちゃん?
TwoDaysAgo Diary ships an update weekly, and 理性くんと感情ちゃん every 3 weeks. Most recently, TwoDaysAgo Diary was updated on October 27, 2026 and 理性くんと感情ちゃん on October 10, 2026.

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