# CALIPER App vs The Perinatal Memo

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.

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.

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.

## The numbers

| Metric | CALIPER App | The Perinatal Memo |
| --- | --- | --- |
| Price | **Free** | $39.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caliper-app/id849920476/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 26 MB | 112 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [The Hospital for Sick Children](https://appshunter.io/developer/444728983) | [Les Editions Memos S.E.N.C.](https://appshunter.io/developer/1551841087) |

## What reviewers say

### CALIPER App

[App page](https://appshunter.io/ios/app/caliper-app/id849920476)

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

**In-app purchases:** none


### The Perinatal Memo

[App page](https://appshunter.io/ios/app/the-perinatal-memo/id1551840935)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Abonnement au contenu | $19.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*