Comparison

ContrastRx vs Radiology Calculators

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

Head to head
About

ContrastRx

Provides quick access to treatment regimens for life-threatening reactions to radiographic contrast agents. Includes clinical descriptions, visual examples, and treatment protocols, along with helpful calculators and information on nephrogenic systemic fibrosis.

Highlights
  • Treatment regimens for contrast reactions
  • Clinical descriptions and pictorial examples
  • eGFR calculator
  • Pediatric dose calculator
  • Steroid pretreatment regimens
  • Nephrogenic systemic fibrosis overview
Features
Read full description

This app provides quick access to treatment regimens for potentially life-threatening reactions that can occur with iodine or gadolinium radiographic contrast. Included are clinical descriptions, pictorial examples, sound clips, and treatment regimens for the various types of reactions. Also included are a pediatric dose calculator, an eGFR calculator, a self-assessment module, pretreatment medication regimens, and an overview of nephrogenic systemic fibrosis.

About

Radiology Calculators

This app provides radiologists with over 30 essential interactive tools for calculations and reporting. It offers fast, accurate, and easy-to-use calculators to streamline workflow and enhance diagnostic confidence, all available offline.

Highlights
  • 30+ essential radiology calculators
  • Reporting tools
  • Offline access
  • Favorites and reordering
  • Streamlined workflow
  • Enhanced diagnostic confidence
Features
Read full description

Designed by radiologists, for radiologists, Radiology Calculators gives you fast access to 44 essential radiology calculators and reporting tools, including TI-RADS, O-RADS, LI-RADS, PI-RADS, adrenal washout, prostate volume, and many more. Use it offline in seconds during reads, call, or daily workflow. Radiology Calculators is the ultimate mobile toolkit for medical imaging professionals, providing fast, accurate, and easy-to-use calculators to streamline your workflow and enhance your diagnostic confidence. Our clean, native interface is designed for speed and simplicity, allowing you to get the information you need in seconds, not minutes. All calculators are available OFFLINE, ensuring reliability when you need it most. A COMPREHENSIVE CALCULATOR SUITE: Body Imaging * AAST Trauma Injury Scoring (Kidney, Liver, Spleen) * Acute Cholecystitis for Gallbladder Ultrasound * Adrenal Nodule Washout for CT * Adrenal Nodule Chemical Shift on MRI * Bladder Volume * Bosniak Classification of Renal Cystic Masses * C-RADS ™ 2023 (CT Colonography) * Glomerular Filtration Rate (GFR) * Gonadal (Ovarian and Testicular) Volume * LI-RADS ® v2024 (Liver Imaging Reporting and Data System, AKA LIRADS), including Treatment Response Assessment (TRA) * Liver Steatosis (CT & MRI) * Liver Volume (CT, MRI, US) with Expected Normal * Liver Iron Quantification * O-RADS ™ 2022 (Ovarian-Adnexal Reporting and Data System, AKA ORADS) * Pancreatitis Severity Index and Collections * PI-RADS ® 2.1 (Prostate Imaging Reporting and Data System, AKA PIRADS) * Prostate Volume & PSA Density * RENAL Nephrometry Score * Spleen Index & Volume * Thyroid Volume * TI-RADS ™ (Thyroid Imaging Reporting and Data System, AKA TIRADS) Cardiothoracic Imaging * CAD-RADS ™ 2.0 * Fleischner Guidelines for Pulmonary Nodules * LUNG-RADS ® 2022 * PE-RADS ® 2026 Emergency Radiology * AAST Trauma Injury Scoring (Kidney, Liver, Spleen) * Acute Cholecystitis for Gallbladder Ultrasound * AO Spine Classification Musculoskeletal Imaging * AO Spine Classification * Bone-RADS ™ v. 2023 Neuroradiology * AO Spine Classification * ASPECTS * Bern Score Calculator for Spontaneous Intracranial Hypotension * Duke 4D CT Parathyroid Calculator for Adenoma & Hyperplasia * Intracerebral Hemorrhage (ICH) Volume * Knosp Classification for Pituitary Macroadenomas * NASCET & ECST: Carotid Stenosis based on CTA & MRA * NI-RADS ™ 2025 * Spinal Instability Neoplastic Scale (SINS) Score Nuclear Medicine * Lutathera (177Lu-DOTATATE) Dose Modification for Adverse Effects * Pluvicto (177Lu-PSMA) Dose Modification for Adverse Effects * PSMA-RADS 2.0 * Semiquantitative mIBG Modified Curie Scoring Vascular & Interventional Radiology * MELD 3.0 (Model for End-Stage Liver Disease) * NASCET & ECST: Carotid Stenosis based on CTA & MRA * PE-RADS ® 2026 * Pulmonary Embolism Severity Index (PESI) * Resistive Index * Villalta Score for Post-thrombotic Syndrome Women's Imaging * Gestational Age * Gonadal (Ovarian and Testicular) Volume * O-RADS ™ 2022 (Ovarian-Adnexal Reporting and Data System, AKA ORADS) APP FEATURES: + Favorites & Reordering: Save and sort your most-used calculators for instant access. + Powerful Search: Instantly find any calculator by name or keyword. + Customization: Tailor your experience with Dark & Light themes, haptic feedback controls, and more. + Offline Access: All calculators are available offline, ensuring 100% reliability. WHO IS THIS FOR? -> Radiologists -> Radiology Residents & Fellows -> Referring Physicians and other Medical Professionals Terms of Use: https://radathand.com/terms-and-conditions/ Privacy Policy: https://radathand.com/privacy-policy/ Important disclaimer: This application is intended for educational and informational purposes only and should be used exclusively by qualified medical professionals. It is not a substitute for professional clinical judgment. Always seek a doctor’s advice in addition to using this app and before making any medical decisions.

Screenshots

ContrastRx4 screens
Radiology Calculators4 screens

Verdict

The call

The clearest difference is review sentiment: Radiology Calculators at 100% against ContrastRx's 50%. Radiology Calculators also leads on rating (5.0 vs 4.4). ContrastRx's advantage is in-app purchases (none vs 3). On price, ratings volume, update cadence and ads 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

Both are free to download. Radiology Calculators sells 3 in-app purchases, starting at $3.99 per month. ContrastRx asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Radiology Calculators holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 9 and 6 respectively. Written reviews point the same way: 50% of ContrastRx's written reviews are positive against 100% of Radiology Calculators's.

UpkeepUpdate frequency

ContrastRx ships an update every 3 weeks, Radiology Calculators every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
ContrastRx versus Radiology Calculators: the parameters behind the verdict, then further details
ParameterContrastRxRadiology Calculators
PriceFreeFree
Rating4.4 (9 ratings)5.0 (6 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings9 — better6
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.616.4 — better
Further details — not scored
Size9 MB61 MB
Age rating17+17+
DeveloperMayo ClinicRad At Hand

Customer experience

ContrastRx

All ratings9 ratings
Positive77.8%
Neutral11.1%
Negative11.1%
Written reviews4 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

Radiology Calculators

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ContrastRx

No in-app purchases

3 purchases

Radiology Calculators

Subscriptions2
  • Pro Access (1 Month)7 Days trial$3.991 Month
  • Pro Access (1 Year)7 Days trial$39.991 Year
One-time1
  • Pro Access (Lifetime)$149.99

Questions

Is ContrastRx free?
ContrastRx is free to download, with no in-app purchases.
Is Radiology Calculators free?
Radiology Calculators is free to download, with in-app purchases available.
Which has better reviews, ContrastRx or Radiology Calculators?
Radiology Calculators is rated higher. ContrastRx averages 4.4 out of 5 from 9 ratings, while Radiology Calculators averages 5.0 from 6 ratings.
Do ContrastRx or Radiology Calculators have ads?
Neither ContrastRx nor Radiology Calculators shows ads.
Which is updated more often, ContrastRx or Radiology Calculators?
ContrastRx ships an update every 3 weeks, and Radiology Calculators every 2 weeks. Most recently, ContrastRx was updated on November 3, 2026 and Radiology Calculators on October 30, 2026.

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