Comparison

Smart Head Track for OpenTrack vs VoidLink

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Smart Head Track for OpenTrack

Transform your iPhone or iPad into a head tracker for PC games. Control your in-game camera by moving your head, eliminating the need for expensive hardware. Enjoy precise calibration and a seamless setup for an immersive gaming experience.

Highlights
  • Head tracking for PC games
  • Uses phone's front camera and ARKit
  • Compatible with FreeTrack/TrackIR games
  • Easy WiFi or USB setup
  • Independent axis calibration
  • Simulation mode for preview
  • Power saving options
Features
Read full description

Smart Head Track — Head Tracking for PC Games, No Hardware Needed Turn your iPhone or iPad into a head tracker. Move your head to control your in-game camera in flight sims, racing games, truck simulators, and more — replacing expensive hardware like TrackIR with your phone's front camera and ARKit. WORKS WITH YOUR FAVORITE GAMES Compatible with any PC game supporting FreeTrack or TrackIR protocol: • Microsoft Flight Simulator • Digital Combat Simulator (DCS) • Euro Truck Simulator 2 / American Truck Simulator • IL-2 Sturmovik • Star Citizen • Assetto Corsa • …and hundreds more EASY SETUP Connect to OpenTrack (free, open-source) on your PC via WiFi or USB. Enter your PC's IP address, tap Calibrate, and start tracking in under a minute. On Your PC: 1. Download and install OpenTrack: https://git.io/JUs2U 2. Set Input to "UDP over network" 3. Set Output to "freetrack 2.0 Enhanced" 4. Ensure port 4242 is open on your firewall On Your Phone: 1. Launch Smart Head Track and enter your PC's IP address 2. Align your face and tap Calibrate 3. Press Start on both the app and OpenTrack PRECISE CALIBRATION Adjust each of the 6 axes (X, Y, Z, Yaw, Pitch, Roll) independently. Per-axis sensitivity, inversion, and offset controls let you dial in exactly the feel you want. SIMULATION MODE Preview your tracking in a virtual 3D cockpit before connecting to your PC — perfect for testing your calibration settings. BUILT FOR LONG SESSIONS • Power Save — Dim the camera view, hide overlays, or switch to minimal UI while tracking continues • Connection Monitor — Get notified if the link to OpenTrack drops so you can troubleshoot quickly AR FACE OVERLAYS Pilot helmets, sunglasses, combat gear, and more — add fun overlays to your camera feed while tracking. FREE & PRO The core tracking experience is free with a daily time limit. Unlock unlimited tracking and all face overlays with a one-time Pro purchase. CONNECTIVITY • WiFi: UDP over your local network (default port 4242) • USB: Direct cable connection via companion desktop app • iPad: Full landscape orientation support Privacy Policy: https://www.tinacinc.com/SmartHeadTrack/privacy_policy.html

About

VoidLink

This app enhances game streaming performance on iOS devices with features like HDR support and picture-in-picture mode. It offers advanced tools for drawing, external controller customization, and on-screen widgets for a tailored gaming experience.

Highlights
  • Enhanced streaming performance
  • HDR and YUV 4:4:4 streaming
  • Picture-in-picture mode
  • Drawing toolkit with pressure mapping
  • External controller mapping
  • Advanced touch and on-screen widgets
  • Motion control mapping
Features
Read full description

VoidLink is a project developed & maintained by Sunshine - Moonlight game streaming community players. After long term development and iterations, it has been refined into a powerful and feature rich game streaming tool. More details about VoidLink including our community support is available on the app support web page. Key Features of VoidLink 1. Better performance - VoidLink's standard video rendering pipeline delivers unparalleled streaming performance and reference-grade HDR accuracy. Check our app support web page for details. - Supports YUV 4:4:4 streaming (requires device hardware decoding). - Picture‑in‑picture mode supported (iOS15+) —stream in the background without interruption. 2. High-performance frame-interpolated streaming with HDR support: - Supports stable 60 → 120 FPS frame-interpolated streaming on at least A15 and newer devices 3. Drawing Toolkit: Toolkit built for drawing: better stroke transmission, pro-level pressure curve mapping, double-tap and squeeze shortcuts, exclusive on-screen buttons. (Basic stylus support remains available without purchasing the Drawing Toolkit) 4. External controller support - Radial menu and global controller navigation, covering 95% of app settings and operations for gamepad streamers. Enjoy a handheld-like experience without touching the screen! - Super fun! VoidLink brings the first-ever [Gamepad Visual Feedback Overlay] to the game streaming community. - Specify controller mapping as Xbox360 or DualShock 4. - User-defined controller mouse mode. - User-defined gyro toggle & hold button. - Controllers can be connected anytime during streaming. - DS4 Gyroscope mapping. 5. Advanced touch support - Smooth, reliable multi‑touch passthrough. - The app introduces a multi‑Touch game fine‑tuning feature for games with native mobile UI on PC. - Simulated mouse click, double click, right‑click, drag, etc., with adjustable pointer sensitivity. 6. Powerful on-screen widgets - Button widget includes: controller, keyboard, mouse, gyro control, functional (settings menu, soft keyboard, etc.) - Supports grouping, layering, collapsing, and expanding on-screen widgets. - Widget group is able to import complete layouts for quick reuse. - Supports combo buttons, button macros, button+touchpad hybrid widgets - Touchpad widget that enables mobile style gaming. - Auto tap timer for each button widgets - Visual and haptic feedback supported (requires device with vibration motor). - Customize on-screen widget & layout—adjust size, shape, border, transparency, sensitivity, labels, and more. - Import/export on-screen widget layouts for sharing configurations across devices. 7. Powerful motion control - Directly maps built-in gyro or external gamepad gyro to mouse or controller stick, no need for third party PC software for motion control mapping - Works with on-screen gyro control button “GYRO” & “GYROPAUSE” or user-defined physical controller buttons. 8. Haptic engine selection (iOS 13+) - Auto: rumbles iPhone when controller does not support rumbling. Able to rumble iPhone when using on-screen widget control while no physical controller is connected. - swap rumbling left & right handle motor on controller Note: external controller rumbling supported on iOS 14+. 9. Microphone redirection - Support for microphone redirection with Sunshine-Foundation. 10. Changing bitrate upper limit without disconnecting - Bitrate upper limit can be adjusted without disconnecting when working with Sunshine-Foundation. Note: check out our technical support page for more details about Sunshine-Foundation 11. Full portrait‑mode support - Streaming content and on‑screen widgets adapt to portrait orientation: automatic resolution and widget layout adjustment 12. External display support: duplicate or external display only

Screenshots

Smart Head Track for OpenTrack4 screens
VoidLink4 screens

Verdict

The call

The clearest difference is price: Smart Head Track for OpenTrack at Free against VoidLink's $1.49. VoidLink's advantage is rating (4.6 vs 3.2) and review sentiment (86% vs 63%). On ratings volume, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Smart Head Track for OpenTrack is free to download; VoidLink costs $1.49 up front. Smart Head Track for OpenTrack sells 1 one-off in-app purchase and VoidLink sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

VoidLink holds the better App Store score, 4.6 against 3.2. Both are backed by a comparable volume of ratings — 39 and 95 respectively. Written reviews point the same way: 63% of Smart Head Track for OpenTrack's written reviews are positive against 86% of VoidLink's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 21, 2026 and October 28, 2026 respectively.

Scorecard6 real differences · 5 level
Smart Head Track for OpenTrack versus VoidLink: the parameters behind the verdict, then further details
ParameterSmart Head Track for OpenTrackVoidLink
PriceFree — better$1.49
Rating3.2 (39 ratings)4.6 (95 ratings) — better
Positive reviews62.9% of reviews86.5% of reviews — better
Number of ratings3995 — better
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#110 — better
DevicesiPhone, iPadiPhone, iPad, iPod, Apple TV — better
Requires iOS17.014.0 — better
Further details — not scored
Size103 MB14 MB
Age rating4+12+
DeveloperTINAC Inc.伟敏 张

Customer experience

Smart Head Track for OpenTrack

All ratings37 ratings
Positive48.6%
Neutral10.8%
Negative40.5%
Written reviews70 reviews
Positive62.9%
Neutral5.7%
Negative31.4%

VoidLink

All ratings95 ratings
Positive92.6%
Neutral1.1%
Negative6.3%
Written reviews96 reviews
Positive86.5%
Neutral3.1%
Negative10.4%

Bugs and requests

Smart Head Track for OpenTrack

Reported bugs

10 issues
  • App crashes when switching to USB
  • USB connection not working
  • Tracking is lost easily
  • Buggy tracking performance
  • Headtrack exe won't start after Windows reinstall
Show 5 more
  • View is all over the place
  • Small movements result in track loss
  • Glitching and spamming in-game camera
  • Center position not staying consistent
  • Windows 10 won't open port

Requested features

10 requests
  • Allow choice of camera on phone
  • Background mode for headtracking
  • Delay on re-centering
  • Automatic re-center feature
  • Wired/USB connection support
Show 5 more
  • Support for landscape mode
  • Change sensitivity option
  • Improve low light performance
  • More detailed setup instructions
  • Video tutorial for setup

VoidLink

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Smart Head Track for OpenTrack

One-time1
  • Pro Upgrade$8.99
1 purchases

VoidLink

One-time1
  • Drawing Toolkit$5.99

Questions

Is Smart Head Track for OpenTrack free?
Smart Head Track for OpenTrack is free to download, with in-app purchases available.
Is VoidLink free?
VoidLink costs $1.49, and also offers in-app purchases.
Which has better reviews, Smart Head Track for OpenTrack or VoidLink?
VoidLink is rated higher. Smart Head Track for OpenTrack averages 3.2 out of 5 from 39 ratings, while VoidLink averages 4.6 from 95 ratings.
Do Smart Head Track for OpenTrack or VoidLink have ads?
Neither Smart Head Track for OpenTrack nor VoidLink shows ads.
Which is updated more often, Smart Head Track for OpenTrack or VoidLink?
Smart Head Track for OpenTrack ships an update weekly, and VoidLink weekly. Most recently, Smart Head Track for OpenTrack was updated on October 21, 2026 and VoidLink on October 28, 2026.

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