Power match
See whether your release speed is slightly low, matched, or slightly high for the disc you selected. A driver and a midrange should not be judged the same way.
Disc golf analysis app for iPhone
Analyze your release.Throw farther.
ThrowLab measures power, disc angle, and launch angle against the disc you threw, then turns the results into practical coaching and Disc Fit guidance.
- Coaching for the next throw
- Works in a net or on the field
- Your videos stay on your iPhone
POWER MATCHSlightly low
DISC ANGLEHyzer
- Coaching for the next throw
- Works in a net or on the field
- Your videos stay on your iPhone
Power matchDisc angleRelease pathPredicted flightDisc fit
How it works
From slow-motion video to a next-throw plan.
- 01
Choose your disc and throw style
Search for the disc you threw, then select RHBH, RHFH, LHBH, or LHFH.
- 02
Upload a slow-motion side view
Use landscape video trimmed from shortly before release until just after the disc leaves the frame.
- 03
Find the disc in mid-flight
Scrub until the disc is out of your hand, then zoom and center it completely inside the circle.
- 04
Review the throw
See your release breakdown, predicted early flight, and one clear thing to try next.
What ThrowLab analyzes
Three readings that explain your release.
ThrowLab analyzes a slow-motion clip to show whether your speed fits the disc, how the disc is angled at release, and whether it is traveling upward, flat, or downward. Then it explains how those pieces are likely to shape the flight.
Disc angle
See whether the disc leaves your hand on anhyzer, slightly anhyzer, flat, slightly hyzer, or hyzer. ThrowLab interprets the angle for your throwing side and throw style.
Release path
See whether the disc is traveling upward, slightly upward, flat, slightly downward, or downward immediately after release.
Scored to the disc you threw
Same angle. Different disc. Different flight.
The same release can produce a very different flight with an overstable driver than with an understable midrange. ThrowLab uses the selected disc’s speed, glide, turn, and fade so the feedback fits the mold in your hand.
9Speed
3Glide
0Turn
4Fade
When power is slightly low or high, Disc Fit suggests a speed or stability profile that may suit the throw better. When power matches, the coaching stays focused on the release.
Get the clearest analysis
Give ThrowLab a clean view of the disc.
A clear side view helps ThrowLab follow the disc from release through its early flight.
✓Slow motion240 fps is recommended. 120 fps is supported.
✓Landscape videoGive the disc room to travel across frame.
✓Side viewFilm roughly perpendicular to the intended line.
✓Trimmed to the throwStart shortly before release and end after the disc exits.
About accuracy: Results are training estimates, not launch-monitor measurements. Heavy blur, poor lighting, an obstructed disc, or the wrong camera angle can make the disc harder to track. When that happens, ThrowLab may ask for a clearer clip.
Throw history
Track what changed from one throw to the next.
Every analysis is saved on your iPhone. Compare releases over time and see whether the change you made actually carried into the next throw.
FirebirdThrow 01Slightly low · Hyzer · Slightly upward
BuzzzThrow 02Matched · Slightly anhyzer · Flat
Common questions
Questions players ask before analyzing a throw.
What does a disc golf analysis app measure?
ThrowLab estimates power match, disc angle, and release path from slow-motion video. It combines those readings with the selected disc’s flight ratings and throw style to describe the likely flight and suggest what to change next.
What do hyzer, flat, and anhyzer mean in disc golf?
On a hyzer release, the disc’s outer edge—the edge farthest from your body—is lower than the inner edge. On an anhyzer release, the outer edge is higher. A flat release sits between them. ThrowLab interprets the angle using your throwing side and whether you throw backhand or forehand.
Does ThrowLab work for forehand and left-handed throws?
Yes. ThrowLab supports right-hand backhand, right-hand forehand, left-hand backhand, and left-hand forehand. Your selected throw style helps the app interpret hyzer and anhyzer correctly and describe the expected flight direction.
Can I use ThrowLab when throwing into a net?
Yes. ThrowLab reads the release and early flight, so the disc does not need to land on camera. Keep the disc visible for several frames after it leaves your hand.
Do I need a radar gun, sensor disc, or stickers?
No. ThrowLab uses slow-motion video from your iPhone. You select the disc from your bag and center it in one mid-flight frame before analysis.
Why does the selected disc matter?
Different molds are designed for different speeds and flight shapes. ThrowLab uses speed and category for power matching, while turn and fade help explain the predicted flight and disc-fit guidance.
Is ThrowLab analyzing my body mechanics?
No. ThrowLab is focused on the disc at and immediately after release. It does not score reach-back, footwork, brace, or hip rotation.
Are videos uploaded to a server?
No. Throw videos are analyzed on your iPhone and are not uploaded for analysis. ThrowLab does not require an account.
How much does ThrowLab Pro cost?
ThrowLab Pro is $4.99 per month or $39.99 per year after a 3-day free trial. Apple charges your Apple Account when the trial ends unless you cancel at least 24 hours before renewal.
On-device analysis
Your throw analysis stays on your iPhone.
Your throw video is analyzed on your iPhone and is never uploaded for analysis. No ThrowLab account is required.
ThrowLab Pro for iPhone
Stop guessing what happened at release.
Try every analysis feature free for 3 days. Continue for $4.99/month or $39.99/year. Your throw videos stay on your iPhone.
Cancel at least 24 hours before the trial ends in Settings under your Apple Account and Subscriptions.