# NavCalc Dynamic vs TrueLevel

The clearest difference is in-app purchases: NavCalc Dynamic at none against TrueLevel's 1. NavCalc Dynamic also leads on update cadence (every 6 days vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. TrueLevel sells 1 one-off in-app purchase. NavCalc Dynamic asks for nothing beyond the download.

NavCalc Dynamic ships an update every 6 days, TrueLevel monthly. Both last shipped on September 27, 2026.

## The numbers

| Metric | NavCalc Dynamic | TrueLevel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/navcalc-dynamic/id1638841716/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Monthly |
| Monetization | Free | — |
| Size | 15 MB | 3 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Richard Craddock](https://appshunter.io/developer/1579756955) | [Daniil Mukashev](https://appshunter.io/developer/1833839105) |

## What reviewers say

### NavCalc Dynamic

[App page](https://appshunter.io/ios/app/navcalc-dynamic/id1638841716)

This app calculates the course and speed needed to counteract current and wind effects for navigation. It visually displays these calculations on a compass rose, dynamically updating as parameters change. Useful for learning and solving real-world sailing problems.

**Highlights:** Calculate Course to Steer (CtS), Calculate Speed over Ground (SoG), Visual compass rose display, Dynamic parameter updates, Magnetic variation input, Leeway and wind direction input

**Features:** macOS Compatibility

**In-app purchases:** none


### TrueLevel

[App page](https://appshunter.io/ios/app/truelevel-bubble-level-tool/id6760949015)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrueLevel Pro | $3.99 | one-time |


## Frequently asked questions

### Is NavCalc Dynamic free?

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

### Is TrueLevel free?

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

### Do NavCalc Dynamic or TrueLevel have ads?

Neither NavCalc Dynamic nor TrueLevel shows ads.

### Which is updated more often, NavCalc Dynamic or TrueLevel?

NavCalc Dynamic ships an update every 6 days, and TrueLevel monthly. Most recently, NavCalc Dynamic was updated on September 27, 2026 and TrueLevel on September 27, 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.*