# GPSlogger Kalman vs VMGPolar

The clearest difference is in-app purchases: VMGPolar at none against GPSlogger Kalman's 1. VMGPolar also leads on update cadence (fortnightly vs monthly) and iOS requirement (15.6 vs 17.6). On price, ads and device support there is nothing between them.

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

GPSlogger Kalman ships an update monthly, VMGPolar fortnightly. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | GPSlogger Kalman | VMGPolar |
| --- | --- | --- |
| 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 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | — | Free |
| Size | 15 MB | 1 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Almansor Kerroum](https://appshunter.io/developer/1521553556) | [Andrei Skobtsov](https://appshunter.io/developer/1696471952) |

## What reviewers say

### GPSlogger Kalman

[App page](https://appshunter.io/ios/app/gpslogger-kalman/id1521553554)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $3.99 | one-time |


### 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


## Frequently asked questions

### Is GPSlogger Kalman free?

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

### Is VMGPolar free?

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

### Do GPSlogger Kalman or VMGPolar have ads?

Neither GPSlogger Kalman nor VMGPolar shows ads.

### Which is updated more often, GPSlogger Kalman or VMGPolar?

GPSlogger Kalman ships an update monthly, and VMGPolar fortnightly. Most recently, GPSlogger Kalman was updated on November 7, 2026 and VMGPolar on November 3, 2026.

---

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