# Propeller Calc vs RC Flyer

The clearest difference is rating: RC Flyer at 4.0 against Propeller Calc's 3.0. RC Flyer also leads on update cadence (every 2 weeks vs every 21 months) and iOS requirement (15.1 vs 17.0). Propeller Calc's advantage is in-app purchases (none vs 4). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. RC Flyer sells 4 in-app purchases, starting at $0.99 per month. Propeller Calc asks for nothing beyond the download.

RC Flyer holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Propeller Calc ships an update every 21 months, RC Flyer every 2 weeks. The most recent releases landed on September 26, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Propeller Calc | RC Flyer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/propeller-calc/id478119478/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/rc-flyer/id6461816213/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 weeks** |
| Monetization | **Free** | Freemium |
| Size | 3 MB | 62 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Frode Rørvik](https://appshunter.io/developer/478119481) | [Matthew Takhar](https://appshunter.io/developer/1702720042) |

## What reviewers say

### Propeller Calc

[App page](https://appshunter.io/ios/app/propeller-calc/id478119478)

This utility calculates propeller performance metrics like pitch, gear ratio, RPM, slip, and speed. Input any four values, and the app computes the fifth, helping users understand the relationship between propeller design and boat performance.

**Highlights:** Calculate pitch, gear ratio, RPM, slip, and speed, Enter any four variables to find the fifth, Understand propeller slip and its impact, Supports iPhone and iPad, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### RC Flyer

[App page](https://appshunter.io/ios/app/rc-flyer/id6461816213)

This app helps radio control model pilots log, manage, and analyze their flights. It features a digital hangar, flight logging, maintenance reminders, and a flying site directory. A new flight replay feature allows for 3D visualization and review of flight data.

**Highlights:** Flight Replay for 3D visualization, Digital Hangar for model storage, Comprehensive flight logging, Maintenance reminders, Flying site directory, Club check-in and community features

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| 3 Month Membership | $2.99 | per 3 months |
| Yearly Membership | $9.99 | per year |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Propeller Calc free?

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

### Is RC Flyer free?

RC Flyer is free to download, with in-app purchases available.

### Which has better reviews, Propeller Calc or RC Flyer?

RC Flyer is rated higher. Propeller Calc averages 3.0 out of 5 from 1 ratings, while RC Flyer averages 4.0 from 1 ratings.

### Do Propeller Calc or RC Flyer have ads?

Neither Propeller Calc nor RC Flyer shows ads.

### Which is updated more often, Propeller Calc or RC Flyer?

Propeller Calc ships an update every 21 months, and RC Flyer every 2 weeks. Most recently, Propeller Calc was updated on September 26, 2026 and RC Flyer on October 8, 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.*