APTROCK vs TrackBridge
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
APTROCK
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This app is used with the NFC smart lock provided by 4quad (www.4quad.com), which has no battery, no charging, high security, easy to use. With this APP you can manage multiple locks, quickly Lock & UnLock the lock, manage lock passwords, read & write the NDEF information etc.
TrackBridge
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Turn your iPhone into a precise head tracker for flight, racing, and truck sims - no extra hardware, no TrackIR, no account. Move your head, and the in-game camera follows. TrackBridge uses your iPhone's TrueDepth camera to capture your head's rotation and position, then streams it over your local network to OpenTrack on your PC. From there it drives head look in the sims you already play. HOW IT WORKS Your iPhone reads your head pose (yaw, pitch, roll and position) and sends it via UDP to OpenTrack. OpenTrack passes it on to your game - the same setup people use with dedicated tracking hardware, just with the phone you already own. QUICK SETUP 1. Install OpenTrack on your PC (free, open source). 2. In OpenTrack, set Input to "UDP over network". 3. Open TrackBridge and enter your PC's IP address (default port 4242). 4. Place your phone facing you - on a stand, a mount, or against your monitor. 5. Start tracking and look around in your sim. An in-app guide walks you through it the first time. FEATURES - 6 degrees of freedom: head rotation and position - Low-latency UDP streaming over your local Wi-Fi or hotspot - Works with any game OpenTrack supports - No dedicated hardware, no infrared clip, no reflectors - No account, no sign-up, no personal data required - Simple, focused interface - set it up once and play FREE, SUPPORTED BY ADS TrackBridge is free. To keep it that way, it's supported by rewarded video ads: watch one short video and unlock 4 hours of uninterrupted tracking. No subscriptions, no hidden costs, nothing to buy. SYSTEM REQUIREMENTS - iPhone with a TrueDepth camera (iPhone X or newer) - A PC running OpenTrack (Windows, Linux, or Mac) - iPhone and PC on the same local network Whether you're flying in your favorite flight sim, racing wheel-to-wheel, or hauling freight across the map in a truck sim, TrackBridge gives you natural, hardware-free head tracking straight from your iPhone.
Screenshots
Verdict
The clearest difference is ads: APTROCK at none against TrackBridge's shown. APTROCK also leads on iOS requirement (13.0 vs 17.0). TrackBridge's advantage is update cadence (weekly vs every 3 months). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
APTROCK ships an update every 3 months, TrackBridge weekly. The most recent releases landed on September 16, 2026 and September 19, 2026 respectively.
| Parameter | APTROCK | TrackBridge |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Weekly โ better |
| Ads | No โ better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod โ better | iPhone |
| Requires iOS | 13.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 48 MB | 5 MB |
| Age rating | 4+ | 12+ |
| Developer | Sixiangxian Enterprise Development (Shanghai) Co., Ltd. | Robin Rowinski |
In-app purchases
APTROCK
No in-app purchases
TrackBridge
No in-app purchases









