Comparison

SmoothTrack vs VoidLink

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

Head to head
About

SmoothTrack

Enhance your simulation gaming experience with phone-based head and eye tracking. This app allows for intuitive, 6-degrees-of-freedom head movements to control your in-game perspective without any extra hardware. Seamlessly look around cockpits, check blind spots, or zoom in on details with natural head gestures.

Highlights
  • 6DoF head tracking
  • Optional eye tracking
  • No extra hardware required
  • Works with FreeTrack/TrackIR games
  • Customizable view presets
  • Exaggerated head movements for control
Features
Read full description

SmoothTrack 2.0 uses the head and eye tracking AR capabilities of your phone to provide the simplest and best head tracker for 6 degrees-of-freedom head movements in your sim games. ----- "The best new controller on the market." - Charlie Hall, Polygon Customer reviews: "SmoothTrack just works. Less than 5 minutes to install, setup and fly. Love not being tethered to my desk! 5 stars!!" "This worked perfectly and way better than expected! Totally enhanced my experience with MFS 2020!" --- It's a near magical experience to seamlessly slightly move your head and have your game perspective immediately play along (the movements in the game are exaggerated so that you only have to make slight movements of your head to control the camera). Additionally, since version 2, your eyes are also optionally tracked and will nudge the camera based on where you're glancing on screen! - Simply lean forward to get a closer look at your Flight Simulator cockpit! - Look a bit up to see the overhead panel of your A320! - Simply shift your head a bit to the right to see the direction of the space station you're approaching in Elite: Dangerous! - Look a bit left before a hard left turn in Euro Truck Simulator 2! No headset or extra equipment of any kind is required! Simply set up your device so that it can see your face. Using simple camera gestures, you can shift your perspective in-game. Also, if you want, you can store views (say, a copilot angle, or a cockpit closeup) as Quick Views for easy access later. Your head movements are slightly exaggerated which enables you to look out of a cockpit side window with just a slight movement of your head to the left. Any game that supports the FreeTrack or TrackIR protocol will work with this, including: - Microsoft Flight Simulator - Microsoft FSX - DCS World - Elite: Dangerous - IL2: Sturmovik - Euro Truck Simulator 2 - Kerbal Space Program - ...and many, many others! Email and Discord support is provided if there are any issues (or if you have any ideas for new features!).

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

SmoothTrack4 screens
VoidLink4 screens

Verdict

The call

The clearest difference is price: VoidLink at $1.49 against SmoothTrack's $14.99. VoidLink also leads on update cadence (weekly vs every 4 months) and iOS requirement (12.0 vs 16.0). SmoothTrack's advantage is in-app purchases (none vs 1) and ratings volume (249 vs 82). On rating, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

SmoothTrack costs $14.99 and VoidLink $1.49 up front. VoidLink sells 1 one-off in-app purchase. SmoothTrack asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for SmoothTrack against 4.7 for VoidLink. Both are backed by a comparable volume of ratings — 249 and 82 respectively. Written reviews split almost evenly too, at 86% and 86% positive.

UpkeepUpdate frequency

SmoothTrack ships an update every 4 months, VoidLink weekly. Both last shipped on September 26, 2026.

Scorecard6 real differences · 4 level
SmoothTrack versus VoidLink: the parameters behind the verdict, then further details
ParameterSmoothTrackVoidLink
Price$14.99$1.49 — better
Rating4.7 (249 ratings)4.7 (82 ratings)
Positive reviews85.7% of reviews — better85.5% of reviews
Number of ratings249 — better82
Update frequencyEvery 4 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.012.0 — better
Further details — not scored
Size10 MB24 MB
Age rating4+12+
DeveloperJohn Goering伟敏 张

Customer experience

SmoothTrack

All ratings249 ratings
Positive90.4%
Neutral2.8%
Negative6.8%
Written reviews265 reviews
Positive85.7%
Neutral4.9%
Negative9.4%

VoidLink

All ratings82 ratings
Positive91.5%
Neutral2.4%
Negative6.1%
Written reviews69 reviews
Positive85.5%
Neutral1.4%
Negative13.0%

Bugs and requests

SmoothTrack

Reported bugs

2 issues
  • Tracking issues with certain phone positions
  • Compatibility problems with some devices/OSes

Requested features

3 requests
  • Background mode support
  • Ability to use rear camera
  • Improved UI and customization options

VoidLink

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

SmoothTrack

No in-app purchases

1 purchases

VoidLink

One-time1
  • Drawing Toolkit$5.99

Questions

Is SmoothTrack free?
SmoothTrack costs $14.99, with no in-app purchases.
Is VoidLink free?
VoidLink costs $1.49, and also offers in-app purchases.
Which has better reviews, SmoothTrack or VoidLink?
SmoothTrack and VoidLink are both rated 4.7 out of 5 on the App Store, from 249 and 82 ratings respectively.
Do SmoothTrack or VoidLink have ads?
Neither SmoothTrack nor VoidLink shows ads.
Which is updated more often, SmoothTrack or VoidLink?
SmoothTrack ships an update every 4 months, and VoidLink weekly. Most recently, SmoothTrack was updated on September 26, 2026 and VoidLink on September 26, 2026.

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