GNSS Analyzer vs GWL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GNSS Analyzer
Record and analyze positioning data from QZSS-supported receivers. View satellite radar, signal strength, and current location on a map. Import logs to review past data and receive disaster management reports.
- 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
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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
GWL
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This app scans for Ground water sensor and reads the depth of water
Screenshots
Verdict
GNSS Analyzer and GWL are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GNSS Analyzer ships an update every 12 months, GWL every 14 months. The most recent releases landed on September 18, 2026 and December 8, 2025 respectively.
| Parameter | GNSS Analyzer | GWL |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 12 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 10 MB |
| Age rating | 4+ | 17+ |
| Developer | NEC Corporation | Smart Sensor Devices AB |
In-app purchases
GNSS Analyzer
No in-app purchases
GWL
No in-app purchases
