# Virtual Ringelmann vs Drone Harmony Mobile

The clearest difference is review sentiment: Virtual Ringelmann at 50% against Drone Harmony Mobile's 9%. 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.

Virtual Ringelmann ships an update monthly, Drone Harmony Mobile every 6 weeks. The most recent releases landed on September 29, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Virtual Ringelmann | Drone Harmony Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (6 ratings)](https://appshunter.io/ios/app/drone-harmony-mobile/id1602698517/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | **50.0% of reviews** | 9.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 73 MB | 157 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ACT Sistemas LTDA](https://appshunter.io/developer/1569392578) | [Drone Harmony AG](https://appshunter.io/developer/1602698519) |

## What reviewers say

### Virtual Ringelmann

[App page](https://appshunter.io/ios/app/virtual-ringelmann/id1569392576)

This app aids in black smoke inspections by virtualizing the Ringelmann Scale methodology through your device's camera. It streamlines the process for assessing emissions from diesel engines and industrial chimneys, supporting environmental compliance and decision-making.

**Highlights:** Virtual Ringelmann Scale measurement, Supports vehicular and stationary surveillance, Automatic pollution index identification, Generates photographic evidence, Web portal integration for reports, Historical data logging

**Features:** macOS Compatibility

**In-app purchases:** none


### Drone Harmony Mobile

[App page](https://appshunter.io/ios/app/drone-harmony-mobile/id1602698517)

Plan and execute drone flights directly from your iPhone or iPad. This app allows you to synchronize with the cloud, load sites, and adapt flight plans for mapping and inspection missions. Future updates will introduce a 3D interface and expanded drone compatibility.

**Highlights:** iOS flight planning and execution, Cloud synchronization, Load and adapt flight plans, Mapping & Inspection mission support, Terrain category missions, Gimbal adjustments

**In-app purchases:** none


## Frequently asked questions

### Is Virtual Ringelmann free?

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

### Is Drone Harmony Mobile free?

Drone Harmony Mobile is free to download, with no in-app purchases.

### Do Virtual Ringelmann or Drone Harmony Mobile have ads?

Neither Virtual Ringelmann nor Drone Harmony Mobile shows ads.

### Which is updated more often, Virtual Ringelmann or Drone Harmony Mobile?

Virtual Ringelmann ships an update monthly, and Drone Harmony Mobile every 6 weeks. Most recently, Virtual Ringelmann was updated on September 29, 2026 and Drone Harmony Mobile 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.*