Obstetrics Calculator: iPhone vs Android
Obstetrics Calculator gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
Obstetrics Calculator by Alexander Snegirev is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Rating
4.7 ★
1.1k ratings, both stores
Measured
Best rank now
#50
iPhone · 
Medical Grossing
Medical GrossingMeasured
App Store
App details
App ID
1564764019
Publisher
Alexander Snegirev
Publisher country
602332
On the store since
Apr 2021
5 years on the store
Minimum OS
iOS 13.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
12+
1 content note below
Languages
6
EN FR DE IT RU ES
Size
95 MB
Also listed in
Reference
Content notesInfrequent/Mild Medical/Treatment Information
Google Play
App details
App ID
com.Alefrei.ObstetricCalculator
Publisher
Александр Владимирович Снегирёв
Publisher country
602332
Content rating
Everyone
Obstetrics Calculator downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | 50+ | 10k+ |
| Google Play | 500+ | 1M+ Measured |
| Total | 500+ Confidence | 1M+ Confidence |
How this is calculated
iPhone: chart positions and rating growth per country, anchored on its own Android downloads; lifetime from ratings worldwide × installs per rating. Google Play: the daily change in its exact install count. The total adds every store.
Where Obstetrics Calculator's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend before Apple and Google take their fee.
| Store | Per day | Per month | Share |
|---|---|---|---|
| App Store | |||
| Google Play | |||
| Total | Confidence | 100% |
Business model: In-app purchase-led
How Obstetrics Calculator makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 105 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 5.0 ★ | 3 |
| Google Play | 4.7 ★ | 1.1k 4 written reviews |
| Both stores | 4.7 ★ weighted by ratings | 1.1k |
About Obstetrics Calculator
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.
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.
Obstetrics Calculator iPhone
Obstetrics Calculator gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
Obstetrics Calculator is #50 in Medical Grossing in Russia and charting in 2 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperAlexander Snegirev
CategoryMedical
PriceFree
Released
Rating★ 5.0 (3)
Version5.2
Age rating12+
First seen by us 24 Sep 2026
24 Sep 2026Installs (est.)10k+ worldwide
Rating
5.0 ★
3 ratings
Measured
Best rank now
#50
Medical GrossingMeasured
Obstetrics Calculator on the App Store
App details
App ID
1564764019
Publisher
Alexander Snegirev
Publisher country
602332
On the store since
Apr 2021
5 years on the store
Minimum OS
iOS 13.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
12+
1 content note below
Languages
6
EN FR DE IT RU ES
Size
95 MB
Also listed in
Reference
Content notesInfrequent/Mild Medical/Treatment Information
Obstetrics Calculator downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Obstetrics Calculator's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Obstetrics Calculator before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Obstetrics Calculator makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 105 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Russia | MedicalGrossing | #50 |
 India | MedicalGrossing | #83 |
Apps near Obstetrics Calculator on the chart
Medical Grossing, around #50.
Ratings
App Store, worldwide.
Rating
5.0 ★
3 ratings
Measured
Ratings
3
Measured
About Obstetrics Calculator
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.
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.
Latest updates
5.2
Obstetric Calculator Android
Obstetric Calculator gets 500+ downloads a day worldwide (AppInsider estimate, October 2026, rounded down to a band).
Obstetric Calculator is #50 in Medical Free on Google Play in Mexico and charting in 2 of 23 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
DeveloperAlexander Snegirev
CategoryMedical
PriceFree
Released
Installs1M+
Rating★ 4.7 (1.1k)
Updated
Content ratingEveryone
Rating
4.7 ★
1.1k ratings
Measured
Best rank now
#50
Medical FreeMeasured
Obstetric Calculator on Google Play
App details
App ID
com.Alefrei.ObstetricCalculator
Publisher
Александр Владимирович Снегирёв
Publisher country
602332
Content rating
Everyone
Obstetric Calculator downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Where Obstetric Calculator's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in Obstetric Calculator before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: In-app purchase-led
How Obstetric Calculator makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds · 105 ad networks
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Mexico | MedicalFree | #50 |
 United Arab Emirates | MedicalFree | #160 |
Apps near Obstetric Calculator on the chart
Medical Free, around #50.
Ratings
Google Play, worldwide.
Rating
4.7 ★
1.1k ratings
Measured
Ratings
1.1k
Measured
Written reviews
4
Measured
About Obstetric Calculator
Comprehensive Obstetric & Gynecology Toolkit for Healthcare Professionals
Obstetric Calculator (also known as Obstetrical Wheel) helps determine gestational age in weeks and days, as well as estimate due dates using methods like the last menstrual period, ultrasound reports, ovulation/IVF, and more.
This app offers over 10 essential ObGyn tools, making it an invaluable resource for obstetricians, gynecologists, midwives, and other healthcare providers. It can also be used by patients for educational purposes.
Key Features:
- Estimated Due Date (EDD) & Gestational Age (GA) by First Day of Last Menstrual Period (LMP)
- EDD & GA by Ultrasound Report
- EDD & GA by Conception Date
- EDD & GA by Fetal Movements
- EDD & GA from Given Date
- GA & LMP from Estimated Delivery Date
- GA by Crown-Rump Length (CRL)
- GA by Fetal Biometry
- Fetal Growth and Doppler
- Estimated Fetal Weight by Mother's Biometry
- Bishop Score (Quick Cervix Assessment)
- Probability of Successful Vaginal Birth after Cesarean Section (VBAC/TOLAC)
- Breast Cancer Risk Estimation
- Cervical Cancer Risk Estimation
Each tool includes detailed instructions accessible via the "i" button in the upper right corner.
This app is designed for educational use by healthcare providers in Obstetrics & Gynecology, but its intuitive interface allows patients to use it for educational purposes as well.
Why Use Obstetric Calculator?
- Accurate Calculations: Rely on precise algorithms for gestational age and due date calculations.
- Comprehensive Tools: All essential ObGyn tools in one place for quick and easy access.
- User-Friendly Interface: Simple navigation and clear instructions make the app easy to use.
- Educational Value: Ideal for both professionals and patients looking to understand their pregnancy better.
Enhance your practice with all-in-one ObGyn toolkit. Download now to streamline your obstetric and gynecological assessments!
Obstetric Calculator (also known as Obstetrical Wheel) helps determine gestational age in weeks and days, as well as estimate due dates using methods like the last menstrual period, ultrasound reports, ovulation/IVF, and more.
This app offers over 10 essential ObGyn tools, making it an invaluable resource for obstetricians, gynecologists, midwives, and other healthcare providers. It can also be used by patients for educational purposes.
Key Features:
- Estimated Due Date (EDD) & Gestational Age (GA) by First Day of Last Menstrual Period (LMP)
- EDD & GA by Ultrasound Report
- EDD & GA by Conception Date
- EDD & GA by Fetal Movements
- EDD & GA from Given Date
- GA & LMP from Estimated Delivery Date
- GA by Crown-Rump Length (CRL)
- GA by Fetal Biometry
- Fetal Growth and Doppler
- Estimated Fetal Weight by Mother's Biometry
- Bishop Score (Quick Cervix Assessment)
- Probability of Successful Vaginal Birth after Cesarean Section (VBAC/TOLAC)
- Breast Cancer Risk Estimation
- Cervical Cancer Risk Estimation
Each tool includes detailed instructions accessible via the "i" button in the upper right corner.
This app is designed for educational use by healthcare providers in Obstetrics & Gynecology, but its intuitive interface allows patients to use it for educational purposes as well.
Why Use Obstetric Calculator?
- Accurate Calculations: Rely on precise algorithms for gestational age and due date calculations.
- Comprehensive Tools: All essential ObGyn tools in one place for quick and easy access.
- User-Friendly Interface: Simple navigation and clear instructions make the app easy to use.
- Educational Value: Ideal for both professionals and patients looking to understand their pregnancy better.
Enhance your practice with all-in-one ObGyn toolkit. Download now to streamline your obstetric and gynecological assessments!
What's new in 5.0.4
- minor UI improvements