# Nibomo - 無料・オープンソースの間隔反復アプリ

**無料・オープンソース**

カードを作る。 賢く復習する。 もっと覚える。

復習に最適なタイミングを知らせ、オフラインでも使え、Web・iOS・Android 間で同期できる、無料・オープンソースのフラッシュカードアプリです。フラッシュカードの作成や改善には、必要なときだけ AI を活用できます。Nibomo は以前 Flashcards Open Source App という名前でした。

[始める](https://app.flashcards-open-source-app.com)
[GitHubで見る](https://github.com/kirill-markin/flashcards-open-source-app)

クレジットカード不要。広告なし。トライアルのカウントダウンなし。

```text
この MCP サーバーを AI クライアントに追加してください:
https://mcp.flashcards-open-source-app.com/mcp
```

## Nibomo のアクティビティ

ウェブ、iOS、Android 全体の日別レビュー活動を集計値で確認できます。公開される数値は集計データであり、カードの内容、メールアドレス、個人の学習履歴は公開されません。

- [生データを見る（JSON）](https://api.flashcards-open-source-app.com/v1/global/snapshot)
- レビュー合計: 61,577
- レビューユーザー: 491
- 期間内の日数: 195
- 日別ボリュームの最大値: 1,655
- 日別ユニークユーザーの最大値: 41
- 対象期間: 2026/03/07～2026/09/17
- 最終更新: 2026年9月18日 09:00 UTC

### 日別レビューユーザー：新規とリピーター

初めてレビューした日は新規、それ以降はリピーターとして集計します。カードで Again、Hard、Good、Easy のいずれかを選ぶと、レビュー 1 回として数えられます。

### プラットフォーム別の日別レビュー

カードで Again、Hard、Good、Easy のいずれかを選ぶと、レビュー 1 回として数えられます。集計値はプラットフォーム別に表示します。

生データ（JSON）:

```json
{
  "schemaVersion": 2,
  "generatedAtUtc": "2026-09-18T09:00:01.637Z",
  "asOfUtc": "2026-09-18T00:00:00.000Z",
  "from": "2026-03-07",
  "to": "2026-09-17",
  "totals": {
    "uniqueReviewingUsers": 491,
    "reviewEvents": {
      "total": 61577,
      "byPlatform": {
        "web": 4716,
        "android": 11148,
        "ios": 45713
      }
    }
  },
  "days": [
    {
      "date": "2026-03-07",
      "uniqueReviewingUsers": 1,
      "newReviewingUsers": 1,
      "returningReviewingUsers": 0,
      "reviewEvents": {
        "total": 1,
        "byPlatform": {
          "web": 1,
          "android": 0,
          "ios": 0
        }
      }
    },
    {
      "date": "2026-03-08",
      "uniqueReviewingUsers": 0,
      "newReviewingUsers": 0,
      "returningReviewingUsers": 0,
      "reviewEvents": {
        "total": 0,
        "byPlatform": {
          "web": 0,
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          "ios": 0
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    },
    {
      "date": "2026-03-09",
      "uniqueReviewingUsers": 1,
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      "returningReviewingUsers": 1,
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        "byPlatform": {
          "web": 2,
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          "ios": 27
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          "android": 0,
          "ios": 4
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          "android": 0,
          "ios": 58
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      }
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  ]
}
```

## 特長

役立つフラッシュカードの作成、最適なタイミングでの復習、オフライン学習、学習データの管理に必要な機能がそろっています。

- **FSRS で賢く復習** - 今日が期限のフラッシュカードを復習しましょう。FSRS は難しいフラッシュカードを早めに、覚えたフラッシュカードをより長い間隔で表示します。
- **AI を使ったフラッシュカード作成** - AI にフラッシュカードの作成や文章の改善、答えの説明を手伝ってもらえます。保存する内容は自分で決められます。
- **オフライン学習と自動同期** - インターネットがなくてもモバイル端末で復習できます。変更は自動で同期され、Web・iOS・Android のどこからでも続けられます。
- **データをインポート・エクスポートして自分で管理** - 学習素材はいつでも出し入れできます。持ち運べるエクスポートには、フラッシュカード、タグ、関連メディアが含まれます。
- **AI エージェントと連携** - MCP または Agent API で接続すると、AI エージェントがフラッシュカードの作成、改善、整理を手伝えます。
- **無料でセルフホスト可能** - ホスト版を無料で使う、オープンソースのコードを確認する、自分の環境で運用するという選択ができます。

---
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