Comparison

PRN Graph vs Trauma.nl (NVT)

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

Head to head
About

PRN Graph

Features
Read full description

The Perined-Hoftiezer birth weight curves show the optimal birth weight (and its distribution) of children born at the corresponding gestational age. The curves are differentiated by gender. Identifying small children is important for reducing mortality and morbidity. These curves are based on data from the perinatal registration of newborns in the Netherlands. The curves are normative and therefore developed based on a low-risk population without known risk factors for fetal growth restriction. All multiple pregnancies, inductions, and primary cesarean sections were also excluded to approximate the optimal birth weight for each gestational age. More information can be found at www.perined.nl and in the following scientific publications: Hoftiezer L et al. Am J Obstet Gynecol. (2019) From population reference to national standard: new and improved birthweight charts. 10.1016/j.ajog.2018.12.023 Hoftiezer L et al. Eur J Pediatr. (2016) Defining small-for-gestational-age: prescriptive versus descriptive birthweight standards. 10.1007/s00431-016-2740-8 The curves were compiled by Liset Hoftiezer, guided by a working group consisting of representatives from various professional groups, birth care organizations, and researchers: Joyce Dijs-Elsinga, Jeroen van Dillen, Michel Hof, Marije Hogeveen, Chantal Hukkelhoven, Karline van de Kamp, Richard van Lingen, Alieke de Roon-Immerzeel, Rosalinde Snijders, Viki Verfaille, Ger de Winter, and Koos Zwinderman. The research position was financially supported by the Isala Innovation & Science Fund and Nutricia Early Life Nutrition; there has been no interference with the content of the project. ยฉ 2024 Perined

About

Trauma.nl (NVT)

Features
Read full description

De belangrijkste missie van de Nederlandse Vereniging voor Traumachirurgie is het bevorderen van de kwaliteit van zorg voor ongeval slachtoffers in Nederland. Hiervoor is nu deze app beschikbaar gemaakt met informatie voor leden en andere vakgenoten. De app bevat onder andere informatie over de vereniging (NVT) de evenementen (STN) en een apart protocollen gedeelte.

Screenshots

PRN Graph4 screens
Trauma.nl (NVT)3 screens

Verdict

The call

The clearest difference is update cadence: PRN Graph at every 3 months against Trauma.nl (NVT)'s every 23 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PRN Graph ships an update every 3 months, Trauma.nl (NVT) every 23 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

Scorecard1 real difference ยท 5 level
PRN Graph versus Trauma.nl (NVT): the parameters behind the verdict, then further details
ParameterPRN GraphTrauma.nl (NVT)
PriceFreeFree
Update frequencyEvery 3 months โ€” betterEvery 23 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS16.016.0
Further details โ€” not scored
Size6 MB88 MB
Age rating17+17+
DeveloperGlamorous Goat B.V.MEDonline International B.V.

In-app purchases

None

PRN Graph

No in-app purchases

None

Trauma.nl (NVT)

No in-app purchases

Questions

Is PRN Graph free?
PRN Graph is free to download, with no in-app purchases.
Is Trauma.nl (NVT) free?
Trauma.nl (NVT) is free to download, with no in-app purchases.
Do PRN Graph or Trauma.nl (NVT) have ads?
Neither PRN Graph nor Trauma.nl (NVT) shows ads.
Which is updated more often, PRN Graph or Trauma.nl (NVT)?
PRN Graph ships an update every 3 months, and Trauma.nl (NVT) every 23 months. Most recently, PRN Graph was updated on September 8, 2026 and Trauma.nl (NVT) on September 9, 2026.

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