# Propeller vs Fernox

Propeller and Fernox are too close to call on the numbers: across 7 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Propeller ships an update fortnightly, Fernox every 4 weeks. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Propeller | Fernox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fernox/id6615081080/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Monetization | Free | Free |
| Size | 83 MB | 57 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Propeller Powered Ltd](https://appshunter.io/developer/694591869) | [Fernox Ltd](https://appshunter.io/developer/506290125) |

## What reviewers say

### Propeller

[App page](https://appshunter.io/ios/app/propeller/id694591766)

This app streamlines field service operations for businesses with mobile engineers. It allows for electronic completion of all paperwork, job management, and real-time data syncing with an online portal. Secure cloud storage ensures compliance and eliminates lost documents.

**Highlights:** Real-time job information access, Electronic document creation, Customer database management, Job scheduling and diary management, Access to manufacturer literature, Photo documentation of work, Industry-standard certification generation

**Features:** Vision Pro support

**In-app purchases:** none


### Fernox

[App page](https://appshunter.io/ios/app/fernox/id6615081080)

This platform offers comprehensive water testing capabilities with an enhanced user experience. It allows users to invite managers to view submissions, features improved security with biometric login options, and includes a global address finder for efficient property detail input.

**Highlights:** Water testing capabilities, Manager viewing of submissions, Biometric/Passcode login, Global address finder, Automatic property re-testing recognition, Streamlined registration

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

**In-app purchases:** none


## Frequently asked questions

### Is Propeller free?

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

### Is Fernox free?

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

### Do Propeller or Fernox have ads?

Neither Propeller nor Fernox shows ads.

### Which is updated more often, Propeller or Fernox?

Propeller ships an update fortnightly, and Fernox every 4 weeks. Most recently, Propeller was updated on September 9, 2026 and Fernox on September 21, 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.*