# EarthOptics Sampling vs Field Promax Plus

The clearest difference is rating: Field Promax Plus at 5.0 against EarthOptics Sampling's 4.6. Field Promax Plus also leads on iOS requirement (15.0 vs 18.0). EarthOptics Sampling's advantage is ratings volume (8 vs 1). On price, update cadence, 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.

Field Promax Plus holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: EarthOptics Sampling has 8 ratings behind it against 1, so its average is the more settled of the two.

EarthOptics Sampling ships an update every 8 days, Field Promax Plus weekly. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | EarthOptics Sampling | Field Promax Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (8 ratings)](https://appshunter.io/ios/app/earthoptics-sampling/id1471211352/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/field-promax-plus/id6446847200/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Free | Free |
| Size | 95 MB | 76 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Pattern Ag, Inc.](https://appshunter.io/developer/1471211351) | [Field Promax LLC](https://appshunter.io/developer/1073824773) |

## What reviewers say

### EarthOptics Sampling

[App page](https://appshunter.io/ios/app/earthoptics-sampling/id1471211352)

This application assists field professionals in executing soil sampling protocols with precision. It leverages advanced soil data and services, including in-field sensing and laboratory testing, to provide comprehensive soil management data.

**Highlights:** Soil attribute measurement and quantification, In-field proximal sensing, Laboratory testing integration, Field sampling protocol execution, Soil management data products

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Field Promax Plus

[App page](https://appshunter.io/ios/app/field-promax-plus/id6446847200)

Manage field service operations with this app. Create and update work orders, generate estimates, and capture customer signatures. Streamline invoicing and payment collection, and track technician locations.

**Highlights:** Create and update work orders, Generate and update estimates, Upload before/after images, Collect customer signatures, Email invoices and collect payments, Track technician locations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is EarthOptics Sampling free?

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

### Is Field Promax Plus free?

Field Promax Plus is free to download, with no in-app purchases.

### Which has better reviews, EarthOptics Sampling or Field Promax Plus?

Field Promax Plus is rated higher. EarthOptics Sampling averages 4.6 out of 5 from 8 ratings, while Field Promax Plus averages 5.0 from 1 ratings.

### Do EarthOptics Sampling or Field Promax Plus have ads?

Neither EarthOptics Sampling nor Field Promax Plus shows ads.

### Which is updated more often, EarthOptics Sampling or Field Promax Plus?

EarthOptics Sampling ships an update every 8 days, and Field Promax Plus weekly. Most recently, EarthOptics Sampling was updated on October 19, 2026 and Field Promax Plus on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*