HKPF 175A vs Ghost Detector Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HKPF 175A
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二零一九年標誌着香港警隊成立175周年。為紀念這個特別時刻,警隊硏發這個應用程式,加深大家對警隊的認識。警隊會一如既往,致力確保香港繼續是世界上其中一個最安全及穩定的社會。 香港警務處研發「香港警隊一百七十五周年紀念特刊」流動應用程式,讓大家可隨時隨地瀏覽以下內容: * 擴增實境(AR)效果:觀看書中影片和立體模型; * 虛擬實境(VR)遊戲:探索警隊歷史和發展;以及 * 紀念特刊的全部內容(電子版)。 The year 2019 marks the 175th anniversary of the Hong Kong Police Force. This App is developed to commemorate this special moment and enable the public to gain a better understanding of the many facets of the Force. As always, the Force strives to ensure that Hong Kong remains one of the safest and most stable societies in the world. Hong Kong Police Force 175th Anniversary Commemorative Book” App, developed by the Hong Kong Police Force, gives you an instant access to the following: * Augmented Reality (AR) effects: watch the videos and 3D models in the book; * Virtual Reality (VR) game: explore the history and development of the Force; and * Full commemorative book (e-version).
Ghost Detector Pro
This app uses AI and AR to visualize and detect paranormal entities in real-time. It monitors electromagnetic fields, audio, and uses LiDAR for enhanced perception. Capture evidence with photos and videos, and utilize protection features.
- Real-time ghost visualization with AR
- Multi-sensor analysis (magnetic, audio, LiDAR)
- Adjustable detection intensity
- Photo and video recording with watermark
- Protection runes and mantras
- Ad-free experience with Pro upgrade
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# Unveil the invisible paranormal world using cutting-edge AI and AR technology. Ghost Detector Pro combines advanced Vision frameworks with multi-sensor fusion technology to detect and visualize supernatural entities in real-time. ### THIS APP MAY SCARE YOU ## Advanced Detection Features * **Real-Time Ghost Visualization** AI-driven body pose detection system creates skeleton overlays of detected entities, featuring realistic floating, breathing, and movement animations. * **Multi-Sensor Analysis** * Magnetic Field Monitoring: Track electromagnetic anomalies (X, Y, Z axes + Total Strength). * Audio Visualization: Dynamic waveform analysis for paranormal sounds. * LiDAR Support: Enhanced depth perception on compatible devices. * **Adjustable Detection Intensity** Choose Low, Medium, or High sensitivity modes to customize your ghost hunting experience. ## Capture & Record * **Photo & Video Recording** Capture evidence with real-time AR overlays showing detected entities. * **Professional Watermark** Timestamped captures to ensure authentic records. ## Protection Features * **Mystical Spell System** Activate protection runes and mantras (Full Version). * **Detection Mode Control** Fine-tune sensitivity for different paranormal environments. --- ## Pro Features **Upgrade to Unlock:** * Unlimited video recording & photo capture * Adjustable detection intensity controls * Protection spells & runes activation * Ad-free experience **Technical Specifications:** * Real-time skeleton animation system * Support for 40+ languages * Optimized for iOS devices with TrueDepth cameras **Perfect for paranormal investigators, ghost hunters, or anyone curious about the supernatural. Download now and start your ghost hunting journey!** --- ### WARNING If you are a very sensitive or easily scared individual, please consider not using this app and closing it. Do not put yourself in danger while using this app. If you feel you are in danger, close the app immediately, contact someone for help, and leave the area immediately. ### DISCLAIMER Please remember that since the app uses the different sensors of the device, we cannot guarantee the accuracy of any ghost detection, which largely depends on the precision and quality of the terminal. Since paranormal activity cannot be scientifically proven, we cannot guarantee that the app communicates with real spirits. The results of this app cannot be scientifically verified. Detection results are based on sensor data and AI algorithms. ### You must upgrade to Pro to use this app. **Subscription Details:** - Payment: Charges will be deducted from your iTunes account upon confirmation of purchase. - Automatic Renewal: Your subscription renews automatically unless turned off at least 24 hours before the end of the current period. - Renewal Charges: Your account will be charged for renewal within 24 hours before the current period ends. The fee will be provided by the system. - Subscription Management: Manage your subscriptions and turn off auto-renew in your account settings after purchase. - Cancellation and Refund: Managed directly by the store. - Free Trial: Any unused portion of a free trial is forfeited when a subscription is purchased. For more details, view our Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Read our Privacy Policy: https://www.kai7.app/p/privacy-policy-no-tracking.html
Screenshots
Verdict
The clearest difference is in-app purchases: HKPF 175A at none against Ghost Detector Pro's 3. HKPF 175A also leads on update cadence (every 5 days vs every 5 weeks) and device support (3 vs 1). On price and ads there is nothing between them.
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. Ghost Detector Pro sells 3 in-app purchases, starting at $5.99 per 7 days. HKPF 175A asks for nothing beyond the download.
HKPF 175A ships an update every 5 days, Ghost Detector Pro every 5 weeks. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.
| Parameter | HKPF 175A | Ghost Detector Pro |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (45 ratings) — better |
| Number of ratings | — | 45 — better |
| Update frequency | Every 5 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 400 MB | 18 MB |
| Age rating | 4+ | 9+ |
| Developer | Hong Kong Police College | Kai Chi Tsao |
In-app purchases
HKPF 175A
No in-app purchases
Ghost Detector Pro
- Ghost Detector Full Weekly$5.997 Days
- Ghost Detector Annual$24.991 Year
- Ghost Detector Pro Lifetime$39.99









