# GPT - Gpacers Poseidon Tracker — Gpacers Poseidon Tracker > Marine safety tracking system with real-time alerts and offline capabilities. (iPhone/iPad app by Yu Lung WANG.) - Source: https://appshunter.io/ios/app/gpt-gpacers-poseidon-tracker/id1446755315 (this page in markdown: same URL + `.md`) - Developer: [Yu Lung WANG](https://appshunter.io/developer/1446755314) - Category: Navigation, Productivity - Price: Free - Age rating: 4+ - Requires: iOS 17.2 · 51 MB - Languages: American English - Released: 2019-01-17 - Data updated: 2026-08-21 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gpt-gpacers-poseidon-tracker/id1446755315/reviews.md ## What is GPT? Short Description​ Real-time marine safety tracking with smart alerts, offline support & black box data.​ Full Description​ GPT App is the control center for the Gpacers Poseidon Tracking and Rescue System — a patented safety solution designed for marine professionals and water sports users. It integrates real-time positioning, intelligent alerts, offline operation, and black box recording using radio, GPS, internet, and LEO satellite networks.​ Whether you're diving, sailing, or managing offshore operations, GPT ensures full visibility and control over your team — even without internet access.​ Key Features:​ Smart Monitoring Map​ -- Track team members, passersby, and alert zones in real time. Coordinates, directions, and distances are updated instantly, with intuitive icons for every status.​ Advanced Alert System​ -- Boundary Alert: Triggers when a member exits the designated safe zone.​ -- Collision Alert: Warns of potential collisions within a 120° forward zone.​ -- Lost Signal Alert: Countdown-based personnel check: activates if no signal is received within 5 minutes.​ Flexible Connectivity​ Supports on-site (radio-based) and remote (internet/satellite) data transmission. Operates reliably even without Wi-Fi or mobile networks.​ Geofencing and Coordinate Settings​ Customize safety zones and choose between device, receiver, or manual origin settings for accurate tracking.​ Black Box Function​ Automatically logs all activity data — like a flight recorder — for full traceability and incident analysis.​ Simulator Mode for Training​ Includes a built-in simulator for safe, hands-on training without real-world deployment.​ ​ Smart Team Management​ Classify participants as Members or Passersby. View Absent Members and automatically update status when signal is received.​ ​ Multilingual UI​ Optimized for international users with language support and intuitive design.​ Ideal For​ • Scuba & freedivers​ • Water sports instructors & operators​ • Offshore personnel & patrol teams​ • Marine rescue coordinators​ • Research expeditions​ Hardware Requirement​ This app requires GPT-compatible hardware (e.g., transmitters, receivers, monitoring stations). Visit www.gpacers.com for more info.​ ## Key features - Real-time tracking map - Advanced alert system (boundary, collision, lost signal) - Offline operation support - Black box data logging - Simulator mode for training - Smart team management ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/gpt-gpacers-poseidon-tracker/id1446755315/reviews.md ### 5/5 — High-quality product *2025-04-25, version 1.2.84* This product truly makes me feel safe! A friend recommended it to me after using it themselves, and it only took me a few minutes to get the hang of it. It comes with innovative features like geofence-based preventive alerts—really impressive! ### 5/5 — A remarkable app *2025-04-23, version 1.2.84* This app is very easy to use, with a clear interface and simple operation. It allows me to dive with peace of mind. ### 1/5 — Very frustrating end user experience *2023-12-11, version 1.2.84* Outdated interface, connectivity issues and language issues make for a terrible experience. ## Frequently asked questions about GPT ### What is Gpacers Poseidon Tracker? Gpacers Poseidon Tracker is a marine safety tracking system that provides real-time positioning, smart alerts, offline operation, and black box recording for professionals and water sports users. It requires compatible GPT hardware to function. ### Does Gpacers Poseidon Tracker work offline? Yes, Gpacers Poseidon Tracker is designed to operate reliably even without internet access, utilizing radio-based transmission for on-site tracking and data logging. ### What types of alerts does Gpacers Poseidon Tracker offer? The app features an advanced alert system including Boundary Alerts for safe zone breaches, Collision Alerts for potential impacts, and Lost Signal Alerts for personnel check-ins. ### Can I train with Gpacers Poseidon Tracker? Yes, Gpacers Poseidon Tracker includes a built-in simulator mode, allowing for safe and hands-on training without requiring real-world deployment of hardware. ### What devices is Gpacers Poseidon Tracker compatible with? Gpacers Poseidon Tracker is available for iPhone and iPad devices. It requires specific GPT-compatible hardware to operate. ### How often is Gpacers Poseidon Tracker updated? The latest version of Gpacers Poseidon Tracker is 8.8, and it was last updated on June 28, 2026. This indicates a consistent update schedule. ### What is the age rating for Gpacers Poseidon Tracker? Gpacers Poseidon Tracker has an age rating of 4+, making it suitable for a wide range of users. The app is free to download and use. ### Does Gpacers Poseidon Tracker have ads? No, Gpacers Poseidon Tracker is free to download and does not contain advertisements, ensuring an uninterrupted user experience. ## Version history (last 5 releases) ### 9.10 — 2026-08-17 修正DEMO軌跡無法顯示問題 ### 9.8 — 2026-07-29 修改分享檔案附加檔名 ### 9.7 — 2026-07-28 過濾非法狀態 ### 9.5 — 2026-07-24 修正軌跡顯示邏輯 ### 9.4 — 2026-07-20 GPS飄移軌跡顯示優化 ## Apps similar to GPT | App | Rating | Price | Category | | --- | --- | --- | --- | | [esgps](https://appshunter.io/ios/app/esgps/id1063635923) | — | Free | Navigation | | [Boat Tracking](https://appshunter.io/ios/app/boat-tracking/id1602476994) | — | Free | Navigation | | [helpYou24](https://appshunter.io/ios/app/helpyou24/id954176604) | — | Free | Navigation | | [SnoPal: Ski & Snowboard](https://appshunter.io/ios/app/snopal-ski-and-snowboard/id6472486158) | 5.0 (6) | Free | Navigation | | [ego2up](https://appshunter.io/ios/app/ego2up/id1140422620) | — | Free | Navigation | | [San Francisco Subway map](https://appshunter.io/ios/app/san-francisco-subway-map/id6474816136) | — | Free | Navigation | --- *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 2026-08-21.*