USB vs Device Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
USB
Read full descriptionHide full description
APP用來註冊設定USB-921 地震儀, 安裝地震儀用戶, 可接收【P波警報】,【特快報】,【地震快報】,【最大震度】推播通知
Device Tracker
Quickly find lost Bluetooth devices like earbuds and smartwatches. The app uses real-time signal detection to guide you, showing proximity strength and alerting you when you're close. Simply move around and follow the distance indicator to pinpoint your item.
- Real-time Bluetooth device searching
- Proximity distance indicator
- Live sound/vibration alerts
- Broad accessory compatibility
- Favorite device pinning
Read full descriptionHide full description
Device Finder helps you quickly locate nearby Bluetooth-enabled devices such as wireless earbuds, headphones, smartwatches, speakers, and other compatible accessories. Using real-time Bluetooth signal detection, the app guides you toward your device by showing proximity strength and alerts when you are nearby. Simply move around and follow the distance indicator to pinpoint your lost item. Disclaimer: This app is not affiliated with, endorsed by, or sponsored by Apple Inc. AirPods is a trademark of Apple Inc. KEY FEATURES • Device Searching: Instantly view nearby Bluetooth devices in real time. • Distance Indicator: Track proximity using a signal-based distance score. • Broad Compatibility: Works with many Bluetooth audio and accessory devices. • Live Alerts: Receive sound or vibration alerts when your device is nearby. • Favorite Devices: Pin frequently used devices for faster access. HOW IT WORKS • Open Device Tracker and start scanning. • Nearby Bluetooth devices are detected automatically. • Move around while observing the distance indicator. • When close, the app alerts you to help you locate your device. PREMIUM SUBSCRIPTION This app offers auto-renewable subscription options to unlock premium features. • Subscription Title: Premium Access • Subscription Duration: Monthly and Yearly • Subscription Price: – $4.99 per month – $19.99 per year – $69.99 lifetime Payment will be charged to your Apple ID account at the confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription at any time in your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ CONNECT WITH US Questions or feedback? We'd love to hear from you!
Screenshots
Verdict
The clearest difference is in-app purchases: USB at none against Device Tracker's 4. USB also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support 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. Device Tracker sells 4 in-app purchases, starting at $4.99 per 7 days. USB asks for nothing beyond the download.
USB ships an update every 3 months, Device Tracker every 2 months. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.
| Parameter | USB | Device Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 201 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Merry-Link Co.,Ltd. | Md Manik Miah |
In-app purchases
USB
No in-app purchases
Device Tracker
- Weekly Subscription$4.997 Days
- Monthly Subscription$4.991 Month
- Yearly Subscription$19.991 Year
- Lifetime Subscription$69.99









