# Janmar Systems Field Assistant vs Sonar Field Tech

The clearest difference is rating: Janmar Systems Field Assistant at 4.2 against Sonar Field Tech's 1.8. Janmar Systems Field Assistant also leads on iOS requirement (13.0 vs 15.0). Sonar Field Tech's advantage is ratings volume (30 vs 5). 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.

Janmar Systems Field Assistant holds the better App Store score, 4.2 against 1.8. That said, the two scores are not equally well evidenced: Sonar Field Tech has 30 ratings behind it against 5, so its average is the more settled of the two.

Janmar Systems Field Assistant ships an update monthly, Sonar Field Tech every 5 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Janmar Systems Field Assistant | Sonar Field Tech |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/janmar-systems-field-assistant/id1476109173/reviews)** | [1.8 (30 ratings)](https://appshunter.io/ios/app/sonar-field-tech/id1524107004/reviews) |
| Number of ratings | 5 | **30** |
| Positive reviews | — | 7.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 85 MB | 97 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janmar Systems](https://appshunter.io/developer/1476109172) | [Sonar Software](https://appshunter.io/developer/1524107006) |

## What reviewers say

### Janmar Systems Field Assistant

[App page](https://appshunter.io/ios/app/janmar-systems-field-assistant/id1476109173)

This app streamlines landscape field service operations by providing crews with real-time job information, task management, and data capture tools. It replaces paper forms with digital solutions, enabling efficient job costing and improved decision-making for businesses.

**Highlights:** Real-time job instructions and routes, Digital task management with photos, Customizable data capture forms, Pesticide and inventory usage tracking, GPS tracking for job costing, Spanish language support

**Features:** macOS Compatibility

**In-app purchases:** none


### Sonar Field Tech

[App page](https://appshunter.io/ios/app/sonar-field-tech/id1524107004)

Streamline field service operations with offline access to critical job information and tools. Capture data, manage inventory, and automate post-job tasks like invoicing and customer communication. Improve efficiency and customer satisfaction with digital documentation and GPS navigation.

**Highlights:** Offline mode for uninterrupted work, On-the-go data capture (docs, photos, notes), E-signatures and digital contracts, GPS route guidance, Customizable task lists, Automated invoicing and provisioning, In-app barcode scanner for inventory

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

**In-app purchases:** none


## Frequently asked questions

### Is Janmar Systems Field Assistant free?

Janmar Systems Field Assistant is free to download, with no in-app purchases.

### Is Sonar Field Tech free?

Sonar Field Tech is free to download, with no in-app purchases.

### Which has better reviews, Janmar Systems Field Assistant or Sonar Field Tech?

Janmar Systems Field Assistant is rated higher. Janmar Systems Field Assistant averages 4.2 out of 5 from 5 ratings, while Sonar Field Tech averages 1.8 from 30 ratings.

### Do Janmar Systems Field Assistant or Sonar Field Tech have ads?

Neither Janmar Systems Field Assistant nor Sonar Field Tech shows ads.

### Which is updated more often, Janmar Systems Field Assistant or Sonar Field Tech?

Janmar Systems Field Assistant ships an update monthly, and Sonar Field Tech every 5 weeks. Most recently, Janmar Systems Field Assistant was updated on October 29, 2026 and Sonar Field Tech on October 24, 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.*