# Drone Harmony Mobile vs GSD Drone Calculator

The clearest difference is rating: GSD Drone Calculator at 4.0 against Drone Harmony Mobile's 2.0. Drone Harmony Mobile's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. GSD Drone Calculator sells 3 in-app purchases, starting at $1.99 per month. Drone Harmony Mobile asks for nothing beyond the download.

GSD Drone Calculator holds the better App Store score, 4.0 against 2.0. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews complicate that: 9% of Drone Harmony Mobile's written reviews are positive against 0% of GSD Drone Calculator's, so the app with the better star average is not the one people write more warmly about.

Drone Harmony Mobile ships an update every 6 weeks, GSD Drone Calculator monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Drone Harmony Mobile | GSD Drone Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (6 ratings)](https://appshunter.io/ios/app/drone-harmony-mobile/id1602698517/reviews) | **[4.0 (3 ratings)](https://appshunter.io/ios/app/gsd-drone-calculator/id6450757319/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | **9.1% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 157 MB | 2 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Drone Harmony AG](https://appshunter.io/developer/1602698519) | [Roman Akhromieiev](https://appshunter.io/developer/1223973006) |

## What reviewers say

### 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


### GSD Drone Calculator

[App page](https://appshunter.io/ios/app/gsd-drone-calculator/id6450757319)

Calculate Ground Sample Distance (GSD) for drone missions with this intuitive tool. Input drone specs and camera details to get precise GSD values for optimal mapping, surveying, and photography. Streamline your data collection and enhance accuracy for all aerial endeavors.

**Highlights:** Accurate GSD calculations, Input drone and camera specifications, Real-time GSD values, Optimize flight planning, Intuitive user interface, Save calculations, Image resolution insights

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Month | $1.99 | per month |
| Annual | $19.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Drone Harmony Mobile free?

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

### Is GSD Drone Calculator free?

GSD Drone Calculator is free to download, with in-app purchases available.

### Which has better reviews, Drone Harmony Mobile or GSD Drone Calculator?

GSD Drone Calculator is rated higher. Drone Harmony Mobile averages 2.0 out of 5 from 6 ratings, while GSD Drone Calculator averages 4.0 from 3 ratings.

### Do Drone Harmony Mobile or GSD Drone Calculator have ads?

GSD Drone Calculator shows ads; Drone Harmony Mobile does not.

### Which is updated more often, Drone Harmony Mobile or GSD Drone Calculator?

Drone Harmony Mobile ships an update every 6 weeks, and GSD Drone Calculator monthly. Most recently, Drone Harmony Mobile was updated on November 3, 2026 and GSD Drone Calculator on November 3, 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.*