Comparison

UpToDate vs OB Wheels

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

Head to head
About

UpToDate

This clinical decision support tool provides healthcare professionals with evidence-based guidance to improve patient care. It features AI-powered conversational answers, continuously updated medical content, and tools for drug reference, calculations, and patient education.

Highlights
  • Expert AI conversational guidance
  • Gold standard clinical content
  • Practice-changing updates
  • Patient education materials
  • Drug reference and interactions
  • Clinical calculators
  • Kidney dosing guidance
Features
Read full description

UpToDate is the clinical decision support solution trusted by over 3M healthcare professionals to help improve care delivery and patient outcomes. Now powered by UpToDate Expert AI, a generative AI experience built on rigorously maintained UpToDate clinical intelligence to delivers fast, clinically grounded answers through a conversational interface. Expert AI, available in select packages and applications, brings together the latest evidence and real-world clinical expertise and provides transparent sourcing, embedded guardrails, and oversight, supporting clinical reasoning and helping clinicians make confident, informed decisions. Key features include: • Expert AI: Conversational guidance that mirrors how clinicians think. • Gold Standard Clinical Content: Clinician-authored clinical intelligence and graded recommendation, enriched with clinical algorithms, graphics, videos, and continuously updated to reflect the latest evidence and clinical care experience. • Practice-Changing Updates: Timely insights that reflect the latest evidence and how it impacts patient care. • Patient Education: Thousands of patient education leaflets in up to 19 different languages to improve patient understanding and support care plan adherence. • Key Points Panels: Quick, clinically actionable guidance to help clinicians avoid common diagnostic and treatment errors embedded in UpToDate search results. • Drug Reference & Interactions: Evidence-based drug monographs and interaction analysis to support safe and informed prescribing decisions. • Clinical Calculators: Over 200 tools to support dosing, risk scoring, and patient assessments. • Rx Transitions: Step-by-step support for switching antidepressants safely. • Kidney Dosing: Drug dosing guidance for patients with renal impairment. Available on mobile, desktop, and integrated into EHRs, ensuring you can access UpToDate’s trusted guidance where and when you need it. Access to features will vary depending on your UpToDate account. Expert AI is now available in personal trainee subscriptions and UpToDate Pro Plus subscriptions in the US, and through select Enterprise Edition accounts. To get access, explore personal subscription options on the UpToDate website or contact your Enterprise account lead. This app is designed for use by medical professionals. If you are not a medical professional, please consult a qualified healthcare provider before making any medical decisions.

About

OB Wheels

This app calculates due dates, gestational age, and reconciles sonogram and LMP dates using a digital OB wheel and calendar. It offers a familiar interactive wheel for precise date calculations, accounting for leap years.

Highlights
  • Calendar calculator for EDD/EDC
  • Gestational age calculation
  • Interactive digital OB wheel
  • Reconciliation of due dates
  • Leap year accuracy
Features
Read full description

Does the world need another OB-wheel-due-date-calculator app? You bet! OB Wheels combines three things that clinicians need to derive all the dates necessary in pregnancy care, and no other app has this combination. It contains a calendar calculator to determine EDD (EDC) from LMP or from a sonogram report. The calendar calculator also provides gestational age (EGA) as of any date for a given EDD or LMP. Because the calculator works off the real calendar, it is accurate for leap years too. Then for all of you who miss your cardboard OB wheel, the app contains one which you can rotate, pinch and zoom, and generally play with just like a regular cardboard wheel. It's a little tricky to learn how to plant two fingers and rotate them rather than pinch-and-zoom to get rotation versus resizing. But the wheel works and it is accurate, especially so because you can zoom in to be sure where the little date hash lines lie. Finally, the app notes the most recent committee opinion scheme from ACOG on how one might reconcile due dates from LMP and sonograms to arrive at a single final EDD. To my knowledge, the scheme is authority-based and no better or worse than other schemes, but my practice and my learners need a single clear scheme, so this app includes one for easy reference. As an educator and clinician myself, I am grateful for feedback. Email me via the contact email at my website.

Screenshots

UpToDate4 screens
OB Wheels4 screens

Verdict

The call

The clearest difference is rating: UpToDate at 3.6 against OB Wheels's 2.3. UpToDate also leads on update cadence (every 5 weeks vs every 18 months) and ratings volume (582 vs 15). OB Wheels's advantage is monetization model (free vs subscription) and iOS requirement (7.0 vs 18.0). On price, 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

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

ReceptionRating · Positive reviews · Number of ratings

UpToDate holds the better App Store score, 3.6 against 2.3. That said, the two scores are not equally well evidenced: UpToDate has 582 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 28% of UpToDate's written reviews are positive against 20% of OB Wheels's.

UpkeepUpdate frequency

UpToDate ships an update every 5 weeks, OB Wheels every 18 months. Both last shipped on October 29, 2026.

Scorecard6 real differences · 4 level
UpToDate versus OB Wheels: the parameters behind the verdict, then further details
ParameterUpToDateOB Wheels
PriceFreeFree
Rating3.6 (582 ratings) — better2.3 (15 ratings)
Positive reviews28.2% of reviews — better20.0% of reviews
Number of ratings582 — better15
Update frequencyEvery 5 weeks — betterEvery 18 months
AdsNoNo
In-app purchasesNoNo
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.07.0 — better
Further details — not scored
Size56 MB3 MB
Age rating17+17+
DeveloperUpToDate, Inc.Joshua D. steinberg

Customer experience

UpToDate

All ratings579 ratings
Positive60.4%
Neutral10.4%
Negative29.2%
Written reviews386 reviews
Positive28.2%
Neutral9.6%
Negative62.2%

OB Wheels

All ratings15 ratings
Positive20.0%
Neutral13.3%
Negative66.7%
Written reviews10 reviews
Positive20.0%
Neutral10.0%
Negative70.0%

Bugs and requests

UpToDate

Reported bugs

3 issues
  • Inability to download offline content
  • Constant need to re-authenticate
  • Incompatibility with recent iOS updates

Requested features

3 requests
  • Highlight and annotate content
  • Improved institutional login support
  • Dark mode and font size options

OB Wheels

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

UpToDate

No in-app purchases

None

OB Wheels

No in-app purchases

Questions

Is UpToDate free?
UpToDate is free to download, with no in-app purchases.
Is OB Wheels free?
OB Wheels is free to download, with no in-app purchases.
Which has better reviews, UpToDate or OB Wheels?
UpToDate is rated higher. UpToDate averages 3.6 out of 5 from 582 ratings, while OB Wheels averages 2.3 from 15 ratings.
Do UpToDate or OB Wheels have ads?
Neither UpToDate nor OB Wheels shows ads.
Which is updated more often, UpToDate or OB Wheels?
UpToDate ships an update every 5 weeks, and OB Wheels every 18 months. Most recently, UpToDate was updated on October 29, 2026 and OB Wheels on October 29, 2026.

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