# Preterm Growth Tracker vs NNI365

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.

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.

## The numbers

| Metric | Preterm Growth Tracker | NNI365 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/preterm-growth-tracker/id950728483/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 73 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 17+ |
| Developer | [Quatrian Inc.](https://appshunter.io/developer/404828595) | [Nestlé](https://appshunter.io/developer/451455699) |

## What reviewers say

### Preterm Growth Tracker

[App page](https://appshunter.io/ios/app/preterm-growth-tracker/id950728483)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Family version | $6.99 | one-time |
| Professional version | $35.99 | one-time |


### NNI365

[App page](https://appshunter.io/ios/app/nni365/id6475768335)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Preterm Growth Tracker free?

Preterm Growth Tracker is free to download, with in-app purchases available.

### Is NNI365 free?

NNI365 is free to download, with no in-app purchases.

### Do Preterm Growth Tracker or NNI365 have ads?

Neither Preterm Growth Tracker nor NNI365 shows ads.

### Which is updated more often, Preterm Growth Tracker or NNI365?

Preterm Growth Tracker ships an update every 2 months, and NNI365 every 6 weeks. Most recently, Preterm Growth Tracker was updated on October 13, 2026 and NNI365 on October 17, 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.*