# VMGPolar vs PyNav

The clearest difference is in-app purchases: VMGPolar at none against PyNav's 1. VMGPolar also leads on update cadence (fortnightly vs every 5 weeks). PyNav's advantage is iOS requirement (13.4 vs 15.6). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. PyNav sells 1 one-off in-app purchase. VMGPolar asks for nothing beyond the download.

VMGPolar ships an update fortnightly, PyNav every 5 weeks. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | VMGPolar | PyNav |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/vmgpolar/id6451073241/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | **Free** | Freemium |
| Size | 1 MB | 14 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrei Skobtsov](https://appshunter.io/developer/1696471952) | [CL Consulting](https://appshunter.io/developer/6779253059) |

## What reviewers say

### VMGPolar

[App page](https://appshunter.io/ios/app/vmgpolar/id6451073241)

Calculate sailing wind and boat speed with this tool. Input three values to determine the rest and log your data for export. It helps build and validate polar graphs for sailing performance.

**Highlights:** Sailing wind and boat speed calculation, Input three values to calculate others, Save data into a log, Export log data, Build and validate polar graphs

**Features:** macOS Compatibility

**In-app purchases:** none


### PyNav

[App page](https://appshunter.io/ios/app/pynav/id6779253057)

This app provides NMEA instrument data and remote control for a pypilot autopilot. It can function as a standalone navigation hub, displaying wind, engine, and GPS data with customizable panels and configurable alarms.

**Highlights:** Pypilot autopilot control, NMEA instrument display, Customizable dashboard panels, Wind and engine data, GPS and waypoint navigation, Configurable alarms

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PyNav Pro | $7.99 | one-time |


## Frequently asked questions

### Is VMGPolar free?

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

### Is PyNav free?

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

### Do VMGPolar or PyNav have ads?

Neither VMGPolar nor PyNav shows ads.

### Which is updated more often, VMGPolar or PyNav?

VMGPolar ships an update fortnightly, and PyNav every 5 weeks. Most recently, VMGPolar was updated on October 6, 2026 and PyNav on October 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.*