Comparison

Opioids Dosage Conversion vs KidDose.

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

Head to head
About

Opioids Dosage Conversion

This app is a calculator for trained medical professionals to convert opioid analgesic dosages. It supports various common opioids and administration routes, offering features like breakthrough dosing and cross-tolerance calculations.

Highlights
  • Opioid dosage conversion
  • Multiple drug support
  • Multiple route support
  • Breakthrough dosing calculator
  • Incomplete cross tolerance option
  • Instructional details
Features
Read full description

Opioids by Chris Marcellino MD and Norris Vivatrat MD is an opioid analgesic dosage conversion calculator for use by trained medical professionals. The application supports conversion to and from opioids commonly prescribed and used in U.S. hospitals orally, parenterally, or transdermally, including morphine, codeine, hydromorphone, hydrocodone, fentanyl, methadone, oxycodone and oxymorphone. The application is intended to help and instruct in the process of conversion of opioid regimens. • Native support for iPhone, iPad and iPod touch • Multiple route support • Multiple drug support • Incomplete cross tolerance option • Breakthrough dosing calculator • Provides instructional details about each calculation • Saves last calculation on exit • Supports landscape and portrait modes • Reference guide By Professor EBM, the Internal Medicine Residency Teaching Resource for Evidence-Based Medicine: http://www.professorebm.com/, a resource of the Santa Clara Valley Medical Center. While effort has been made to ensure that calculations are accurate and that conversion factors are in accordance with current accepted medical practices, use of this application is entirely at your own risk. This application should only be used by trained medical professionals and all results should be double checked by hand. Use of the app requires acceptance of the terms of use that are included with the application. Please send support requests and feedback using the link in the About tab of the app, though as a free academic tool we only have limited resources to address new feature requests. Opioid equipotency data is taken from CAPC conversion values except where noted (see the reference tab in the app.) CAPC values are as published in the Center to Advance Palliative Care Prescribing Opioids: A Reference Guide curriculum, which are adapted from McPherson ML. Demystifying Opioid Conversion Calculations: A Guide for Effective Dosing, 2nd ed. American Society of Health-System Pharmacists, Bethesda, Maryland, 2018. EPEC values are as published in EPEC-O Participants Handbook, 2005. Chris Marcellino, MD — Mayo Clinic Norris Vivatrat, MD — UCSD Medical Center Special thanks to Dr. Tom Mouser (EveryStep, Des Moines, IA) and Dr. David Rand (UVM Medical Center).

About

KidDose.

This pediatrician-created app calculates precise medication dosages for children based on their weight. It covers common over-the-counter medications, ensuring safe and quick administration. Always consult your doctor before giving any medication.

Highlights
  • Weight-based dosage calculation
  • Covers common OTC medications
  • Pediatrician-developed
  • Safe and quick dosage determination
  • Supports iPhone and iPod
Features
Read full description

Pediatrician-made calculator that shows your child’s exact medication dose, safely and quickly! This weight based dosage calculator is for over-the-counter children’s medications, including Tylenol® Motrin® Advil® Benadryl® Zyrtec® Please note that this app contains dosing information according to manufacturer and current clinical guidelines, and does not provide medical advice, diagnosis, treatment, or recommendations to take any medication. Please always consult your child’s own doctor before administering any medication, independently verify the dosage information with your doctor, and always defer to your doctor’s guidelines on dosing any medicine.

Screenshots

Opioids Dosage Conversion4 screens
KidDose.3 screens

Verdict

The call

The clearest difference is rating: KidDose. at 5.0 against Opioids Dosage Conversion's 4.3. KidDose. also leads on review sentiment (100% vs 78%) and iOS requirement (12.4 vs 15.6). Opioids Dosage Conversion's advantage is in-app purchases (none vs 1). 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. KidDose. sells 1 one-off in-app purchase. Opioids Dosage Conversion asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KidDose. holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 18 and 24 respectively. Written reviews point the same way: 78% of Opioids Dosage Conversion's written reviews are positive against 100% of KidDose.'s.

UpkeepUpdate frequency

Opioids Dosage Conversion ships an update every 4 months, KidDose. every 2 months. The most recent releases landed on September 17, 2026 and June 8, 2026 respectively.

Scorecard5 real differences · 5 level
Opioids Dosage Conversion versus KidDose.: the parameters behind the verdict, then further details
ParameterOpioids Dosage ConversionKidDose.
PriceFreeFree
Rating4.3 (18 ratings)5.0 (24 ratings) — better
Positive reviews77.8% of reviews100.0% of reviews — better
Number of ratings1824 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.612.4 — better
Further details — not scored
Size2 MB30 MB
Age rating17+17+
DeveloperChris Marcellino MD LLCAsk Doctor Amy LLC

Customer experience

Opioids Dosage Conversion

All ratings17 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews45 reviews
Positive77.8%
Neutral13.3%
Negative8.9%

KidDose.

All ratings24 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Opioids Dosage Conversion

No in-app purchases

1 purchases

KidDose.

One-time1
  • Remove Ads for small fee$4.99

Questions

Is Opioids Dosage Conversion free?
Opioids Dosage Conversion is free to download, with no in-app purchases.
Is KidDose. free?
KidDose. is free to download, with in-app purchases available.
Which has better reviews, Opioids Dosage Conversion or KidDose.?
KidDose. is rated higher. Opioids Dosage Conversion averages 4.3 out of 5 from 18 ratings, while KidDose. averages 5.0 from 24 ratings.
Do Opioids Dosage Conversion or KidDose. have ads?
Neither Opioids Dosage Conversion nor KidDose. shows ads.
Which is updated more often, Opioids Dosage Conversion or KidDose.?
Opioids Dosage Conversion ships an update every 4 months, and KidDose. every 2 months. Most recently, Opioids Dosage Conversion was updated on September 17, 2026 and KidDose. on June 8, 2026.

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