Comparison

TDF Calculator vs Rad Onc Tables

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TDF Calculator

This app simplifies the calculation of normal tissue tolerance dose in radiotherapy using the TDF factor. It offers an easy-to-use interface for radiation oncology professionals to quickly obtain results and understand the impact of fractionation on different tissues.

Highlights
  • Calculates TDF factors for normal tissue tolerance dose
  • Supports two TDF factor versions (1973 and 1986)
  • Calculates TDF factors for three different conditions simultaneously
  • Automatically sums TDF factors
  • Calculates related total or fraction dose
  • Organizable with URL scheme
Features
Read full description

- In practice of radiotherapy, it is very important to check the normal tissue tolerance dose. - TDF factor defined by Orton et al. is one of the tool to estimate the normal tissue tolerance dose for radiotherapy, but one of the problem is too complex and too many parameters to calculate. - We considered that it is wonderful to calculate it with iPhone, iPod and iPad that we carry always. - That’s why we designed new App “TDF Calculator”. - Considering use in practice, primary concept of design is easy to use and quick to get the results. - Please try TDF Calculator! We have released “EQD Calculator” that is capable to calculate the BED and EQD with LQ-model. Please, try also “EQD Calculator”. See “View More by This Developer” appeared above. #Strong points - This App is designed for the professionals working in the field of Radiation Oncology. - Although there are a lot of numbers on the screen, this App is designed to look like a table calculation, therefore you can understand easily the indication of each values. - You can organize this App with URL scheme (jp.37.TDFcalculator://) in other Apps such as launchers. #Main features - This App calculates TDF factors that is defined by Orton et al. and is one of the tool to estimate the normal tissue tolerance dose for radiotherapy. - Although we are usually using the BED defined by LQ-model for comparing the treatments recently, we thinks that the TDF factor is also useful tool, using it appropriately. - TDF factors are given 100 as a full tolerance for each tissues, so you can find the numbers as difference among the each tissues effected by fractionation. Therefore, this - App maybe also good educational tool about radiotherapy. - This App can calculate 2 type of TDF which are published in 1973 and 1986 by Orton et al. - This App can also calculate TDF factors together in three different conditions stated by three items (fraction dose, number of fractions and frequency per week), and the summation of them automatically. - Setting either a total dose or a fraction dose, related fraction dose or total dose is calculated respectively, depending on the fractionation times. - The formulas and parameters in this App are cited mainly from the two literatures published in 1973 and 1988. - TDF factors have some limitations such as unsuitable for irradiation with under 4 fractions, therefore you should check carefully the reference literatures before using this App. - This App (from ver.1.2.0) is just designed for iPhone and iPad with iOS8. #References 1. Orton CG, Ellis F: A simplification in the use of the NSD concept in practical radiotherapy. Br J Radiol 1973;46:529-537. 2. Orton CG: Bioeffect dosimetry in radiation therapy. Radiation Dosimetry: Physical and Biological Aspects (Orton CG ed.) Plenum Press, New York, 1986. 3. Orton CG, Cohen L: A unified approach to dose-effect relationships in radiotherapy. I: Modified TDF and linear quadratic equations. Int J Radiat Oncol Biol Phys 1988;14:549-556. #Disclaimer Please check carefully End User License Agreement (EULA) before using the App. Additionally, you may not use this App unless you agree to terms included below. You agree to assume full and sole responsibility for any use of this App. We are not responsible for any damages or injury, including but not limited to special or consequential damages, that result from your use of (or inability to use) this App, including any damages or injury caused by any failure of performance, error, omission, interruption, defect, delay in operation, computer virus, or other computer malfunction.

About

Rad Onc Tables

Access concise research summaries and direct links for radiation oncology. This tool aids professionals in quickly finding and referencing relevant studies.

Highlights
  • Quick research summaries
  • Direct research links
  • Radiation oncology focus
  • Reference tool
  • Summarized findings
Features
Currently charting
Read full description

A quick reference tool for finding, summarizing, and linking directly to research related to radiation oncology.

Screenshots

TDF Calculator4 screens
Rad Onc Tables4 screens

Verdict

The call

The clearest difference is price: TDF Calculator at Free against Rad Onc Tables's $9.99. TDF Calculator also leads on iOS requirement (8.0 vs 17.0). Rad Onc Tables's advantage is review sentiment (100% vs 67%) and ratings volume (23 vs 1). On rating, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

TDF Calculator is free to download; Rad Onc Tables costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for TDF Calculator against 5.0 for Rad Onc Tables. That said, the two scores are not equally well evidenced: Rad Onc Tables has 23 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 67% of TDF Calculator's written reviews are positive against 100% of Rad Onc Tables's.

UpkeepUpdate frequency

TDF Calculator ships an update every 3 weeks, Rad Onc Tables every 2 weeks. The most recent releases landed on September 25, 2026 and October 29, 2026 respectively.

Scorecard6 real differences · 5 level
TDF Calculator versus Rad Onc Tables: the parameters behind the verdict, then further details
ParameterTDF CalculatorRad Onc Tables
PriceFree — better$9.99
Rating5.0 (1 ratings) — better5.0 (23 ratings)
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings123 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#81 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better17.0
Further details — not scored
Size14 MB49 MB
Age rating17+12+
DeveloperHiroyuki KATOHMatthew Culbert

Customer experience

TDF Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Rad Onc Tables

All ratings23 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

TDF Calculator

No in-app purchases

None

Rad Onc Tables

No in-app purchases

Questions

Is TDF Calculator free?
TDF Calculator is free to download, with no in-app purchases.
Is Rad Onc Tables free?
Rad Onc Tables costs $9.99, with no in-app purchases.
Which has better reviews, TDF Calculator or Rad Onc Tables?
TDF Calculator is rated higher. TDF Calculator averages 5.0 out of 5 from 1 ratings, while Rad Onc Tables averages 5.0 from 23 ratings.
Do TDF Calculator or Rad Onc Tables have ads?
Neither TDF Calculator nor Rad Onc Tables shows ads.
Which is updated more often, TDF Calculator or Rad Onc Tables?
TDF Calculator ships an update every 3 weeks, and Rad Onc Tables every 2 weeks. Most recently, TDF Calculator was updated on September 25, 2026 and Rad Onc Tables on October 29, 2026.

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