Comparison

Thermals vs TrackOSC

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

Head to head
About

Thermals

Monitor your device's thermal state and processor activity to diagnose performance issues. Understand why your phone might be running slowly, charging slowly, or have reduced brightness due to overheating. Export data for further analysis with other development tools.

Highlights
  • Displays device thermal state
  • Shows active processor count
  • Monitors device uptime
  • Troubleshoots performance issues
  • Helps diagnose slow charging
  • Identifies brightness limitations
  • Exports raw data for analysis
Features
Read full description

Phone running slowly, charging slowly or low brightness? See if your device is overheating using Thermals. Thermals displays your device’s thermal state, as well as how many processors are active on your device and its uptime, as reported by iOS. Thermals helps troubleshoot: • Poor performance — iOS reduces processor speed and potentially disables processors temporarily when the device is hot. • Slow charging — battery charging causes a lot of heat and iOS can limit charging speed to reduce the additional heat that might make a device too hot. • Low maximum brightness — if your device screen stays dark despite being on full brightness, it could be limited by iOS due to heat. • Manufacturing defects — if not all processors are active when the device is cool and not in low power mode. Your device's thermal state is monitored regularly in the background and recorded in the app (if Background App Refresh is enabled). Open the app or tap the widget to record a data point manually. Export the raw data to file for corroboration with Screen Time, Xcode's Instruments, or other development tools. Also an independent Apple Watch app shows the thermal status, active processors and uptime, and thermal history of your watch.

About

TrackOSC

This app transforms your iPhone into a wireless motion-tracking camera. It streams real-time pose, face, text, and animal tracking data over your local network as OSC messages. All processing is done on-device, ensuring your video never leaves your phone.

Highlights
  • Live tracking overlays (body, hand, face, text, animals)
  • Per-detector toggles for performance
  • Front/back camera support with selfie mirror
  • Portrait/landscape orientation lock
  • Automatic OSC receiver discovery (Bonjour)
  • Hide-video mode for stage use
Features
Read full description

TrackOSC turns your iPhone into a wireless motion-tracking camera. Point it at a person and it streams live tracking data – body poses in 2D and 3D, hand poses, face landmarks, recognised text, animals, people, barcodes, outlines, the horizon and rectangles – over your local network as OSC (Open Sound Control) messages, ready for TouchDesigner, Max/MSP, Processing, openFrameworks, Pure Data, SuperCollider, Unity, or anything else that speaks OSC. All processing happens on-device with Apple's Vision framework. No video ever leaves your phone – only numbers. WHAT IT TRACKS • 2D Body: a 17-joint skeleton in pixels • 3D Body: a 17-joint skeleton in metres – real depth from a single camera, with each joint's pixel position alongside • Hand: 21 joints per hand, up to two hands • Face: the face box, head rotation and jawline contour, and Face Landmarks: the full 76-point constellation – eyes, pupils, brows, nose, lips, jaw • Text: recognised text with its bounding box • Animal: cat and dog boxes, and Animal Pose: full 25-joint cat and dog skeletons • Human: whole-body boxes that keep counting people at distances where pose estimation gives up • Barcode: QR codes and 1D/2D barcodes with position, corners, symbology and payload • Contours: every edge outline in the frame as closed polylines • Horizon: the horizon's angle and a line across the frame • Rectangles: screens, paper, doors – a box plus four corners FEATURES • Live tracking overlays on the camera view, colour-coded per detector • One chip per detector – run just what you need for the best frame rate; 3D Body runs in its own lane so it never slows the others • Front or back camera, with a natural selfie mirror (wire data is never mirrored) • Portrait and landscape, with an orientation lock for phones mounted on tripods and rigs • Automatic discovery of receivers on your network via Bonjour – or type any IP and port • Hide-video mode: tracking overlay only, on black – for stage and installation use • Free, notarised macOS companions – a Receiver with 2D and 3D views, a Recorder that records and replays the stream, a Speaker that reads it aloud, and a Router that turns it into MIDI, Shortcuts, key presses and HTTP – plus open-source receiver examples for Processing, Python, p5.js, TouchDesigner, Max/MSP, Pure Data, openFrameworks and SuperCollider, all from the project page COMPATIBILITY TrackOSC speaks exactly the same OSC wire format as VisionOSC and PoseOSC, so existing receivers and patches work unchanged. The newer detectors arrive as additional messages that older receivers simply ignore. Coordinates are in pixels, origin top-left, with the frame dimensions in every message. PRIVACY No accounts, no analytics, no ads. Camera frames are analysed on the device and discarded; tracking data is sent only to the destination you choose. TrackOSC is open source: https://github.com/JGL/TrackOSC

Screenshots

Thermals4 screens
TrackOSC1 screens

Verdict

The call

The clearest difference is rating: TrackOSC at 5.0 against Thermals's 4.5. TrackOSC also leads on update cadence (fortnightly vs every 3 months) and review sentiment (100% vs 83%). Thermals's advantage is ratings volume (28 vs 2) and chart position (#158 vs unranked). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

TrackOSC holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Thermals has 28 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 83% of Thermals's written reviews are positive against 100% of TrackOSC's.

UpkeepUpdate frequency

Thermals ships an update every 3 months, TrackOSC fortnightly. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 5 level
Thermals versus TrackOSC: the parameters behind the verdict, then further details
ParameterThermalsTrackOSC
PriceFreeFree
Rating4.5 (28 ratings)5.0 (2 ratings) — better
Positive reviews83.3% of reviews100.0% of reviews — better
Number of ratings28 — better2
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#158 — better—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.618.0 — better
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperGeorge GarsideJoel Lewis

Customer experience

Thermals

All ratings28 ratings
Positive89.3%
Neutral3.6%
Negative7.1%
Written reviews30 reviews
Positive83.3%
Neutral6.7%
Negative10.0%

TrackOSC

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Thermals

No in-app purchases

None

TrackOSC

No in-app purchases

Questions

Is Thermals free?
Thermals is free to download, with no in-app purchases.
Is TrackOSC free?
TrackOSC is free to download, with no in-app purchases.
Which has better reviews, Thermals or TrackOSC?
TrackOSC is rated higher. Thermals averages 4.5 out of 5 from 28 ratings, while TrackOSC averages 5.0 from 2 ratings.
Do Thermals or TrackOSC have ads?
Neither Thermals nor TrackOSC shows ads.
Which is updated more often, Thermals or TrackOSC?
Thermals ships an update every 3 months, and TrackOSC fortnightly. Most recently, Thermals was updated on October 19, 2026 and TrackOSC on October 13, 2026.

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