# 长安HUD vs RTK Helper

The clearest difference is price: 长安HUD at Free against RTK Helper's $0.99. 长安HUD also leads on iOS requirement (12.0 vs 17.6). RTK Helper's advantage is update cadence (every 3 days vs every 3 weeks). On ads, in-app purchases and device support there is nothing between them.

长安HUD is free to download; RTK Helper costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

长安HUD ships an update every 3 weeks, RTK Helper every 3 days. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | 长安HUD | RTK Helper |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rtk-helper/id6755748761/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Paid |
| Size | 113 MB | 5 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chongqing Pengri Science and Technology Development Co,Ltd.](https://appshunter.io/developer/1302227747) | [亦隆 朱](https://appshunter.io/developer/1855893826) |

## What reviewers say

### 长安HUD

[App page](https://appshunter.io/ios/app/hud-app/id1403226612)

**Features:** macOS Compatibility

**In-app purchases:** none


### RTK Helper

[App page](https://appshunter.io/ios/app/rtk-helper/id6755748761)

This professional tool provides centimeter-level positioning accuracy for users requiring precise location data. It connects to RTK/GNSS receivers, offers NTRIP client functionality for real-time corrections, and displays detailed positioning information. Features include interest point and track recording, GPX export, and measurement tools.

**Highlights:** Bluetooth RTK/GNSS receiver connection, NTRIP client for differential correction data, Real-time positioning and accuracy display, Interest point and track recording, GPX export for compatibility, Distance and area measurement tools

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

**In-app purchases:** none


## Frequently asked questions

### Is 长安HUD free?

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

### Is RTK Helper free?

RTK Helper costs $0.99, with no in-app purchases.

### Do 长安HUD or RTK Helper have ads?

Neither 长安HUD nor RTK Helper shows ads.

### Which is updated more often, 长安HUD or RTK Helper?

长安HUD ships an update every 3 weeks, and RTK Helper every 3 days. Most recently, 长安HUD was updated on November 11, 2026 and RTK Helper on November 12, 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.*