See what your ball actually did.
Your iPhone measures every throw, from the release to the pins.
10 throws free, then $14.99 once.
- Entry Angle
- 3.9°target 4–6
- Entry Board
- 16.3boardtarget 17–18
- Breakpoint
- 5.8boardat 38.6 ft
- Breakpoint Distance
- 38.6ft
- Board at Arrows
- 13.3board
- Launch Angle
- 2.8°
- Speed
- 18.7mph
- Hook
- 10.5boards
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Shot result
Each throw is drawn on the lane seconds after it hits the pins.
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Metrics
The numbers sit under the line, with the pocket targets marked.
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Session
Each session shows how consistent you were from throw to throw.
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Stats
Stats show where you enter the pins and which ball finds the pocket most.
Every throw comes back with seven numbers.
A typical right-handed pocket shot.
Everything runs on your iPhone. No account, and nothing is uploaded.
Price
10 throws
free to start.
$14.99
once for unlimited throws, with no subscription.
Questions
Where does the phone go?
Behind the approach on a small tripod or the ball return, looking straight down your lane with the foul line and the pins in frame. Don't move it between throws.
Which iPhones work?
Any iPhone on iOS 17 or later.
What counts as a free throw?
Each throw TrueLine analyzes, recorded live or imported. After 10, a one-time purchase of $14.99 unlocks unlimited throws.
Does it work for left-handed bowlers?
Yes. Set your bowling hand in Settings and the boards are counted from your side.
Is my video uploaded?
No. Everything stays on your phone. See the privacy policy.
Try it on your next 10 throws.