# RC Heli Toolbox vs Harry's Dyno

The clearest difference is review sentiment: RC Heli Toolbox at 50% against Harry's Dyno's 0%. RC Heli Toolbox also leads on price (Free vs $3.99). Harry's Dyno's advantage is iOS requirement (12.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

RC Heli Toolbox is free to download; Harry's Dyno costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | RC Heli Toolbox | Harry's Dyno |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[1.0 (2 ratings)](https://appshunter.io/ios/app/harrys-dyno/id1148400332/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 5 MB | 41 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Augusto Arevalo](https://appshunter.io/developer/963092345) | [Harald Schlangmann](https://appshunter.io/developer/307688601) |

## What reviewers say

### RC Heli Toolbox

[App page](https://appshunter.io/ios/app/rc-heli-toolbox/id963092346)

This app provides RC helicopter pilots with essential tools like a head speed calculator, pitch gauge, flight timer, and GPS recorder. It also offers access to manuals and unit conversions, all designed by experienced pilots.

**Highlights:** Interactive head speed calculator, Ultra-high precision pitch gauge, GPS altitude and speed recorder, Talking flight timer, Units converter, Access to AEON RC manuals

**Features:** macOS Compatibility

**In-app purchases:** none


### Harry's Dyno

[App page](https://appshunter.io/ios/app/harrys-dyno/id1148400332)

Measure vehicle performance with high precision using GPS and OBD sensors. Test acceleration and deceleration across custom speed ranges, analyze detailed results, and store data locally. Supports external sensors for enhanced accuracy.

**Highlights:** GPS and OBD sensor integration, Custom speed range testing (acceleration/deceleration), Detailed results analysis, Two-cursor data inspection, Local data storage and filtering, Data export to various formats

**In-app purchases:** none


## Frequently asked questions

### Is RC Heli Toolbox free?

RC Heli Toolbox is free to download, with no in-app purchases.

### Is Harry's Dyno free?

Harry's Dyno costs $3.99, with no in-app purchases.

### Do RC Heli Toolbox or Harry's Dyno have ads?

Neither RC Heli Toolbox nor Harry's Dyno shows ads.

### Which is updated more often, RC Heli Toolbox or Harry's Dyno?

RC Heli Toolbox ships an update every 3 months, and Harry's Dyno every 3 months. Most recently, RC Heli Toolbox was updated on October 24, 2026 and Harry's Dyno on October 26, 2026.

---

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