Soil Sensor Calculator vs Dyna
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Soil Sensor Calculator
This tool helps users calculate irrigation needs based on Watermark sensor readings. It determines average centibar readings, available water, stress levels, and irrigation requirements, factoring in soil type and growth stage.
- Enter Watermark sensor readings
- Calculate average centibar reading
- Determine available water remaining
- Assess soil stress level
- Calculate days to irrigation
- Estimate water required for irrigation
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The calculator allows for the user to enter readings from Watermark brand sensors. The user enters the readings for the rooting depth, the effective rooting depth for the stage of growth, the soil type and the Managed Allowable Depletion (MAD). The app calculates the average centibar reading for the provided values, the available water remaining and provides the stress level. Days to required irrigation can then be easily determined. How much water is required for last irrigation is also calculated and adjusted for irrigation efficiency.
Dyna
This app helps calculate seeding rates, calibrate rice drills, and determine seed spacing for agricultural purposes. It provides essential tools for efficient crop planting and management.
- Seeding rate calculation
- Rice drill calibration
- Seed spacing calculation
- Agricultural planting tools
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Dyna-Gro Seed app enables you to calculate the seeding rate, rice drill Calibration, and seed spacing.
Screenshots
Verdict
The clearest difference is update cadence: Soil Sensor Calculator at every 5 months against Dyna's every 9 months. Soil Sensor Calculator also leads on ratings volume (6 vs 2). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 5.0 for Soil Sensor Calculator against 5.0 for Dyna. Both are backed by a comparable volume of ratings — 6 and 2 respectively.
Soil Sensor Calculator ships an update every 5 months, Dyna every 9 months. The most recent releases landed on June 1, 2026 and June 11, 2026 respectively.
| Parameter | Soil Sensor Calculator | Dyna |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) | 5.0 (2 ratings) |
| Number of ratings | 6 — better | 2 |
| Update frequency | Every 5 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 9 MB | 15 MB |
| Age rating | 4+ | 17+ |
| Developer | Chris Henry | Nutrien AG Solutions, Inc. |
Customer experience
Soil Sensor Calculator
Dyna
In-app purchases
Soil Sensor Calculator
No in-app purchases
Dyna
No in-app purchases
