# Soil Sensor Calculator vs Dyna

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.

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.

## The numbers

| Metric | Soil Sensor Calculator | Dyna |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/soil-sensor-calculator/id1332146282/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/dyna-gro-seed/id6446418205/reviews) |
| Number of ratings | **6** | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 9 MB | 15 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Chris Henry](https://appshunter.io/developer/1188474414) | [Nutrien AG Solutions, Inc.](https://appshunter.io/developer/516392831) |

## What reviewers say

### Soil Sensor Calculator

[App page](https://appshunter.io/ios/app/soil-sensor-calculator/id1332146282)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Dyna

[App page](https://appshunter.io/ios/app/dyna-gro-seed/id6446418205)

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.

**Highlights:** Seeding rate calculation, Rice drill calibration, Seed spacing calculation, Agricultural planting tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Soil Sensor Calculator free?

Soil Sensor Calculator is free to download, with no in-app purchases.

### Is Dyna free?

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

### Which has better reviews, Soil Sensor Calculator or Dyna?

Soil Sensor Calculator and Dyna are both rated 5.0 out of 5 on the App Store, from 6 and 2 ratings respectively.

### Do Soil Sensor Calculator or Dyna have ads?

Neither Soil Sensor Calculator nor Dyna shows ads.

### Which is updated more often, Soil Sensor Calculator or Dyna?

Soil Sensor Calculator ships an update every 5 months, and Dyna every 9 months. Most recently, Soil Sensor Calculator was updated on June 1, 2026 and Dyna on June 11, 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.*