Comparison

Evidencio vs Obstetrics Calculator

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

Head to head
About

Evidencio

Features
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With the Evidencio App you can quickly access and use medical prediction models and calculators from Evidencio.com. Evidencio.com hosts the world's first open and transparent library of online medical prediction models and calculators, created by and for medical professionals and researchers. The Evidencio App allows guest users to navigate and use all public models available from Evidencio.com. Registered users can configure favorite models for quick access. As a registered user you're also able to create your own models on Evidencio.com and subsequently use them as private or privately shared models in the App.

About

Obstetrics Calculator

This medical app provides a comprehensive suite of tools for calculating gestational age, estimated due dates, and various risk assessments related to pregnancy and women's health. It includes calculators for maternity leave, cervical assessments, and cancer risk estimations, designed for healthcare professionals.

Highlights
  • Gestational age and due date calculation
  • Multiple calculation methods (LMP, ultrasound, IVF)
  • Maternity leave timeframe estimation
  • Bishop Score and TOLAC probability
  • Cancer risk estimations (Breast, Cervical, Ovarian)
  • Follow-up after colposcopy
Features
Read full description

Obstetric Calculator will help you determine gestational age in weeks and days as well as estimated due date using last menstrual period, ultrasound report, ovulation/IVF and other methods. This set of tools ans scales contains: - Estimated Due Date & Gestational Age by First Day of Last Menstrual Period - Estimated Due Date & Gestational Age by Ultrasound Report - Estimated Due Date & Gestational Age by Conception Date - Estimated Due Date & Gestational Age by Quickening (= Fetal Movements) - Estimated Due Date & Gestational Age from Given Date - Timeframe for Maternity Leave - Gestational Age & last menstrual period from Estimated Due Date - Gestational Age by Crown-Rump Length - Gestational Age by Fetal Biometry - Estimated Fetal Weight by Mother's Biometry - Bishop Score (Quick Cervix Assessment) - Probability of Successful Vaginal Birth after Cesarean Section (or Trial of Labor) - Breast Cancer Risk Estimation (Gail Model) - Cervical Cancer Risk Estimation (ASCCP 2019 Guidelines) - Ovarian Cancer Risk (O-RADS, ADNEX, ROMA) - Follow-Up after Colposcopy/Treatment of CIN Each tool is provided with instructions ("i" in the upper right corner). This app was designed for educational use by health care providers in the field of Obstetrics & Gynecology.

Screenshots

Evidencio4 screens
Obstetrics Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Evidencio at none against Obstetrics Calculator's 2. Evidencio also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Obstetrics Calculator sells 2 in-app purchases, starting at $1.99 per month. Evidencio asks for nothing beyond the download.

UpkeepUpdate frequency

Evidencio ships an update every 5 weeks, Obstetrics Calculator every 2 months. Both last shipped on November 11, 2026.

Scorecard2 real differences · 8 level
Evidencio versus Obstetrics Calculator: the parameters behind the verdict, then further details
ParameterEvidencioObstetrics Calculator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—54.5% of reviews
Number of ratings—1 — better
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size15 MB90 MB
Age rating17+12+
DeveloperEvidencio B.V.Alexander Snegirev

In-app purchases

None

Evidencio

No in-app purchases

2 purchases

Obstetrics Calculator

Subscriptions1
  • ObCalc Pro$1.991 Month
One-time1
  • Disable Ads$10.99

Questions

Is Evidencio free?
Evidencio is free to download, with no in-app purchases.
Is Obstetrics Calculator free?
Obstetrics Calculator is free to download, with in-app purchases available.
Do Evidencio or Obstetrics Calculator have ads?
Obstetrics Calculator shows ads; Evidencio does not.
Which is updated more often, Evidencio or Obstetrics Calculator?
Evidencio ships an update every 5 weeks, and Obstetrics Calculator every 2 months. Most recently, Evidencio was updated on November 11, 2026 and Obstetrics Calculator on November 11, 2026.

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