Comparison

CALIPER App vs The Perinatal Memo

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

Head to head
About

CALIPER App

This app helps healthcare professionals and parents compare a child's lab test results against a comprehensive, up-to-date database of normal values. It simplifies the assessment of pediatric laboratory data, aiding in the identification of potential health concerns and treatment adjustments.

Highlights
  • Pediatric lab test comparison
  • Up-to-date reference value database
  • Supports over 100 routine tests
  • User-friendly interface
  • Portable on-the-go tool
  • Validated and published data
Read full description

The CALIPER App has been developed for paediatricians, family physicians, other healthcare workers, as well as parents worldwide. It is a user friendly and easy tool to assess a child’s laboratory test results using the latest reference value database developed based on values in healthy children and adolescents. Quickly and easily compare individual laboratory test results to a database of normal values (reference intervals) covering more than 100 tests routinely performed to assess children with various medical concerns. The CALIPER database has been validated and published in international medical journals and accepted worldwide as the most up to date reference resource available anywhere. Reference intervals represent the range of values that healthy, normal individuals are expected to display for various laboratory tests. When a patient’s results fall outside of this expected range, this alerts physicians and laboratory professionals to the need for follow-up testing and can signal that changes to treatment or monitoring are required. The reference intervals included in this application were determined as part of the Canadian Laboratory Initiative for Pediatric Reference Intervals (CALIPER) at the Hospital for Sick Children, an ongoing nation-wide study of normal values in paediatric lab results. Until recently, only outdated or inaccurate values were available for many paediatric lab tests. CALIPER provides reference intervals that reflect the influence of the rapid developmental and hormonal changes occurring during childhood. All reference intervals reported here were developed using the most up-to-date laboratory testing equipment available from Abbott Diagnostics. To use the app, simply select the test of interest, enter an individual’s results, and select their sex and age from the drop-down menu. An output will display how these results relate to CALIPER reference database, allowing for efficient and easy comparison. With your phone at hand, you will never be without this simple, portable tool for evaluating lab tests results on the go. For a complete list of tests available as part of this application, or for additional support, please visit the CALIPER website.

About

The Perinatal Memo

A quick reference guide for healthcare professionals on Canadian perinatal care recommendations and practice guidelines. It covers evidence-based information for pregnant women, childbirth, and newborns.

Highlights
  • Canadian perinatal care guidelines
  • Evidence-based recommendations
  • Covers pregnancy, childbirth, and newborns
  • Quick reference for professionals
  • Designed for family physicians, midwives, nurses
Features
Read full description

Written by practicing family physicians and educators, this quick reference book is intended for family doctors involved in prenatal care or deliveries, as well as midwives, nurses, and other professionals in the field of perinatal care. It is also useful for students and trainees in these disciplines. This application aims to provide a summary of the main evidence-based Canadian recommendations and practice guidelines in the field of perinatal care, including care for pregnant women, childbirth, and newborns. Disclaimer: This document is intended for healthcare professionals and is not designed to provide information to the general population regarding perinatal care. If you are pregnant and experiencing a problem or complication, please consult your healthcare professional. Privacy Policy: https://memoperinatalite.ca/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CALIPER App4 screens
The Perinatal Memo4 screens

Verdict

The call

The clearest difference is price: CALIPER App at Free against The Perinatal Memo's $39.99. CALIPER App also leads on in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.1). The Perinatal Memo's advantage is update cadence (every 2 months vs every 16 months). On review sentiment, ads 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

CALIPER App is free to download; The Perinatal Memo costs $39.99 up front. The Perinatal Memo sells 1 in-app purchase, starting at $19.99 per year. CALIPER App asks for nothing beyond the download.

UpkeepUpdate frequency

CALIPER App ships an update every 16 months, The Perinatal Memo every 2 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard5 real differences · 5 level
CALIPER App versus The Perinatal Memo: the parameters behind the verdict, then further details
ParameterCALIPER AppThe Perinatal Memo
PriceFree — better$39.99
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 16 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size26 MB112 MB
Age rating4+17+
DeveloperThe Hospital for Sick ChildrenLes Editions Memos S.E.N.C.

Customer experience

CALIPER App

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

The Perinatal Memo

Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CALIPER App

No in-app purchases

1 purchases

The Perinatal Memo

Subscriptions1
  • Abonnement au contenu1 Year trial$19.991 Year

Questions

Is CALIPER App free?
CALIPER App is free to download, with no in-app purchases.
Is The Perinatal Memo free?
The Perinatal Memo costs $39.99, and also offers in-app purchases.
Do CALIPER App or The Perinatal Memo have ads?
Neither CALIPER App nor The Perinatal Memo shows ads.
Which is updated more often, CALIPER App or The Perinatal Memo?
CALIPER App ships an update every 16 months, and The Perinatal Memo every 2 months. Most recently, CALIPER App was updated on October 24, 2026 and The Perinatal Memo on October 29, 2026.

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