TSUNDOKU vs echor|Idea Notes & Quotes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TSUNDOKU
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「積読(つんどく)」を、もっと美しく、もっと楽しく。 TSUNDOKUは、あなたの読書ライフを静かにサポートする、 和モダンデザインの蔵書管理アプリです。 買ったけれどまだ読んでいない本、読みかけの本、読み終わって心に残った本。 それらをただリスト化するのではなく、 心地よいデザインで管理することで、読書のモチベーションを高めます。 【主な機能】 ■ バーコードでサクサク登録 本の裏表紙にあるバーコードをカメラで読み取るだけで、 書誌情報を自動取得。手入力の手間なく、一瞬で本棚に追加できます。 ■ 3つのステータス管理 「積読中」「読書中」「読了」の3つの状態で本を管理。 今自分がどれくらい本を溜めているのか、どれくらい読んでいるのかがひと目でわかります。 ■ 読書メモと感想 読了後の感想や、読みかけの際のメモを記録できます。 心に響いたフレーズを残しておきましょう。 ■ 和モダンなデザイン 日本の伝統色「利休茶」「胡粉色」などを取り入れた、 目に優しく落ち着いた配色のUI。 【プレミアムプラン(もっと!TSUNDOKUプラン)】 サブスクリプション、または買い切りプランに登録することで、 以下の機能が解放されます。 1. iCloud同期 複数のiPhoneやiPad間でデータを自動同期。自宅のiPadで登録した本を、 外出先のiPhoneで確認できます。機種変更時のデータ移行もスムーズです。 2. 広告の非表示 画面下部のバナー広告が非表示になり、より広く、より没入感のある画面で読書管理を行えます。 3. 今後の新機能への先行アクセス 今後追加される便利な機能を追加費用なしで利用できます。 「積読」は決して悪いことではありません。それは知識への好奇心の表れです。 TSUNDOKUアプリと共に、あなたの好奇心を美しく積み上げていきましょう。 【利用規約・プライバシーポリシー】 https://gentlesong.tech/tsundoku/legal.html
echor|Idea Notes & Quotes
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echor is a quiet note-taking app for saving ideas that come to you and lines that stay with you—without organizing them, so you can encounter them again someday. Folders aren’t your thing. Keeping notes neatly organized never lasts. Still, when a phrase comes to mind or a sentence feels worth remembering, you want somewhere to leave it without letting it disappear. That’s what echor is for. Most note apps are designed to organize information or help you work more efficiently. But not every thought can be categorized right away. An idea before it becomes a story. A line that lingers after a book or film. Something someone said that you can’t quite forget. A feeling you don’t yet have a name for. A seed of an idea that may become something someday. echor is a place to quietly leave those small fragments, without deciding where they belong. ■ Capture a thought as soon as it appears Save short lines and ideas the moment they come to you. ・Seeds for stories and creative work ・Lines from books and novels ・Dialogue from films and comics ・Fragments of conversation ・Late-night thoughts, unease, and realizations ・Quotes and phrases you want to revisit No folders or categories required. Leave a thought just as it is, before you organize it. ■ Rediscover words from your past Three of your saved entries appear unexpectedly in speech bubbles. Something your past self wrote may reach you differently now. New ideas may emerge from the unexpected combination of words shown together. Notifications can also bring back something you saved before. Not to remind you of a task, but to help you encounter a forgotten thought again. ■ Look back on what you’ve collected All the words you’ve saved are always available in one list. Even without careful organization, they gradually accumulate over time. When something no longer needs to stay, you can let it go. ■ Keep longer thoughts in Notes When an idea or piece of writing is too long for a short entry, you can keep it in Notes. A place for fragments, and a place to think a little longer. Both can live in the same app. ■ Copy, share, back up, and restore Copy saved words as text or turn them into an image to share. Backup and restore are supported, so your words can move with you when you change devices. You don’t have to write every day like a diary. You don’t have to organize everything neatly like a notebook. It doesn’t have to be productive like a work memo. The words you keep may one day trace the outline of who you are. echor is for people who want a quiet place to keep ideas, reading notes, film notes, quotes, and fragments of conversation together. Available in Japanese, English, Simplified Chinese, and Korean.
Screenshots
Verdict
The clearest difference is in-app purchases: echor|Idea Notes & Quotes at none against TSUNDOKU's 3. echor|Idea Notes & Quotes also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). TSUNDOKU's advantage is update cadence (every 2 days vs every 8 days). 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
Both are free to download. TSUNDOKU sells 3 in-app purchases, starting at $0.99 per month. echor|Idea Notes & Quotes asks for nothing beyond the download.
TSUNDOKU ships an update every 2 days, echor|Idea Notes & Quotes every 8 days. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.
| Parameter | TSUNDOKU | echor|Idea Notes & Quotes |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 8 days |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | HeberekeKomachi | dannpen |
In-app purchases
TSUNDOKU
- もっと!TSUNDOKUプラン(月額)$0.991 Month
- もっと!TSUNDOKUプラン(年額)$11.991 Year
- もっと!TSUNDOKUプラン(買い切り)$24.99
echor|Idea Notes & Quotes
No in-app purchases
Questions
Is TSUNDOKU free?
Is echor|Idea Notes & Quotes free?
Do TSUNDOKU or echor|Idea Notes & Quotes have ads?
Which is updated more often, TSUNDOKU or echor|Idea Notes & Quotes?
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