What is telemetry overlay software?

Telemetry overlay software takes data recorded by a GPS device, sports watch, or vehicle data logger — speed, heart rate, cadence, power, G-force, lap time — and overlays it as live gauges on a video file. The output is a video with the data burning in frame by frame, synced to what happened on the road, trail, or track.

What is the best free telemetry overlay software?

For sports (cycling, running, skiing): Stamptivity Overlay — free, browser-based, accepts GPX and FIT files. For motorsport: RaceRender's free tier (watermarked). For GoPro GPMF specifically: GoPro Quik (free, no watermark, but limited gauge control).

What is the difference between GPS overlay and telemetry overlay?

GPS overlay typically refers to overlaying location-based data (speed, map, elevation) from a GPS device or watch. Telemetry overlay is a broader term covering any sensor data — including OBD-II engine data, G-force, steering angle, and lap timing — often used in motorsport contexts. In practice, the terms are used interchangeably for sports video content.

Does Stamptivity support power meter data?

Yes, when you load a FIT file that contains power data (from a Garmin paired with a power meter, for example), the power channel is available. Stamptivity Overlay reads the power field from FIT files. Power is not available via GPX format.

What telemetry overlay software works on Mac?

Stamptivity Overlay (browser, any OS), Garmin VIRB Edit (macOS app, no longer maintained), GoPro Quik (native Mac app), and Telemetry Overlay (paid macOS app). RaceRender and Harry's LapTimer (iOS) are platform-limited.

Best Telemetry Overlay Software in 2026 — Sports & Motorsport

Telemetry overlay software converts raw sensor data — GPS coordinates, heart rate, speed, cadence, power, G-force — into live gauges that play in sync with a video. The result is content where viewers can see exactly what happened, frame by frame, rather than just watching.

The tools available in 2026 range from free browser apps to professional motorsport software. Here's how they compare.

Sports Telemetry (Cycling, Running, Skiing, Hiking)

For athletes using GPS watches and cycling computers, the data source is typically a GPX or FIT file from Garmin, Wahoo, Polar, Coros, or a phone tracking app. The key data channels are:

Speed / pace — the primary overlay metric
Heart rate — requires a paired HRM in the FIT file
Cadence — cycling or running cadence from a sensor
Power — from a power meter (FIT files only)
Elevation — GPS altitude
Moving map — GPS route trace

Stamptivity Overlay — Best Free Option for Sports

stamptivity.app/overlay · Free · Browser · No install

Accepts GPX and FIT files from any GPS device. All core sports data channels are supported: speed, heart rate, elevation, cadence, power (via FIT), and GPS map. Drag gauges anywhere on the canvas, sync with a time offset slider, export MP4 at full resolution with no watermark.

Works on Windows, Mac, and Linux with no install. The only browser-based telemetry overlay tool that's completely free with no watermark.

Try free →

Garmin VIRB Edit — Free Desktop, Garmin-Optimised

Free desktop app for Windows and macOS. Originally built for Garmin's VIRB cameras but works with any video and GPX/FIT source. No longer actively developed but still functional. Best for users who prefer offline desktop processing.

Telemetry Overlay (App) — Best Paid Sports Option

~$40 one-time · macOS + Windows · Desktop

A polished desktop application that supports GoPro GPMF natively (no extraction step), Garmin FIT, and multiple camera sources. High-quality gauge rendering with smooth animations. Active development. Best choice for cyclists and runners who produce regular content and want the highest output quality.

GpxOverlay — Most Gauge Types

Free tier / ~€4/month · Browser

29+ gauge types including sport-specific presets for skiing, cycling, aviation, and nautical use. Free tier adds a watermark and limits export resolution. Paid plans unlock full quality.

Motorsport Telemetry Overlay

Motorsport has more complex telemetry requirements: G-force, steering angle, throttle position, brake pressure, lap time, sector splits, OBD-II engine data. The tools that handle this well are different from sports GPS tools.

RaceRender — Best for Track Days

Free tier (watermark) / ~$40 · Windows

RaceRender is the most-used tool for amateur motorsport overlays. It handles GPS data from dedicated track loggers, OBD-II ports, and standard GPS watches. Motorsport-aesthetic gauge library. The free tier adds a watermark; the paid version does not.

Limitations: Windows only.

Harry's LapTimer — Best for iOS Motorsport

~$12–$40 · iOS only

Records GPS and OBD-II data simultaneously with iPhone video. Built specifically for lap timing and track sessions. Exports finished video directly from the app. iOS-exclusive.

AiM Sports / Race Technology — Professional Grade

Paid (hardware + software) · Windows

Professional motorsport data loggers with matching overlay software. Used in club racing and semi-professional motorsport. Significant hardware investment. Not relevant for cyclists or casual track day drivers.

Full Comparison: Sports vs. Motorsport

Tool	Category	Price	Platform	GPX/FIT	OBD-II	G-force	Watermark
Stamptivity Overlay	Sports	Free	Browser (any OS)	✓	✗	✗	None
Garmin VIRB Edit	Sports	Free	Win + Mac	✓	✗	✗	None
Telemetry Overlay	Sports	~$40	Win + Mac	✓	✗	✓	None
GpxOverlay	Sports	Free / Paid	Browser	✓	✗	✗	Free tier
GoPro Quik	Sports	Free	Win + Mac + Mobile	GPMF only	✗	✗	None
RaceRender	Motorsport	Free / ~$40	Windows	✓	✓	✓	Free tier
Harry's LapTimer	Motorsport	~$12–$40	iOS	✗	✓	✓	None

Which Tool for Which Activity?

Road and gravel cycling → Stamptivity Overlay. FIT file from Garmin or Wahoo, speed + HR + cadence + power + map. Free, no install.

Trail running → Stamptivity Overlay. Pace + HR + elevation chart. Load the FIT from Garmin or Polar.

Skiing / snowboarding → Stamptivity Overlay. Speed + altitude + map. Use the ski mode FIT from a Garmin Fenix or Coros Vertix.

GoPro users (casual) → GoPro Quik. Reads GPMF directly, zero setup, sufficient for basic speed overlay.

GoPro users (serious content) → Telemetry Overlay. Native GPMF support, high quality, worth the $40 for regular creators.

Track days / karting → RaceRender (Windows) or Harry's LapTimer (iOS).

All sports, all platforms, zero cost → Stamptivity Overlay.

Dashware: The Tool That Started It All

Dashware was the original free telemetry overlay tool, released around 2010 and acquired by GoPro in 2016. It popularised the format — particularly among cyclists. GoPro discontinued it in 2022, and it no longer works on modern systems.

See the complete Dashware alternatives guide for the full history and replacement options.