Comparison

Jotter vs Second Brain Vault

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

Head to head
About

Jotter

Features
Read full description

Markdown(マークダウン)に完全対応した、シンプルで美しいメモ・ノートアプリ「Jotter」。 強力なAI執筆・編集アシスタントを搭載し、テキストの執筆から画像の整理まで、あなたの思考をスムーズに形にします。 【主な特徴】 - AIが寄り添うスマートな執筆: ひらめきを逃さず、雑なメモの自動整形や行き詰まった時の執筆アシストで思考を加速します。 - LLMの対話も美しくストック: 外部AIからコピーしたMarkdownフォーマットも崩れることなく、そのままの美しさで保存できます。 - 迷わないインデックス整理: まるで手帳にインデックスシールを貼るように、直感的で整理しやすいノート構造です。 - オフライン対応 & リアルタイム同期: 電波のない場所でも思考を止めず、デバイス間を滑らかに行き来するストレスフリーな同期体験を提供します。 - 一生残る、あなたの知的財産: データロックインのないプレーンテキスト(Markdown)なので、プラットフォームに依存せず知識が永続します。 【AI執筆・編集アシスタント】 - JotPolish: 乱雑に書き殴ったメモを、文脈を維持したまま読みやすくスマートに校正・ブラッシュアップします。 - JotRefine: テキストの論理構造を解析し、適切なMarkdown見出しやリストなどを用いて見やすく構造化します。 - JotSpark: カーソル位置の文脈を読み取り、タイプライター風のアニメーションとともに続きの文章を自動的に執筆します。 - 自前APIキー対応: OpenAI や Anthropic (Claude) の独自の API キーを設定し、完全にコントロールされた環境でAIを使用することも可能です。 【主な機能】 - Markdown対応エディタ: 見出し、リスト、太字、リンクなどを記述しやすく、視覚的に美しいプレビュー表示が可能。 - 画像アップロード機能: メモ内に画像を追加し、クラウド上で一元管理。 - デバイス間の同期: スマートフォン、タブレット、PCなど、どの端末からでも同じメモにアクセス。 - 軽快なパフォーマンス: PWAベースの設計により、起動が速く、オフライン環境下でもメモの確認が可能。 【選べる3つのプラン】 - Free(無料プラン): 基本的なメモ作成機能と、500MBまでの画像保存ストレージ。 - Proプラン: AI機能 300回/月。より快適な執筆をサポートする機能と、50GBまでの画像保存ストレージ。 - Maxプラン: AI機能 3,000回/月。写真や大容量資料も余裕で収まる、500GBの超大容量画像保存ストレージ。 日常のタスク管理、仕事のアイデア出し、日記やブログの下書きなど、あらゆる執筆シーンに「Jotter」をご活用ください。

About

Second Brain Vault

Features
Read full description

Second Brain Vault isn't another folder-organizing app. You just save — the on-device AI files it for you and finds it back later when you ask in plain language. A private memory vault that lives entirely on your iPhone. We're all good at saving. The real question was always "where did I put that?" Second Brain Vault flips the order: you save, the AI organizes and recalls. HOW IT WORKS • Save in one tap — a note, a photo, a voice memo, a PDF, or a web link. Anything, instantly, into your vault. • AI organizes it for you — every saved item gets a title, a summary, a category, and tags, automatically. Photos are read with OCR, voice is transcribed, PDFs and links have their text extracted. • Recall like a person — ask "that real-estate article I read last year," "the best cold-noodle place I saved," "the app idea I jotted last month," and it finds the right memory. It's hybrid retrieval — semantic meaning plus keywords plus recency — so it works even when you don't remember the exact words. • It grows with you — Insights show your top topics and saving trends, and every week the AI writes a short Retrospective of what you saved. The more you save, the higher your Brain Level. WHAT'S INSIDE • Home — today's and recent items, plus a one-line AI insight • Quick capture — five kinds: note, photo, audio, PDF, link • Natural-language Recall — hybrid semantic + keyword + recency ranking • Insights — top topics, save volume, Brain Level growth • Weekly Retrospective — an AI recap of your week of memories • Automatic categories & tags — organized without you filing anything PRIVACY BY CONSTRUCTION Everything is processed on this iPhone. Because it uses Apple's on-device AI (Foundation Models), your notes, photos, voice and documents never leave the device. No account, no server, no ads, no tracking. The only time it uses the internet is to fetch the page of a web link you choose to save. APPLE INTELLIGENCE REQUIRED Auto-organizing, natural-language search, Insights and the Retrospective run on Apple-Intelligence-capable devices. On other devices you can still save and search by keyword; the AI features show an "Apple Intelligence required" state. START FREE, UNLOCK WHEN YOU NEED IT Free: up to 100 items, full on-device AI organizing & search on all 100, every capture type, Insights and Brain Level included. Pro (₩6,600 / year): unlimited saves, iCloud backup & sync, weekly Retrospective history, and more. Lifetime (₩29,000, one-time): everything in Pro, forever, no renewal. You save it; Second Brain Vault remembers it. Drop in your first memory today. ■ Device requirements AI auto-organizing and semantic (meaning-based) search require an Apple Intelligence–capable device — iPhone 15 Pro / 15 Pro Max and iPhone 16/17 or later, iOS 26 or later. On other devices, saving and keyword search still work fully. Everything is processed on-device; nothing is ever sent off your iPhone. ■ Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://blue-code.github.io/legal/second-brain-vault/privacy.en.html

Screenshots

Jotter4 screens
Second Brain Vault4 screens

Verdict

The call

The clearest difference is device support: Jotter at 3 against Second Brain Vault's 1. Jotter also leads on iOS requirement (15.0 vs 26.0). On price, ads and in-app purchases 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. Jotter sells 4 in-app purchases, starting at $2.99 per month and Second Brain Vault sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 3 level
Jotter versus Second Brain Vault: the parameters behind the verdict, then further details
ParameterJotterSecond Brain Vault
PriceFreeFree
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better26.0
Further details — not scored
Size16 MB2 MB
Age rating4+4+
DeveloperShota KukitaByoungho Kim

In-app purchases

4 purchases

Jotter

Subscriptions4
  • Jotter Pro(月払い)$2.991 Month
  • Jotter Max(月払い)$22.991 Month
  • Jotter Pro(年払い)$29.991 Year
Show 1 more
  • Jotter Max(年払い)$229.991 Year
1 purchases

Second Brain Vault

One-time1
  • Second Brain Vault (Lifetime)$17.99

Questions

Is Jotter free?
Jotter is free to download, with in-app purchases available.
Is Second Brain Vault free?
Second Brain Vault is free to download, with in-app purchases available.
Do Jotter or Second Brain Vault have ads?
Neither Jotter nor Second Brain Vault shows ads.

Other comparisons