# Propeller Calc vs BalanceVision

The clearest difference is price: Propeller Calc at Free against BalanceVision's $4.99. BalanceVision's advantage is rating (5.0 vs 3.0) and iOS requirement (12.0 vs 17.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Propeller Calc is free to download; BalanceVision costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BalanceVision holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Propeller Calc ships an update every 21 months, BalanceVision every 41 months. The most recent releases landed on September 9, 2026 and July 9, 2026 respectively.

## The numbers

| Metric | Propeller Calc | BalanceVision |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/propeller-calc/id478119478/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/balancevision/id568965170/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 21 months** | Every 41 months |
| Monetization | **Free** | Paid |
| Size | 3 MB | 7 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Frode Rørvik](https://appshunter.io/developer/478119481) | [Motionics, LLC](https://appshunter.io/developer/424498959) |

## 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


### BalanceVision

[App page](https://appshunter.io/ios/app/balancevision/id568965170)

This utility app assists with machine rotor balancing by using your device's camera to pinpoint the exact angular location for trial or correction weights. It integrates with other balancing tools to provide precise measurements.

**Highlights:** Camera-based angular location, Support for trial weights, Support for correction weights, Integration with other balancing apps, Precise measurement tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Propeller Calc free?

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

### Is BalanceVision free?

BalanceVision costs $4.99, with no in-app purchases.

### Which has better reviews, Propeller Calc or BalanceVision?

BalanceVision is rated higher. Propeller Calc averages 3.0 out of 5 from 1 ratings, while BalanceVision averages 5.0 from 1 ratings.

### Do Propeller Calc or BalanceVision have ads?

Neither Propeller Calc nor BalanceVision shows ads.

### Which is updated more often, Propeller Calc or BalanceVision?

Propeller Calc ships an update every 21 months, and BalanceVision every 41 months. Most recently, Propeller Calc was updated on September 9, 2026 and BalanceVision on July 9, 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.*