Blood Gas & CAG Dojo vs 酸素ボンベの残量計算 / O2Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blood Gas & CAG Dojo
This app offers two distinct training modules for medical professionals. One focuses on interpreting arterial blood gases through a gamified, multi-level approach. The other provides an interactive simulator for learning coronary angiography techniques.
- Arterial blood gas interpretation
- Seven levels of blood gas learning
- Coronary angiography simulation
- Interactive C-arm control
- 3D coronary artery atlas
- Case-based learning
- Quizzes and scoring
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Two trainers for the cardiac emergency setting, in one app. Blood Gas Dojo teaches you to read an arterial blood gas the way clinicians do — numbers → classification → diagnosis — in seven levels. CAG Dojo lets you learn coronary angiography by swinging the C-arm and taking the pictures yourself on a live, computed angiogram. For physicians, residents, medical students, nurses, radiologic technologists and cath lab staff. Available in 9 languages. BLOOD GAS DOJO Acid–base balance in seven levels, each with a lesson and a 5-question quiz: 1. Read the direction from pH 2. Respiratory or metabolic? (the four patterns) 3. From the numbers to a diagnosis 4. The anion gap (calculation, classification, albumin correction) 5. Spot the compensation 6. Put it together with the case (history, vitals, other labs) 7. Mixed disorders by formula (Winter's formula and more) • Lessons: introduction → figure → key points → step-by-step method → common pitfalls. Figures include the pH scale, lungs vs. kidneys, the four-pattern table, the anion gap as stacked bars, the direction of compensation and the prediction formulas • Questions: blood gas values on a lab-report style panel with reference-range scales and ↑↓ flags. Case questions show the patient, presentation, vital signs and findings • Explanations: numbered in the order you should think, with a one-line takeaway • Scoring: 100 per correct answer plus speed and streak bonuses. Ranks from F to S, personal bests, and Game Center leaderboards • A reference-value table is always one tap away CAG DOJO An educational simulator for coronary angiography (CAG). Every X-ray image is computed in real time on your device. • Angiography viewer: rotate the C-arm freely (LAO/RAO, cranial/caudal) and inject with a 3D control syringe. Zoom, vessel names, AHA segment numbers and a 3D comparison. Nine cases from normal coronaries to a total RCA occlusion, plus a stenosis maker that places a 50–99% lesion or total occlusion at any segment from #1 to #14 • C-arm explorer: keep the contrast flowing while you swing the C-arm, and watch how each angle changes the coronary view alongside a 3D scene of patient, heart and C-arm • Compare with real images: real coronary angiograms (anonymized cine runs from a public dataset) side by side with the simulation at the same angle, with expert segment labels in color, and a quiz on recognizing projections • 3D coronary atlas: a beating, high-resolution 3D heart with coronary arteries and veins. Tap for names and AHA segments, see through the myocardium, show perfusion territories, inject in 3D • Lessons and quizzes: four lessons (anatomy and AHA segments, standard projections, the procedure, complications) and five quizzes (projection, vessel name, stenosis site, stenosis grade, reading) PRICE Blood Gas Dojo is completely free. In CAG Dojo, two viewer cases, the C-arm explorer, the 3D atlas, the first two lessons, the projection quiz and some real images are free (ad-supported). PRO, a one-time in-app purchase, removes the ads and unlocks every CAG Dojo case, the stenosis maker, all real images and every lesson and quiz. Restore Purchases brings PRO back on another device. LANGUAGES English, Japanese, Italian, German, French, Polish, Korean, and Chinese (Simplified and Traditional) — switch on the title screen. PLEASE NOTE This app is for education and training. The blood gas values in the questions were written for teaching and are not data from real patients. The anatomy and angiograms in CAG Dojo are computed simulations (the real images in “Compare with real images” are anonymized angiograms from the public CARDIAG dataset, Lau et al. 2026, CC BY 4.0). It is not a medical device and must not be used for diagnosis, treatment or any other clinical decision.
酸素ボンベの残量計算 / O2Calc
This medical utility app assists healthcare professionals with critical oxygen management calculations. It offers features like oxygen remaining time estimation, FiO2 calculation, and pressure unit conversion, all within a clean, ad-free, and offline-capable interface.
- Oxygen remaining time calculation
- FiO2 estimation by device
- Pressure unit conversion
- 3-stage abnormal value alerts
- Double-check screen
- Independent dark mode
- Live Activities & Dynamic Island integration
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酸素管理の計算、これ一択。 業務中の酸素残量計算、毎回電卓で計算し直していませんか? O2Calc(オーツーカルク)は、医療従事者のニーズから生まれた「酸素残量・FiO2推定・圧力単位変換」の専用計算ツールです。 クリーンなUI、広告なし、ログイン不要。完全オフライン対応で、電波の届きにくい病棟内でも一瞬で正確な答えを出します。 -------------------------------------------------- 現場の「困った」を解決する5つの答え -------------------------------------------------- ・目に優しい:深夜の暗い処置室でも目に刺さらない「独立型ダークモード」。 ・集中を妨げない:広告ゼロ。誤タップや待ち時間のストレスから解放されます。 ・計算ミスの撲滅:安全チェックとダブルチェック画面で、確実な安全を担保。 ・電波不問:地下や遮蔽された病室でも、完全オフラインで動作。 ・操作性:片手で、急いでいる時でも打ちやすい専用カスタムキーボード。 -------------------------------------------------- 徹底したプロ仕様の機能群 -------------------------------------------------- 【計算機能】秒で出せる正確な数値 ・酸素残量計算:ボンベ容積・現在圧・使用流量を入れるだけ。使用可能量(L)と交換目安時間を即座に算出。2MPa安全マージンを自動考慮。 ・FiO2推定:鼻カニューレ / シンプルマスク / リザーバーマスク / Venturiマスクのデバイス別に流量から吸入酸素濃度(%)を推定。 ・圧力単位変換:MPa・kgf/cm²・kPa・cmH₂O・mmHg の5単位をリアルタイムで相互変換。 【安全機能】ヒヤリハットを未然に防ぐ ・3段階の異常値アラート:計算結果が通常の参考範囲を外れると、画面色の変化とバイブレーションで警告。「正常 / 要確認 / 注意」を直感的に判別。 ・ダブルチェック専用画面:結果を画面いっぱいに表示。同僚との指差し確認や、忙しい合間のセルフチェックに最適です。 【夜間勤務特化】暗闇でのパフォーマンスを最大化 ・独立型ダークモード:システム設定とは別に、アプリ内だけで即座に切り替え。周囲への光漏れを抑えつつ視認性を確保。 ・カスタムテンキー:OS標準キーボードの「出し入れ」の手間を排除。大きく押しやすいボタンで、入力ミスを物理的に防ぎます。 【最新体験】スマホを閉じても安心が続く ・Live Activities & Dynamic Island:タイマーのカウントダウンをロック画面にリアルタイム表示。アプリを開かなくても「残り時間」が常にわかります。 ・マルチタイマー & 通知:複数患者の酸素管理を同時に管理。バックグラウンドでも、設定時刻に音と振動で確実にお知らせ。 ・無制限の履歴:すべての計算を自動保存。振り返りや記録への転記もスムーズです。 -------------------------------------------------- プライバシーと信頼性 -------------------------------------------------- ・完全ローカル処理:酸素管理データや患者様の計算データは一切サーバーに送信されません。デバイス内だけで完結します。 ・透明な運営:個人を特定する情報の収集は行いません。アプリの品質向上や最適なコンテンツ配信にのみ、匿名の統計情報を活用します。 -------------------------------------------------- 価格について -------------------------------------------------- O2Calcは「7日間無料体験 → アプリ内課金(買い切り型・1回だけ購入)」というシンプルな価格体系です。 ・無料体験:インストール後7日間は、上記の計算機能・安全機能・タイマー機能などをすべてお試しいただけます。 ・無料体験終了後:引き続きすべての機能をご利用いただくには、1回限りのアプリ内課金(永久ライセンス)のご購入が必要です。 ・購入後は追加費用なし:サブスクリプションのような継続課金や、機能ごとの個別課金は一切ありません。 -------------------------------------------------- 免責事項 -------------------------------------------------- 本アプリは酸素残量・FiO2推定・圧力単位変換の算術計算を行うユーティリティです。医療的な診断、治療、投与量の判断を行うものではありません。すべての計算結果は、必ず担当医師・薬剤師の指示、および院内プロトコルと照合のうえ、医療従事者の責任と判断のもとで使用してください。
Screenshots
Verdict
The clearest difference is in-app purchases: 酸素ボンベの残量計算 / O2Calc at none against Blood Gas & CAG Dojo's 1. 酸素ボンベの残量計算 / O2Calc also leads on update cadence (every 6 weeks vs every 4 months). Blood Gas & CAG Dojo's advantage is iOS requirement (16.0 vs 18.0). On price, review sentiment, ads and monetization model 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. Blood Gas & CAG Dojo sells 1 one-off in-app purchase. 酸素ボンベの残量計算 / O2Calc asks for nothing beyond the download.
Blood Gas & CAG Dojo ships an update every 4 months, 酸素ボンベの残量計算 / O2Calc every 6 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | Blood Gas & CAG Dojo | 酸素ボンベの残量計算 / O2Calc |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 144 MB | 8 MB |
| Age rating | 4+ | 17+ |
| Developer | Tsunehiro Takeuchi | Kazuhiro Higuchi |
Customer experience
Blood Gas & CAG Dojo
酸素ボンベの残量計算 / O2Calc
In-app purchases
Blood Gas & CAG Dojo
- PRO$10.00
酸素ボンベの残量計算 / O2Calc
No in-app purchases
Questions
Is Blood Gas & CAG Dojo free?
Is 酸素ボンベの残量計算 / O2Calc free?
Do Blood Gas & CAG Dojo or 酸素ボンベの残量計算 / O2Calc have ads?
Which is updated more often, Blood Gas & CAG Dojo or 酸素ボンベの残量計算 / O2Calc?
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