# GNSS Analyzer

> Records and analyzes QZSS satellite positioning data with map display and log import. (iPhone/iPad app by NEC Corporation.)

- Source: https://appshunter.io/ios/app/gnss-analyzer/id1040750117 (this page in markdown: same URL + `.md`)
- Developer: [NEC Corporation](https://appshunter.io/developer/423274625)
- Category: Utilities
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 24 MB
- Languages: American English, Japanese
- Released: 2015-10-12
- Data updated: 2026-07-30
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/gnss-analyzer/id1040750117/reviews.md

## What is GNSS Analyzer?

This application enables you to record positioning data by the Quasi-Zenith Satellite System (QZSS) supported receiver.

●What is GNSS Analyzer？
GNSS Analyzer enables you to record positioning data (NMEA log) by the QZSS supported receiver.
It is provided satellites radar and signal level (C/N).
You can also see the current position on the map.
In addition, you can import the recorded NMEA log and display on the radar and the map.
Furthermore, you can receive messages of Satellite Report for Disaster and Crisis Management "DC Report" that is known as QZSS services.
※You need QZSS supported receiver that is leased for free in the website below.
URL: https://qzss.go.jp/appli-demo/appli01_info.html

●GNSS Analyzer main functions
【NMEA】
・It shows positioning data as NMEA log by the receiver that are connected to your device (BLE connection).
・You can record output NMEA log in your device.
・Those recorded NMEA log file can be shared by e-mail.
【MapSky】
・It is provided satellites radar and signal level (C/N).
・You can also see the current position on the map.
【Preview】
・You can import the recorded NMEA log and display satellites radar, signal level and map position of time that you select.
【DC Report】
・It shows messages of "DC Report" from QZSS.
・You can select display language (English or Japanese) and filter massages by current location.

●Support version
-iOS 26
-iOS 18
-iOS 17
-iOS 16
-iOS 15
-iOS 14

## Key features

- Record NMEA positioning data
- View satellite radar and signal level
- Display current position on map
- Import and preview recorded NMEA logs
- Receive QZSS DC Reports
- Share NMEA log files via email

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/gnss-analyzer/id1040750117/reviews.md

### 1/5 — NEC 製とは

*2021-11-12, version 3.0.0*

やる気ないんかなとしか思えないアプリ。

### 1/5 — Needs a separate receiver device.

*2020-06-23*

Seems to be made to control an external qzss receiver, not to use your phone or iPad’s internal receivers.

### 3/5 — App doesn’t work.   Wish it would

*2019-04-25*

Tried on iPhone and iPad.   Can’t seem to connect Or even see the Bluetooth gps unit

### 1/5 — 汎用GPS受信機非対応

*2017-10-03, version 2.0.2*

説明文に書いてある通り、非対応を確認しました。

しかし、いつまで実証実験なのでしょうかね。
既に実用化の域に入っているのですから、そろそろ汎用GPS受信機にも対応して頂きたいです。

### 1/5 — Fake

*2017-03-18*

Fake App

## Frequently asked questions about GNSS Analyzer

### What is GNSS Analyzer?

GNSS Analyzer is a utility app that allows you to record and analyze positioning data from QZSS-supported receivers. It provides features like a satellite radar, signal strength display, and map visualization of your current location.

### Does GNSS Analyzer require a special receiver?

Yes, GNSS Analyzer requires a QZSS supported receiver. Information on how to lease a free receiver is available on the qzss.go.jp website.

### Can I import previously recorded data into GNSS Analyzer?

Yes, you can import recorded NMEA log files into GNSS Analyzer. This allows you to display the satellite radar, signal level, and map position for the time you select from the log.

### What are DC Reports in GNSS Analyzer?

DC Reports are messages from QZSS related to Satellite Report for Disaster and Crisis Management. GNSS Analyzer allows you to view these reports and filter them by current location or display language (English or Japanese).

### How can I share my recorded data?

You can share your recorded NMEA log files directly from GNSS Analyzer via email, making it easy to transfer your positioning data to others or for backup purposes.

### What devices is GNSS Analyzer compatible with?

GNSS Analyzer is supported on iPhone, iPad, and iPod. It requires iOS 14 or later.

### How often is GNSS Analyzer updated?

The latest version of GNSS Analyzer is 4.0.0, last updated on March 18, 2026. The app was initially released on October 12, 2015.

### What is the user rating for GNSS Analyzer?

GNSS Analyzer has a rating of 1.0 stars from 1 rating. This indicates a very limited number of user reviews available.

## Version history (last 5 releases)

### 4.0.0 — 2026-03-18

-iOS 26 compatible
-DC Report notification sound mute feature has been added.

### 3.0.3 — 2025-03-24

Now support iOS 18.

### 3.0.2 — 2023-05-08

- iOS 16対応

### 3.0.0 — 2019-04-09

・ Support for QZS-2 to 4
・ SLAS status indication correspondence

### 2.0.3 — 2018-02-27

- Bug fix.
- Now support iOS 11.2.

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All apps by NEC Corporation: https://appshunter.io/developer/423274625

## Related topics

[gnss view](https://appshunter.io/ios/topics/gnss-view) · [gnss status](https://appshunter.io/ios/topics/gnss-status) · [gnss analyzer](https://appshunter.io/ios/topics/gnss-analyzer) · [gnss](https://appshunter.io/ios/topics/gnss)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-30.*