# BED Calculator : Radiotherapy — BED EQD2 & Fraction Calculator > Radiation oncology tool for calculating Biological Effective Dose (BED) and EQD2. (iPhone/iPad app by MARGINAL GAINS INC..) - Source: https://appshunter.io/ios/app/bed-calculator-radiotherapy/id397088240 (this page in markdown: same URL + `.md`) - Developer: [MARGINAL GAINS INC.](https://appshunter.io/developer/1790407458) - Category: Medical - Price: Free - Rating: 5.00/5 from 3 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 16.6 · 4 MB - Languages: American English - Released: 2010-10-14 - Data updated: 2026-08-17 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/bed-calculator-radiotherapy/id397088240/reviews.md ## What is BED Calculator? BED Calculator is a professional-grade tool for computing Biological Effective Dose (BED) and Equivalent Dose in 2 Gy fractions (EQD2) using the Linear-Quadratic (LQ) model. Developed for radiation oncologists, medical physicists, and radiation therapy technologists, it enables rapid and reliable dose calculations in an efficient, streamlined interface — now available on Apple Watch. Features Intuitive scroll-based input for swift BED and EQD2 calculation Cumulative dose summation across up to 3 separate treatment courses Fractionation conversion: calculate the number of fractions required to achieve an equivalent BED at a modified dose per fraction, and vice versa Apple Watch support for quick calculations Dark Mode support Disclaimer This application is intended for educational and academic reference purposes only. It is not intended for direct clinical decision-making. Any clinical application is undertaken solely at the user's own discretion and responsibility. The developer accepts no liability for any loss or damage arising from the use of this application. ## Key features - Biological Effective Dose (BED) calculation - Equivalent Dose in 2 Gy fractions (EQD2) calculation - Linear-Quadratic (LQ) model - Cumulative dose summation - Fractionation conversion - Apple Watch support ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/bed-calculator-radiotherapy/id397088240/reviews.md ### 5/5 — great - thanks! *2012-06-21* nice app, very handy and easy to use ### 5/5 — 早速インストール！！ *2012-05-27* BED計算のIPhoneアプリがあるなんて感激です。(^-^)/ ### 5/5 — 良アプリ *2012-03-06* 次回バージョンアップ時には治療期間、潜在倍加時間を入れて下さい。 ### 5/5 — good *2011-03-31* 有料の高価なアプリよりはるかに使い易いです。 ### 5/5 — 大変いいです *2010-10-19* 日頃悩んでいることが解決出来ました。有難うございます。 ## Frequently asked questions about BED Calculator ### What is the BED Calculator used for? The BED Calculator is used for computing Biological Effective Dose (BED) and Equivalent Dose in 2 Gy fractions (EQD2) based on the Linear-Quadratic (LQ) model, primarily for radiation oncology professionals. ### Who developed the BED Calculator? The BED Calculator was developed by MARGINAL GAINS INC. and is intended for educational and academic reference purposes. ### Does the BED Calculator have ads? No, the BED Calculator does not contain advertisements. It is a free application without any ads. ### What devices does the BED Calculator support? The BED Calculator supports a range of Apple devices, including the Apple Watch, iPhone, and iPad, allowing for calculations across different platforms. ### How often is the BED Calculator updated? The latest version of the BED Calculator is 2.0, which was last updated on March 12, 2026. This indicates a commitment to maintaining and improving the application. ### What is the age rating for the BED Calculator? The BED Calculator has an age rating of 4+, making it suitable for a wide range of users interested in medical calculations. ### Can the BED Calculator be used for direct clinical decisions? No, the application is intended for educational and academic reference purposes only and is not meant for direct clinical decision-making. Any clinical application is at the user's own discretion and responsibility. ### What are the key calculation features of the BED Calculator? Key features include intuitive scroll-based input for swift BED and EQD2 calculations, cumulative dose summation across up to three treatment courses, and fractionation conversion. ## Version history (last 5 releases) ### 2.0 — 2026-03-12 Apple Watch support added Comprehensively redesigned user interface Multi-course dose summation now supported Dark Mode support added Full compatibility with the latest iOS ### 1.5.0 — 2017-07-17 support for new iOS minor improvement ### 1.2.0 — 2012-01-13 bug fix for iOS5 minor improvement ### 1.1.0 — 2010-10-28 Bug fix ### 1.0 — 2010-10-14 No release notes. ## Apps similar to BED Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [ScanDose](https://appshunter.io/ios/app/scandose/id6745400483) | — | $1.99 | Medical | | [Roxudo Dose Calculator](https://appshunter.io/ios/app/roxudo-dose-calculator/id6754866530) | — | Free | Medical | | [RO Toolbox](https://appshunter.io/ios/app/ro-toolbox/id968361326) | 4.5 (4) | Free | Medical | | [BED LQ Calc](https://appshunter.io/ios/app/bed-lq-calc/id6749206758) | — | Free | Medical | | [GeneSilico](https://appshunter.io/ios/app/genesilico/id6654902700) | 5.0 (2) | Free | Medical | | [Radiation Oncology: Review](https://appshunter.io/ios/app/radiation-oncology-review/id6483211494) | — | Free | Medical | ## More apps by MARGINAL GAINS INC. - [時計式タイマー](https://appshunter.io/ios/app/id6741380268) - [こえサポート：AI合成音声で会話をサポート](https://appshunter.io/ios/app/ai/id6748308969) - [きふみAI - 将棋AI解析と棋譜管理](https://appshunter.io/ios/app/ai-ai/id6754811804) - [10分名刺](https://appshunter.io/ios/app/10/id6758945685) - [10分フォトカレンダー](https://appshunter.io/ios/app/10/id6759637659) All apps by MARGINAL GAINS INC.: https://appshunter.io/developer/1790407458 ## Related topics [radiation calculator](https://appshunter.io/ios/topics/radiation-calculator) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*