# Crop Nutrient advisor vs SOS Viewer

The clearest difference is update cadence: SOS Viewer at fortnightly against Crop Nutrient advisor's every 3 months. Crop Nutrient advisor's advantage is iOS requirement (13.0 vs 15.6). 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.

Crop Nutrient advisor ships an update every 3 months, SOS Viewer fortnightly. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Crop Nutrient advisor | SOS Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 24 MB | 66 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nutrient Tech](https://appshunter.io/developer/1809878225) | [Tech Tree Sdn Bhd](https://appshunter.io/developer/1756843252) |

## What reviewers say

### Crop Nutrient advisor

[App page](https://appshunter.io/ios/app/crop-nutrient-advisor/id1170816834)

**Features:** macOS Compatibility

**In-app purchases:** none


### SOS Viewer

[App page](https://appshunter.io/ios/app/sos-viewer/id6742965163)

**In-app purchases:** none


## Frequently asked questions

### Is Crop Nutrient advisor free?

Crop Nutrient advisor is free to download, with no in-app purchases.

### Is SOS Viewer free?

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

### Do Crop Nutrient advisor or SOS Viewer have ads?

Neither Crop Nutrient advisor nor SOS Viewer shows ads.

### Which is updated more often, Crop Nutrient advisor or SOS Viewer?

Crop Nutrient advisor ships an update every 3 months, and SOS Viewer fortnightly. Most recently, Crop Nutrient advisor was updated on October 16, 2026 and SOS Viewer on October 15, 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.*