# True vs Navigation Almanac

The clearest difference is review sentiment: Navigation Almanac at 100% against True's 0%. Navigation Almanac also leads on in-app purchases (none vs 1) and update cadence (weekly vs every 41 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. True sells 1 one-off in-app purchase. Navigation Almanac asks for nothing beyond the download.

True ships an update every 41 months, Navigation Almanac weekly. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | True | Navigation Almanac |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/navigation-almanac/id6777455516/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 41 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 4 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nejc Landeker](https://appshunter.io/developer/712909616) | [Vladyslav Zenchenko](https://appshunter.io/developer/6777455518) |

## What reviewers say

### True

[App page](https://appshunter.io/ios/app/true-wind-calculator/id712909613)

Calculate true wind direction and speed for sailing. Input vessel speed, apparent wind, and angle to determine accurate wind data.

**Highlights:** True-wind calculation, Vessel speed input, Apparent wind speed input, Apparent wind angle input, Vessel heading input

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $4.99 | one-time |


### Navigation Almanac

[App page](https://appshunter.io/ios/app/navigation-almanac/id6777455516)

This app provides a comprehensive offline celestial navigation toolkit. It calculates celestial body positions, sunrise/set times, and sky charts. It also offers tools for compass error correction and position fixing, all without requiring an internet connection.

**Highlights:** Offline celestial almanac data, Sight reduction calculations, Rise, set, and twilight times, Sky view chart and dome, Live GPS position and course, Compass error correction, Fix calculator

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

**In-app purchases:** none


## Frequently asked questions

### Is True free?

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

### Is Navigation Almanac free?

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

### Do True or Navigation Almanac have ads?

Neither True nor Navigation Almanac shows ads.

### Which is updated more often, True or Navigation Almanac?

True ships an update every 41 months, and Navigation Almanac weekly. Most recently, True was updated on October 9, 2026 and Navigation Almanac on October 17, 2026.

---

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