Image and video decision
Golf Shot Tracer
A capable developer can build a limited desktop/CLI shot-tracing tool using open libraries in a few weeks, but reproducing the polished, GPU-accelerated mobile one-tap app and distribution is substantially more work and UX engineering, so keep paying for the full mobile experience unless you only need a narrow desktop workflow.
Visit website↗Built by Emmett Deen, who ships 3 products in this index
Not priced
No pricing page we fetched carried a figure, so there is nothing to compare against. The build side is still real.
$100one-off60 h to build
$0/mo1 h/mo upkeep
No published price to break even against.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Golf Shot Tracer alternatives, with the arithmetic →
What a replacement has to do
- Import/record video → initialize ball location → run frame-by-frame tracking → render trajectory overlay frames → encode/export shareable video
What it still won’t have
- Polished native mobile UI and App Store / Play Store distribution
- GPU-accelerated, on-device inference optimizations for mobile
- One-tap UX with robust touch-to-track experience and presets
- Built-in social export integrations and share shortcuts
- Edge-case camera formats and wide codec/device support testing
What remains hard
- Product polish and ongoing maintenance
First-year cost
No published price
Golf Shot Tracer does not publish a price we could read, so there is nothing to compare against. What building costs is below.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal desktop/video-tool replacement in Python: use moviepy for decoding/encoding, OpenCV for frame I/O and tracking, and NumPy/SciPy for trajectory smoothing. Core features in scope: (1) open/import mp4, (2) UI or CLI step to click/tap initial ball position on a frame, (3) per-frame tracking using an OpenCV tracker with fallback re-detection, (4) compute a smoothed 2D trajectory and render colored glow overlay per frame, (5) encode/export mp4 at original resolution and frame rate, (6) include basic presets for color/width and a preview. Explicitly out of scope: mobile native app, App Store/Play Store packaging, GPU-accelerated on-device NN optimization, social sharing integrations, and advanced UI polish. Include error handling for unsupported codecs and missing frames, unit tests for the tracking/render pipeline, and a small end-to-end integration test that verifies import → track → export.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 5 cited sources+3
- Evidence score60
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 5
Every page the run actually retrieved.
- official productFairwayFX - Pro Shot Traces for Your Golf Videos
- official pricingFairwayFX Pricing
- official docsFairwayFX Features
- open sourcem1guelpf/auto-subtitle
- open sourcehacksider/Deep-Live-Cam
Integrity checks
What held up, and what did not.
