Comparison

Bone Age vs Calcium Correction

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

Head to head
About

Bone Age

This medical app calculates bone age using the Tanner-Whitehouse method, offering TWII and TWIII references for 'RUS', 'TW20', and carpal scores directly in a clinical setting.

Highlights
  • Tanner-Whitehouse method calculation
  • TWII and TWIII references
  • RUS score calculation
  • TW20 score calculation
  • Carpal score calculation
  • In-clinic use
Features
Read full description

Calculate a bone age without using an atlas right there in clinic using the Tanner-Whitehouse method. Both TWII and TWIII references are included, to give 'RUS', 'TW20' and even carpal scores.

About

Calcium Correction

This medical calculator assists endocrinology specialists and general medics in adjusting calcium readings based on albumin levels. It offers a guided 'wizard' format for intuitive use, aiming to improve accuracy, efficiency, and patient safety in assessment and treatment protocols.

Highlights
  • Albumin-based calcium adjustment
  • Guided 'wizard' format
  • Patient results management
  • Data transfer options
  • Integrated information sections
  • Touch ID and PIN protection
Features
Read full description

INTRODUCTION: From the creators of the original iOS Clinical Diagnosis App range comes "Calcium Correction for Hypoalbuminemia", an interactive medical calculator that helps Endocrinology Specialists and General Medics alike to adjust a patient's calcium reading based upon their albumin level. APP OVERVIEW: Akin to other Doctot Apps, the care pathway within is presented in a "wizard" format, which quickly and intuitively guides the user through the various steps that are involved. Underpinned by an innovative design philosophy (please see http://www.doctot.com/key-strengths for more), this Doctot "X Series" App has been crafted to help improve the accuracy, efficiency, clarity, reliability, accessibility, usability, and speed of Calcium Correction-related assessment/treatment protocols. To assist the user, each scale has a comprehensive Information section that provides relevant background details, as well as an in-depth Help section. FURTHER FEATURES: To help meet differing needs of Medical Professionals, Doctot included within Calcium Correction for Hypoalbuminemia: - a Patient Results Management System - Patient Assessment Result Data Transfer options - Integrated Information/News sections - Touch ID and PIN Protection Security options - Networking and Messaging functionality BENEFITS: Like all of our Clinical Diagnosis Apps, Calcium Correction for Hypoalbuminemia was created to help: - Make More Informed Clinical Decisions - Enhance Patient Safety - Reduce the Risk of Medical Errors - Provide Greater Treatment Recommendations and Management Strategies - Treat and Manage Greater Patient Numbers - Save Critical Time DOWNLOAD FOR FREE: An independent, not-for-profit organisation that the likes of GOLD, the IOF and SINTEF chose to partner with, Doctot (which is spearheaded by Prof. Declan Lyons, a Consultant Geriatrician and MedTech Evangelist) are making this App available Free-Of-Charge. If you think your colleagues may benefit from it, please feel free to share the download link. Thank you so much. CREDIT: This calculation was created by Xavier Parent, MD; for more, please see: https://pubmed.ncbi.nlm.nih.gov/19654080/.

Screenshots

Bone Age4 screens
Calcium Correction4 screens

Verdict

The call

The clearest difference is price: Calcium Correction at Free against Bone Age's $7.99. Calcium Correction also leads on rating (5.0 vs 2.3). Bone Age's advantage is update cadence (every 3 months vs every 8 months). On ratings volume, ads, in-app purchases and device support 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

Calcium Correction is free to download; Bone Age costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calcium Correction holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 5 respectively.

UpkeepUpdate frequency

Bone Age ships an update every 3 months, Calcium Correction every 8 months. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.

Scorecard4 real differences · 6 level
Bone Age versus Calcium Correction: the parameters behind the verdict, then further details
ParameterBone AgeCalcium Correction
Price$7.99Free — better
Rating2.3 (3 ratings)5.0 (5 ratings) — better
Positive reviews25.0% of reviews—
Number of ratings35 — better
Update frequencyEvery 3 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size15 MB18 MB
Age rating17+17+
DeveloperSimon ChapmanDOCTOT

Customer experience

Bone Age

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews12 reviews
Positive25.0%
Neutral8.3%
Negative66.7%

Calcium Correction

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Bone Age

No in-app purchases

None

Calcium Correction

No in-app purchases

Questions

Is Bone Age free?
Bone Age costs $7.99, with no in-app purchases.
Is Calcium Correction free?
Calcium Correction is free to download, with no in-app purchases.
Which has better reviews, Bone Age or Calcium Correction?
Calcium Correction is rated higher. Bone Age averages 2.3 out of 5 from 3 ratings, while Calcium Correction averages 5.0 from 5 ratings.
Do Bone Age or Calcium Correction have ads?
Neither Bone Age nor Calcium Correction shows ads.
Which is updated more often, Bone Age or Calcium Correction?
Bone Age ships an update every 3 months, and Calcium Correction every 8 months. Most recently, Bone Age was updated on September 10, 2026 and Calcium Correction on June 1, 2026.

Other comparisons