Comparison

MDCalc Medical Calculator vs Constipation Diary

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

Head to head
About

MDCalc Medical Calculator

This app provides over 900 evidence-based medical calculators, risk scores, and clinical tools for healthcare professionals. It offers offline functionality, expert insights, and CME tracking to support patient care at the bedside. Tools are developed and validated by board-certified physicians.

Highlights
  • 900+ evidence-based calculators
  • Offline functionality
  • Expert insights and commentary
  • CME tracking
  • Smart search and organization
  • Point-of-care workflow support
Features
Currently charting
Read full description

MDCalc is the leading clinical decision support app providing 900+ evidence-based calculators, risk scores, and clinical tools to support patient care at the bedside. MDCalc has been trusted by millions of clinicians since 2005. Why Clinicians Choose MDCalc: • Created by Physicians, for Physicians - All tools developed and validated by board-certified physicians • 900+ Clinical Tools - Risk scores, algorithms, dosing calculators, and more with consistent updates and new tools added regularly • Works Offline - Full functionality without internet connection • Evidence-Based - Every tool includes research validation and expert commentary • CME Tracking - Earn CME just by reading through the clinical content surrounding many of our tools • Free Registration - Complete access in under 30 seconds Key Features: Smart Search & Organization • Quick search across all tools • Customizable favorites and specialty lists • Recently used tools for quick access • Auto-sync between web and mobile • Explore page for personalized suggestions Clinical Expertise • Expert insights from creators • Pearls & pitfalls from specialists • Evidence summaries with PubMed links • Error warnings and normal value ranges Workflow Support • Toggle between US and SI units instantly • Works in limited connectivity settings • Easy to use at the point-of-care Popular Tools Include: • Creatinine Clearance - Cockcroft-Gault Equation • HA2DS2-VASc Score - Atrial Fibrillation Stroke Risk • HEART Score- Major Cardiac Events • Wells' Criteria - Pulmonary Embolism & DVT • MELD Score - End-Stage Liver Disease • HAS-BLED Score - Major Bleeding Risk • SIRS/Sepsis Criteria - Septic Shock Assessment • Mean Arterial Pressure - Hemodynamic Monitoring MDCalc ensures only the highest-quality, clinically relevant tools make it into the app. Each calculator undergoes rigorous evidence appraisal and validation by our network of academic and practicing physician experts.

About

Constipation Diary

This app helps individuals track daily bowel movements and related symptoms to better understand and manage constipation. It's designed for prospective assessment in clinical trials and for personal health management.

Highlights
  • Daily symptom tracking
  • Bowel movement frequency
  • Stooling habit recording
  • Constipation assessment
  • Clinical trial data collection
  • Patient-reported outcomes
Features
Read full description

©NEUROGUT 2018 CONSTIPATION STOOL INSTRUMENT Basic description: The Constipation Stool Instrument (CSI) is a list of patient-reported symptoms for the evaluation of bowel problems associated with constipation. Constipation affects 15% of the US population. Constipation comprises of multiple symptoms that describe the frequency and difficulty with bowel movements. Because of the irregular nature of bowel habit, the multiple and variable symptoms, and difficulty with remembering symptoms as well as recall bias, it is important to prospectively assess patient-reported bowel symptoms, for use in clinical trials, and for the assessment of patients with constipation. Authors: Neurogut Incorporated (USA) Objective: To assess the presence of and severity of patient-reported bowel and abdominal symptoms related to constipation, for use in clinical trials, and assessment of patients with constipation Therapeutic Areas: Gastrointestinal and Digestive System Diseases Pathological conditions, Signs and Symptoms Therapeutic indication: Constipation Dyssynergic defecation Anorectal and Colorectal diseases Type of Clinical Outcome Assessment (COA) Patient Reported Outcome (PRO) assessment Original language English for the USA Bibliographic reference for the original questionnaire: Meduri K, Brown CK, Attaluri A, Valestin J, Rao SSC. Validation of a Prospective Stool Diary for Assessment of Constipation. Neurogastroenterol Motil 2011; 23 (Supplement 1): 21. Administration: The Constipation Stool Instrument (CSI) is a daily, self-administered questionnaire for the assessment of bowel habit. The subject is instructed to fill out all 11 items for one day by responding on each screen presented, and as it relates to each bowel movement. It takes 1 minute to complete this App for each bowel movement. Purpose of survey: To accurately and more completely record each subject’s bowel and stooling habit To better understand the subject’s constipation problem To use the information to improve the health of a patient with constipation Benefits to the Respondent: To improve diagnosis of constipation and to identify the subject’s subtype of constipation To help develop appropriate treatment plan To help develop new treatments

Screenshots

MDCalc Medical Calculator4 screens
Constipation Diary4 screens

Verdict

The call

The clearest difference is review sentiment: MDCalc Medical Calculator at 72% against Constipation Diary's 17%. MDCalc Medical Calculator also leads on rating (4.9 vs 2.3) and ratings volume (52K vs 7). Constipation Diary's advantage is iOS requirement (13.0 vs 15.1). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

MDCalc Medical Calculator holds the better App Store score, 4.9 against 2.3. That said, the two scores are not equally well evidenced: MDCalc Medical Calculator has 52K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 72% of MDCalc Medical Calculator's written reviews are positive against 17% of Constipation Diary's.

UpkeepUpdate frequency

MDCalc Medical Calculator ships an update every 3 weeks, Constipation Diary every 2 months. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 5 level
MDCalc Medical Calculator versus Constipation Diary: the parameters behind the verdict, then further details
ParameterMDCalc Medical CalculatorConstipation Diary
PriceFreeFree
Rating4.9 (52K ratings) — better2.3 (7 ratings)
Positive reviews71.5% of reviews — better16.7% of reviews
Number of ratings52K — better7
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#150 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size68 MB11 MB
Age rating17+17+
DeveloperMD Aware, LLCAmalesh Sanku

Customer experience

MDCalc Medical Calculator

All ratings52,002 ratings
Positive98.7%
Neutral0.8%
Negative0.4%
Written reviews200 reviews
Positive71.5%
Neutral6.5%
Negative22.0%

Constipation Diary

All ratings7 ratings
Positive28.6%
Neutral0.0%
Negative71.4%
Written reviews6 reviews
Positive16.7%
Neutral0.0%
Negative83.3%

Bugs and requests

MDCalc Medical Calculator

Reported bugs

3 issues
  • App crashes on launch after recent updates
  • Unable to access app after mandatory login requirement
  • Keyboard issues and difficulty navigating form fields

Requested features

4 requests
  • Add support for gestures and keyboard shortcuts
  • Allow users to set Favorites as the default view
  • Improve compatibility with iPad and Mac devices
  • Expand registration options for international users

Constipation Diary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

MDCalc Medical Calculator

No in-app purchases

None

Constipation Diary

No in-app purchases

Questions

Is MDCalc Medical Calculator free?
MDCalc Medical Calculator is free to download, with no in-app purchases.
Is Constipation Diary free?
Constipation Diary is free to download, with no in-app purchases.
Which has better reviews, MDCalc Medical Calculator or Constipation Diary?
MDCalc Medical Calculator is rated higher. MDCalc Medical Calculator averages 4.9 out of 5 from 52K ratings, while Constipation Diary averages 2.3 from 7 ratings.
Do MDCalc Medical Calculator or Constipation Diary have ads?
Neither MDCalc Medical Calculator nor Constipation Diary shows ads.
Which is updated more often, MDCalc Medical Calculator or Constipation Diary?
MDCalc Medical Calculator ships an update every 3 weeks, and Constipation Diary every 2 months. Most recently, MDCalc Medical Calculator was updated on October 21, 2026 and Constipation Diary on October 14, 2026.

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