# Alpha Shell vs Dyna

The clearest difference is update cadence: Alpha Shell at every 6 weeks against Dyna's every 9 months. Alpha Shell also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Alpha Shell ships an update every 6 weeks, Dyna every 9 months. The most recent releases landed on September 19, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Alpha Shell | Dyna |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dyna-gro-seed/id6446418205/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | — | Free |
| Size | 25 MB | 15 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Alpha Software, Corporation](https://appshunter.io/developer/874677887) | [Nutrien AG Solutions, Inc.](https://appshunter.io/developer/516392831) |

## What reviewers say

### Alpha Shell

[App page](https://appshunter.io/ios/app/alpha-shell/id1561405811)

**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 Alpha Shell free?

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

### Is Dyna free?

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

### Do Alpha Shell or Dyna have ads?

Neither Alpha Shell nor Dyna shows ads.

### Which is updated more often, Alpha Shell or Dyna?

Alpha Shell ships an update every 6 weeks, and Dyna every 9 months. Most recently, Alpha Shell was updated on September 19, 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.*