NSTracker vs GDU Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NSTracker
This app allows field samplers to submit lab samples for soil, tissue, and water. It supports adding growers, farms, and fields, with geospatial mapping and access to historical data. Users can also manage favorites and customize their experience.
- Lab sample submission (soil, tissue, water)
- Grower, farm, and field management
- Geospatial boundary mapping
- Sample history and report access
- Quick resampling
- Favorites and customization
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NS Tracker is the sample submission app for the NutriScription platform. It is designed for a sampler in the field to enter the needed information for a lab. Features of the app include: - Lab sample submission for soil, tissue, & water - Adding growers, farms, and fields - Mapping geospatial boundaries - Access to sample history and reports - Quick, easy, resampling - Favorites and customization An assigned login must be created for access to this app. Contact digital.support@nutrien.com for inquiry.
GDU Calculator
This app helps corn and wheat growers calculate Growing Degree Units (GDUs) for their crops. It provides daily temperature and GDU data, and can send push notifications about potential field issues based on crop growth stages.
- Growing Degree Unit calculation
- Corn and wheat crop support
- Day-by-day temperature data
- Push notifications for field issues
- Crop growth stage tracking
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The Ag PhD GDU Calculator is a reference for corn and wheat growers to determine the amount of Growing Degree Units for their crops in the current crop season. Includes day-by-day breakdown of temperature and GDU data and has the option for push notifications informing growers of potential problems in their fields based on their crop growth stage, as calculated by the crop GDU from planting date.
Screenshots
Verdict
The clearest difference is review sentiment: NSTracker at 100% against GDU Calculator's 25%. NSTracker also leads on rating (4.3 vs 2.5). GDU Calculator's advantage is iOS requirement (13.0 vs 15.1). On price, ratings volume, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
NSTracker holds the better App Store score, 4.3 against 2.5. Both are backed by a comparable volume of ratings — 7 and 11 respectively. Written reviews point the same way: 100% of NSTracker's written reviews are positive against 25% of GDU Calculator's.
NSTracker ships an update every 2 months, GDU Calculator every 6 weeks. Both last shipped on October 23, 2026.
| Parameter | NSTracker | GDU Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (7 ratings) — better | 2.5 (11 ratings) |
| Positive reviews | 100.0% of reviews — better | 25.0% of reviews |
| Number of ratings | 7 | 11 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 67 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Nutrien AG Solutions, Inc. | Ag PhD |
Customer experience
NSTracker
GDU Calculator
In-app purchases
NSTracker
No in-app purchases
GDU Calculator
No in-app purchases
Questions
Is NSTracker free?
Is GDU Calculator free?
Which has better reviews, NSTracker or GDU Calculator?
Do NSTracker or GDU Calculator have ads?
Which is updated more often, NSTracker or GDU Calculator?
Other comparisons
