# SURF vs The Perinatal Memo

The clearest difference is price: SURF at Free against The Perinatal Memo's $39.99. The Perinatal Memo's advantage is review sentiment (100% vs 67%) and update cadence (every 2 months vs every 5 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

SURF is free to download; The Perinatal Memo costs $39.99 up front. SURF sells 1 in-app purchase, starting at $99.99 per year and The Perinatal Memo sells 1 in-app purchase, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

SURF ships an update every 5 months, The Perinatal Memo every 2 months. Both last shipped on September 22, 2026.

## The numbers

| Metric | SURF | The Perinatal Memo |
| --- | --- | --- |
| Price | **Free** | $39.99 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Subscription | **Paid** |
| Size | 204 MB | 112 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Philippe FURGER](https://appshunter.io/developer/1055742280) | [Les Editions Memos S.E.N.C.](https://appshunter.io/developer/1551841087) |

## What reviewers say

### SURF

[App page](https://appshunter.io/ios/app/surf/id1055743301)

Access evidence-based medical content for internal medicine, differential diagnosis, and lab values. This comprehensive guide is designed for residents, general practitioners, and specialists, offering a vast amount of information from multiple expert-authored books.

**Highlights:** Evidence-based medical content, Differential diagnosis of symptoms, Lab value interpretation, Comprehensive internal medicine, Links to external calculators, Accessible on multiple devices

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 year | $99.99 | per year |


### 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 SURF free?

SURF is free to download, with in-app purchases available.

### Is The Perinatal Memo free?

The Perinatal Memo costs $39.99, and also offers in-app purchases.

### Do SURF or The Perinatal Memo have ads?

Neither SURF nor The Perinatal Memo shows ads.

### Which is updated more often, SURF or The Perinatal Memo?

SURF ships an update every 5 months, and The Perinatal Memo every 2 months. Most recently, SURF was updated on September 22, 2026 and The Perinatal Memo on September 22, 2026.

---

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