CoTan vs ECGStudio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CoTan
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大学入試問題を参考に600以上の古文単語を収録した単語暗記アプリです。 暗記カードの形式でタップするとカードが回転してその単語の意味が分かります。覚えた単語は左右のフリックで消すことができます。 50題以上の共通テスト、早稲田大学、上智大学、MARCH、関関同立の入試問題から単語を選んでいます。 出題校の表示や、頻出度合いの表示(星3つから星1つ)により、学習のモチベーションにもつながります。 【主な機能】 ・タップで単語カードが回転し、その単語の意味が分かります。 ・上下のフリックで前後の単語に移ります。 ・左右のフリックで覚えた単語を表示させなくできます。 ・『リセット』で消した単語を全て元に戻します。 ・デフォルトは頻出度順になっていますが、『並び替え』により、アイウエオ順やランダムも可能です。
ECGStudio
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Draw ECGs while you teach — video done instantly. ECGStudio records your ECG drawings and voice narration simultaneously, turning your explanation into a shareable teaching video with one tap. No editing. No equipment. Just draw, talk, and share. Who It's For - Physicians & Residents: Turn bedside teaching into reusable video - Nurses & Med Students: Record ECG explanations with voice notes - Medical Educators: Create YouTube & social media content easily - Patient Education: Draw and explain at the bedside, clearly Key Features ECG Waveform Templates Instantly place normal sinus rhythm, P waves, QRS complexes, T waves, arrhythmias, and more. Skip setup and start teaching immediately. Intuitive Drawing Tools Pen, eraser, and select/move tools on a true ECG grid background. Pinch to zoom freely. Voice + Drawing Recorded Together Your microphone and screen are captured simultaneously. Explain as you draw — the video creates itself. One-Tap Save & Share Preview in-app, then export as MP4 to your photo library. Share to YouTube, social media, or medical training platforms. Fully Offline & Private No data sent to external servers. Everything stays on your device — safe for clinical environments and patient-facing use. Used For - ECG teaching rounds for residents - Nursing education & cardiology study groups - Patient explanation at the bedside - YouTube & TikTok medical education content - Medical school & nursing school lectures Draw. Talk. Share. ECGStudio — medical education, simplified.
Screenshots
Verdict
The clearest difference is ads: ECGStudio at none against CoTan's shown. CoTan's advantage is update cadence (every 3 days vs every 3 months) and iOS requirement (15.1 vs 26.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
CoTan ships an update every 3 days, ECGStudio every 3 months. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | CoTan | ECGStudio |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 28 MB | 9 MB |
| Age rating | 4+ | 12+ |
| Developer | Ryo Minebayashi | Keisuke Nakashima |
In-app purchases
CoTan
No in-app purchases
ECGStudio
No in-app purchases









