# Celestial Navigator vs qtVlm

The clearest difference is review sentiment: qtVlm at 79% against Celestial Navigator's 43%. qtVlm also leads on rating (3.7 vs 3.2) and update cadence (weekly vs every 9 months). Celestial Navigator's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. qtVlm sells 1 one-off in-app purchase. Celestial Navigator asks for nothing beyond the download.

qtVlm holds the better App Store score, 3.7 against 3.2. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews point the same way: 43% of Celestial Navigator's written reviews are positive against 79% of qtVlm's.

Celestial Navigator ships an update every 9 months, qtVlm weekly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Celestial Navigator | qtVlm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (5 ratings)](https://appshunter.io/ios/app/celestial-navigator/id696927722/reviews) | **[3.7 (9 ratings)](https://appshunter.io/ios/app/qtvlm/id999110023/reviews)** |
| Number of ratings | 5 | **9** |
| Positive reviews | 42.9% of reviews | **79.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 100 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Omar reis](https://appshunter.io/developer/687921629) | [Meltemus SAS](https://appshunter.io/developer/999110022) |

## What reviewers say

### Celestial Navigator

[App page](https://appshunter.io/ios/app/celestial-navigator/id696927722)

This app assists with celestial navigation training by providing a perpetual almanac, star finder chart with animation, and tools for calculating lines of position and meridian passages. It can utilize device sensors for real-time chart positioning, though a marine sextant is still required for actual navigation.

**Highlights:** Perpetual almanac, Animated star finder chart, Line of position calculation, Meridian passage calculation, Real-time sensor integration, Celestial object data

**Features:** macOS Compatibility

**In-app purchases:** none


### qtVlm

[App page](https://appshunter.io/ios/app/qtvlm/id999110023)

This navigation software is designed for sailing boats, offering a free version with basic GRIB viewing and an optional full version with advanced weather routing, chart modules, and communication features. It supports various chart formats and NMEA data sources, with a simulation mode for learning.

**Highlights:** GRIB viewer with advanced functions, Weather routing and route modules, Support for Raster, Vector, and MBTiles charts, Harmonic file support for tides and currents, AIS and Iridium GO! communication, Anchor Alarm module, Simulation Mode for learning

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $49.99 | one-time |


## Frequently asked questions

### Is Celestial Navigator free?

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

### Is qtVlm free?

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

### Which has better reviews, Celestial Navigator or qtVlm?

qtVlm is rated higher. Celestial Navigator averages 3.2 out of 5 from 5 ratings, while qtVlm averages 3.7 from 9 ratings.

### Do Celestial Navigator or qtVlm have ads?

Neither Celestial Navigator nor qtVlm shows ads.

### Which is updated more often, Celestial Navigator or qtVlm?

Celestial Navigator ships an update every 9 months, and qtVlm weekly. Most recently, Celestial Navigator was updated on October 23, 2026 and qtVlm on October 24, 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.*