Preterm Growth Tracker vs NNI365
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Preterm Growth Tracker
This app helps parents and medical professionals monitor the growth of premature babies. It utilizes the 2025 Fenton Third-Generation Growth Charts and allows for secure sharing of progress. Options are available for tracking one or multiple children.
- Track preterm infants (20-37 weeks gestation)
- Measurements up to 67 weeks
- Family version for two children (in-app purchase)
- Professional version for unlimited children (in-app purchase)
- Print charts to iOS printers
- Email charts and data with password protection
- Email importable child profiles
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Preterm Growth Tracker is designed to help parents and medical professionals track the growth of preterm infants. The growth charts are based on the 2025 Fenton Third-Generation Growth Charts of Preterm Infants and the app has been developed in colaboration with the chart's author Tanis R. Fenton. Features include: * Tracking preterm infants with gestational age at birth from 20 weeks to 37 weeks * Tracking measurements up to 67 weeks * Family version allows tracking of two children (through in-app purchase) * Professional version allows tracking an unlimited number of childeren (through in-app purchase) * Printing chart to any iOS enabled printer * Emailing chart and data values with password protection * Emailing complete child profiles that can be imported by recipient * iPad and iPhone support
NNI365
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Get access to to resources and learning on the science of infant and maternal nutrition, the latest publications, NNI workshops, updates on upcoming conferences and events and CPD points
Screenshots
Verdict
The clearest difference is in-app purchases: NNI365 at none against Preterm Growth Tracker's 2. On price, update cadence, 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
Both are free to download. Preterm Growth Tracker sells 2 one-off in-app purchases. NNI365 asks for nothing beyond the download.
Preterm Growth Tracker ships an update every 2 months, NNI365 every 6 weeks. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.
| Parameter | Preterm Growth Tracker | NNI365 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 73 MB |
| Age rating | +4 | 17+ |
| Developer | Quatrian Inc. | Nestlé |
In-app purchases
Preterm Growth Tracker
- Family version$6.99
- Professional version$35.99
NNI365
No in-app purchases
Questions
Is Preterm Growth Tracker free?
Is NNI365 free?
Do Preterm Growth Tracker or NNI365 have ads?
Which is updated more often, Preterm Growth Tracker or NNI365?
Other comparisons
