TDF Calc vs NCCN Guidelines®
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TDF Calc
This app calculates the biologically effective dose (BED) for radiation therapy fractionation regimens. It allows for comparisons of different treatment schedules and helps determine dose per fraction based on desired treatment duration.
- Linear-quadratic (LQ) method implementation
- Biologically effective dose (BED) calculation
- External beam radiation therapy (EBRT) fractionation
- Low dose rate (LDR) brachytherapy
- Permanent implant brachytherapy
- Dose per fraction calculation
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TDFCalc is an application which implements the linear-quadratic (LQ) method for comparing the biologically effective dose (BED) of external beam radiation therapy (EBRT) fractionation regimens as well as low dose rate (LDR) and permanent implant brachytherapy treatments. It calculates BED for a given alpha/beta ratio as a function of the dose per fraction and number of fractions for EBRT, and initial dose rate for brachytherapy. For a predetermined BED, the app solves the quadratic equation to calculate dose per fraction as a function of the number of fractions desired. This enables quick comparison of modified fractionation regimens (e.g. hypofractionation or compensating for missing treatment fractions) vs a conventional and/or originally intended regimen.
NCCN Guidelines®
This app provides healthcare professionals with convenient access to comprehensive clinical practice guidelines for oncology. It aims to improve the quality and effectiveness of cancer care by offering evidence-based recommendations for diagnosis, treatment, and supportive services.
- Virtual Library of NCCN Guidelines
- Oncology clinical practice guidelines
- Evidence-based recommendations
- Supports cancer care decision-making
- Covers 97% of US cancer cases
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The National Comprehensive Cancer Network® (NCCN®), is pleased to present the Virtual Library of NCCN Guidelines® app formatted for iPhone & iPad. This easy-to-use and convenient format will further assist health care professionals in their implementation of the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®), thus improving the quality and effectiveness of care provided to patients with cancer. NCCN is a not-for-profit alliance of leading cancer centers devoted to patient care, research, and education. NCCN is dedicated to improving and facilitating quality, effective, efficient, and accessible cancer care so patients can live better lives. Through the leadership and expertise of clinical professionals at NCCN Member Institutions, NCCN develops resources that present valuable information to the numerous stakeholders in the health care delivery system. By defining and advancing high-quality cancer care, NCCN promotes the importance of continuous quality improvement and recognizes the significance of creating clinical practice guidelines appropriate for use by patients, clinicians, and other health care decision-makers around the world. Over the past 25 years, NCCN has developed an integrated suite of tools to improve the quality of cancer care. The NCCN Guidelines® document evidence-based, consensus-driven management to ensure that all patients receive preventive, diagnostic, treatment, and supportive services that are most likely to lead to optimal outcomes. The NCCN Guidelines are a comprehensive set of guidelines detailing the sequential management decisions and interventions that apply to 97 percent of cancer cases in the United States. In addition, separate guidelines relate to major prevention and screening topics and another set of pathways focuses on the major supportive care areas. The NCCN Guidelines provide recommendations based on the best evidence available at the time they are derived. Because new data are published continuously, it is essential that the NCCN Guidelines also be continuously updated and revised to reflect new data and new clinical information. The intent of the NCCN Guidelines is to assist in the decision-making process of individuals involved in cancer care—including physicians, nurses, pharmacists, payers, patients and their families—with the ultimate goal of improving patient care and outcomes. The NCCN Guidelines provide recommendations for appropriate care for most but not all patients; however, individual patient circumstances must be considered when applying these recommendations. Visit NCCN.org to learn more about the NCCN Guidelines as well as other NCCN Content.
Screenshots
Verdict
The clearest difference is review sentiment: TDF Calc at 100% against NCCN Guidelines®'s 13%. TDF Calc also leads on rating (5.0 vs 3.6) and iOS requirement (13.2 vs 15.0). NCCN Guidelines®'s advantage is update cadence (every 2 months vs every 67 months) and ratings volume (24 vs 1). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
TDF Calc holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: NCCN Guidelines® has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of TDF Calc's written reviews are positive against 13% of NCCN Guidelines®'s.
TDF Calc ships an update every 67 months, NCCN Guidelines® every 2 months. The most recent releases landed on October 14, 2026 and October 29, 2026 respectively.
| Parameter | TDF Calc | NCCN Guidelines® |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.6 (24 ratings) |
| Positive reviews | 100.0% of reviews — better | 12.5% of reviews |
| Number of ratings | 1 | 24 — better |
| Update frequency | Every 67 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 168 MB |
| Age rating | 4+ | 17+ |
| Developer | Eye Physics | National Comprehensive Cancer Network® |
Customer experience
TDF Calc
NCCN Guidelines®
In-app purchases
TDF Calc
No in-app purchases
NCCN Guidelines®
No in-app purchases









