# Nav Diag — Pro Location Diagnostics

> Advanced location and navigation diagnostics for iOS developers and professionals. (iPhone/iPad app by Alastair Bor.)

- Source: https://appshunter.io/ios/app/nav-diag/id6749821694 (this page in markdown: same URL + `.md`)
- Developer: [Alastair Bor](https://appshunter.io/developer/1824969204)
- Category: Navigation, Utilities
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 5 MB
- Languages: American English
- Released: 2025-08-25
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/nav-diag/id6749821694/reviews.md

## What is Nav Diag?

NavDiags is a comprehensive location and navigation diagnostics application for iOS developers, location-based service professionals, and tech enthusiasts needing detailed insights into their device's positioning capabilities.

CORE LOCATION FEATURES
Monitor real-time GPS coordinates with precision down to centimeters. Track location accuracy, speed, course direction, and altitude with live updates. View detailed location history with timestamps and export data for analysis. Set up custom geographic regions for entry and exit notifications. Monitor significant location changes and visit tracking for low-power location monitoring.

ADVANCED POSITIONING
Monitor compass heading with magnetic and true north readings. Track device motion with accelerometer, gyroscope, and magnetometer data. View location age and freshness indicators to understand data reliability.

IBEACON AND BLUETOOTH
Comprehensive iBeacon ranging to detect nearby Bluetooth beacons with signal strength analysis. Simulate iBeacon transmission to test beacon-based applications and location services. Discover nearby BLE devices and iBeacons with detailed signal analysis. Save and organize beacon configurations in a persistent library for easy reuse across ranging, discovery, and simulation features.

REGION MONITORING
Create circular geographic regions with customizable radius and notifications. Monitor region entry and exit events with detailed logging. Save and load region configurations from a persistent library. View region events history with timestamps and export capabilities. Visual map display of monitored regions and current location.

PROFESSIONAL DIAGNOSTICS
Detailed system capability analysis showing available location services and authorization status. Background location monitoring with comprehensive logging. Location permission analysis and troubleshooting guidance. 

DEVELOPER TOOLS
Real-time location service status monitoring. Detailed error reporting and debugging information. Custom UUID generation for iBeacon applications. Comprehensive location settings validation and recommendations.

USER INTERFACE
Clean, intuitive design optimized for both portrait and landscape orientations. Real-time data updates with customizable refresh rates. Dark mode support for comfortable viewing in all lighting conditions. Comprehensive search and filtering across all features. Export and share functionality for collaboration and reporting.

DATA MANAGEMENT
Persistent storage of location history, region events, and beacon configurations. Configurable data retention policies to manage storage usage. Bulk operations for managing large datasets. Advanced sorting and filtering options for efficient data analysis.

PRIVACY AND SECURITY
All location data remains on device with no cloud storage or external transmission. User-controlled data retention and deletion options. Transparent privacy controls with clear explanations of data usage. Optional data export only when explicitly requested by user.

TECHNICAL SPECIFICATIONS
Supports all iOS location services including GPS, WiFi, and cellular positioning. Compatible with all iBeacon and BLE 4.0 plus devices. Optimized for performance with minimal battery impact during standard operation. Comprehensive error handling and recovery mechanisms.

IDEAL FOR
iOS developers building location-aware applications who need detailed testing and debugging capabilities. Location service professionals requiring comprehensive diagnostic tools for troubleshooting and optimization. Technical users interested in understanding their device's location and navigation capabilities in detail.

Whether you are developing the next great location-based app, troubleshooting location service issues, or simply curious about how your iPhone determines its position, NavDiags provides the comprehensive tools and detailed information you need to understand and optimize location-based functionality on iOS devices.

## Key features

- Real-time GPS coordinate monitoring
- Motion sensor data (accelerometer, gyroscope)
- iBeacon ranging and simulation
- Customizable geographic region monitoring
- Location history export
- System capability analysis
- Background location monitoring

## Chart rankings

- #179 in Top Paid · Navigation (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/nav-diag/id6749821694/reviews.md

### 5/5 — Nice diagnostic tool

*2026-01-05*

Free and no ads. No tracking and nice way to see what’s going on behind the scenes with the navigation API

## Frequently asked questions about Nav Diag

### What is Nav Diag?

Nav Diag is a comprehensive application designed for iOS developers and location-based service professionals to diagnose and monitor device positioning capabilities. It offers detailed insights into GPS, motion data, and Bluetooth beacon interactions.

### How accurate is the GPS monitoring in Nav Diag?

Nav Diag monitors real-time GPS coordinates with precision down to centimeters. It also tracks location accuracy, speed, course direction, and altitude with live updates.

### Can Nav Diag monitor Bluetooth beacons?

Yes, Nav Diag offers comprehensive iBeacon ranging to detect nearby Bluetooth beacons with signal strength analysis. It also allows for simulating iBeacon transmission to test beacon-based applications.

### Does Nav Diag support offline use?

The provided description does not explicitly state offline capabilities. However, it mentions persistent storage of data on the device, suggesting some functionality may be available without an active internet connection for diagnostics.

### What devices is Nav Diag compatible with?

Nav Diag is compatible with iPhone and iPad devices. It is designed for iOS and supports both portrait and landscape orientations.

### How much does Nav Diag cost?

Nav Diag is a paid application, priced at $0.99. There are no in-app purchases or subscription fees mentioned.

### Is Nav Diag suitable for children?

Nav Diag has an age rating of 4+, indicating it is generally suitable for children. However, its advanced diagnostic features are primarily targeted towards developers and professionals.

### How often is Nav Diag updated?

The latest version of Nav Diag is 1.4, and it was last updated on March 31, 2026. This indicates a relatively active development cycle for the application.

## Version history (last 5 releases)

### 1.4.2 — 2026-07-15

This update is all about privacy, battery life, and reliability.

• Stronger privacy protections — Your location history, saved regions, and beacon library are now stored with full device encryption and are excluded from backups. The home screen widget now uses approximate coordinates (~100 m) instead of your exact position.
• Better battery life — Location history is now saved in efficient batches instead of on every GPS fix, and the widget refreshes more intelligently, reducing background disk and power usage during long tracking sessions.
• More reliable GPS readings — NavDiags now automatically rejects invalid fixes (out-of-range coordinates, stale or future timestamps) so your diagnostics reflect real data.
• Beacon improvements — Beacon configurations are validated before broadcasting begins, preventing invalid setups.
• Updated privacy policy — Now clearly explains the two Apple services the app talks to (weather and address lookup) and confirms that nothing else ever leaves your device.
• Plus a significant under-the-hood cleanup for a smaller, faster app.

### 1.4 — 2026-03-31

- GPS Signal Quality Score — Every fix is scored 0–100 and graded Excellent / Good / Degraded / Unreliable, with plain-English explanations and recommendations.                                                                                                                                         
- AR Location Overlay — Live GPS data (coordinates, altitude, accuracy, speed, heading, quality score) overlaid on the camera via ARKit. Save snapshots to your Camera Roll or record video.                                                                                                                     
- GPS Quality Home Screen Widget — Small and medium widgets showing live grade, score, and accuracy. Updated automatically on every GPS fix.             
- WeatherKit Integration — Live weather conditions (temperature, wind, humidity, UV index) in the Overview tab, with GPS relevance context.
- Location Intelligence — Clusters visit history to identify frequent locations and time-of-day patterns. Flags unfamiliar times and GPS/motion speed conflicts.                                                      
- Sensor Anomaly Detection — Rolling statistical analysis of magnetometer and accelerometer data detects interference, magnetic bias, and GPS/motion discrepancies.                                                                                                                                           
- Movement Trail on Map — The Overview map draws a blue polyline of your recent location history.                                                        
- HealthKit Step Comparison — Cross-validates CoreMotion step count against HealthKit's authoritative count to diagnose discrepancies.                   
- Cellular Radio & Carrier Info — Shows 5G/LTE/3G radio type and carrier name, with context on how radio type affects GPS fix speed.                     
- Network Depth — Distinguishes Low Data Mode and personal hotspot connections, both of which impact A-GPS performance.
- Geofence Entry/Exit Notifications — Local notifications when you enter or exit a monitored region, for hands-free geofence testing.                    
- Sensor Recording — Records accelerometer data in efficient batches using CMSensorRecorder while the device is inactive.

### 1.3 — 2026-03-20

Tons of bug fixes + 
  
- Location Precision (iOS 14+) — shows full vs. reduced accuracy, with a button to request temporary precise location
- Dual Altitude (iOS 15+) — displays both MSL and WGS84 ellipsoidal altitude side by side
- CLMonitor (iOS 17+) — async/await geofencing via Swift's AsyncSequence event stream
- Barometric Altimeter — real-time relative altitude and pressure via CMAltimeter
- Pedometer — live steps, distance, floors, pace, and cadence via CMPedometer
- Raw Sensor Streams — independent 10 Hz accelerometer, gyroscope, and magnetometer feeds
- AirPods Motion (iOS 14+) — 6-DOF motion data from AirPods Pro/Max via CMHeadphoneMotionManager
- Battery & Power State — live battery level, charging state, and Low Power Mode indicator
- Network Interface Type — Wi-Fi, Cellular, Ethernet, or Offline via NWPathMonitor
- Location Source Information (iOS 15+) — flags whether a fix came from GPS, was simulated, or came from an accessory

### 1.2 — 2026-03-18

Bug fixes, code quality and security improvements.

### 1.0 — 2025-08-25

No release notes.

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All apps by Alastair Bor: https://appshunter.io/developer/1824969204

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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 2026-08-27.*