Comparison

Perinatal Calculators vs PlexusMD Viewer

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

Head to head
About

Perinatal Calculators

This app provides essential obstetrical and perinatal calculators for healthcare providers. It aids in patient counseling with tools for assessing risks like extreme prematurity and Down Syndrome, and managing conditions like gestational diabetes. All calculations are performed locally without an internet connection.

Highlights
  • Extreme prematurity calculator
  • VBAC success calculators
  • Down Syndrome risk assessment
  • Gestational diabetes insulin calculation
  • CCAMs CVR calculator
  • Offline functionality
Features
Read full description

Perinatal and obstetrical calculators derived from published data to help guide obstetrical providers in counseling patients. Calculators include: -Extreme prematurity calculator for fetuses 22-25 weeks gestational age -VBAC success calculator based on information available for counseling in the office setting -VBAC success calculator based on factors on admission including cervical exam -Assessment of risk of having a child with Down Syndrome -Insulin calculation for initiating insulin in a gestational diabetic -CVR calculator for CCAMs -MCA doppler MOM calculator -Umbilical artery doppler reference range calculator -Preterm VBAC calculator -Insulin adjustment for corticosteroids calculator DOES NOT REQUIRE INTERNET CONNECTION to use, all done locally on iPhone or iPad

About

PlexusMD Viewer

Read full description

PlexusMD Viewer is a fast, private DICOM viewer for iPhone and iPad, built by a radiologist for physicians who need to look at a study away from the workstation. YOUR LIBRARY • Open DICOM files, whole folders from a patient CD, or zip archives, from Files, AirDrop, Mail or any app • Studies stay in a library on your device, protected while it is locked • Rename studies, keep only the series you need, and anonymize cases for teaching • Anonymized studies sync to your other devices with iCloud READ LIKE AT THE WORKSTATION • Multiplanar reconstruction (MPR) with MIP, MinIP and average slabs • Up to four panes with reference lines and linked scrolling; compare with a prior study • Window/level by touch, CT presets, invert, zoom and pan • Cine playback with adjustable speed • Acquisition time on every image and a full DICOM tag viewer • PET with SUV, MIP and a hot colour scale • Compressed studies: JPEG, JPEG Lossless, JPEG 2000 and RLE MEASURE AND ANNOTATE • Length, angle, Cobb angle, ellipse, rectangle and freehand ROI (mean, SD, min, max, area) • HU probe, arrows, text notes, magnifier and calibration for plain films • Key images; measurements are kept with the study SHARE SAFELY • Share chosen series by link or email; patient details are removed on your device first • Links work for 120 minutes and can be removed at any time • Save a study someone shared with you to your own library • Export an anonymized zip or an image PRIVATE BY DESIGN • No account, no ads, no tracking • Images are processed on your device; nothing is uploaded unless you share a study by link • Studies with patient details never go to iCloud PlexusMD Viewer is a viewing and reference tool. It is not a medical device and is not intended for diagnosis.

Screenshots

Perinatal Calculators3 screens
PlexusMD Viewer4 screens

Verdict

The call

The clearest difference is update cadence: PlexusMD Viewer at every 2 days against Perinatal Calculators's monthly. Perinatal Calculators's advantage is iOS requirement (15.6 vs 17.0). 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.

UpkeepUpdate frequency

Perinatal Calculators ships an update monthly, PlexusMD Viewer every 2 days. The most recent releases landed on September 24, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 7 level
Perinatal Calculators versus PlexusMD Viewer: the parameters behind the verdict, then further details
ParameterPerinatal CalculatorsPlexusMD Viewer
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size2 MB3 MB
Age rating4+4+
DeveloperDavid DeschampsDermatological Beauty LLC

In-app purchases

None

Perinatal Calculators

No in-app purchases

None

PlexusMD Viewer

No in-app purchases

Questions

Is Perinatal Calculators free?
Perinatal Calculators is free to download, with no in-app purchases.
Is PlexusMD Viewer free?
PlexusMD Viewer is free to download, with no in-app purchases.
Do Perinatal Calculators or PlexusMD Viewer have ads?
Neither Perinatal Calculators nor PlexusMD Viewer shows ads.
Which is updated more often, Perinatal Calculators or PlexusMD Viewer?
Perinatal Calculators ships an update monthly, and PlexusMD Viewer every 2 days. Most recently, Perinatal Calculators was updated on September 24, 2026 and PlexusMD Viewer on October 11, 2026.

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