# NavySync vs Rocket Calculator

The clearest difference is in-app purchases: NavySync at none against Rocket Calculator's 1. NavySync also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Rocket Calculator sells 1 one-off in-app purchase. NavySync asks for nothing beyond the download.

NavySync ships an update every 11 days, Rocket Calculator weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NavySync | Rocket Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (13 ratings)](https://appshunter.io/ios/app/navysync/id6754468754/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Weekly** |
| Monetization | Free | — |
| Size | 42 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YI YE](https://appshunter.io/developer/6809550710) | [毅 王](https://appshunter.io/developer/6774631380) |

## What reviewers say

### NavySync

[App page](https://appshunter.io/ios/app/navysync/id6754468754)

This agenda and planner app connects NJROTC instructors, cadets, and parents. It features a shared calendar for unit activities, team-specific event details, and study materials for advancements. Additional tools include a ribbon rack builder and instructional videos.

**Highlights:** Unit activity calendar, Team event details, Study materials for advancements, Ribbon rack builder, Instructional videos

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

**In-app purchases:** none


### Rocket Calculator

[App page](https://appshunter.io/ios/app/rocket-calculator-apogeefield/id6778329350)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is NavySync free?

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

### Is Rocket Calculator free?

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

### Do NavySync or Rocket Calculator have ads?

Neither NavySync nor Rocket Calculator shows ads.

### Which is updated more often, NavySync or Rocket Calculator?

NavySync ships an update every 11 days, and Rocket Calculator weekly. Most recently, NavySync was updated on November 5, 2026 and Rocket Calculator on October 31, 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.*