Joker Orbit

Joker Orbit is an offline-first dual-angle layout studio for league bowlers, pro-shop apprentices, high-school teams, and dual-angle students. Map pin and mass bias on a live top-view ball disc before the bit ever touches the coverstock—not a scoresheet, not season stats, and not a ball scrapbook.

LIVE LAYOUT WORKBENCH
Enter PAP coordinates, pin-to-PAP, drilling angle, VAL angle, and pin buffer. Watch pin, CG, and mass-bias markers update on an interactive ball diagram with finger and thumb hole preview. As you move the sliders, the pin–MB relationship orbits through legal drill zones with flare-potential and static-balance cues so you can see shape before you commit.

BOWLER FIT CARDS
Save dominant hand, measured PAP X/Y, span, and pitch notes. Four richly seeded profiles—teen varsity, house-shot regular, sport-shot grinder, and two-hander—are ready on first launch so you can practice immediately.

SEEDED RECIPE LIBRARY
Start from full-geometry recipes already filled in: Benchmark, Strong Continuous, Long-and-Strong, Control, and Flip Hybrid. Each includes a short rationale and the expected shape on medium oil so dual-angle theory becomes a shop-ready map.

BALL SPEC SHELF
Demo spheres ship with the app (symmetrical benchmark, strong asym, pearl length ball), storing RG, total differential, intermediate differential, and preferred drill strength. Add and edit your own arsenal fully offline.

SAFE-ZONE ENGINE
Color bands on the disc flag pin-buffer risk, thumb-to-pin clearance issues, and static-balance warnings when a layout could mean thin walls or illegal after-drill weight—plain visual guidance, not cryptic error codes.

COMPARE AND EXPORT
Weigh flare versus control in side-by-side compare on the same ball disc. Share a plain-text or CSV layout sheet via the system share sheet with bowler, ball, PAP, angles, pin buffer, and hole notes—wired end-to-end.

LEARN AS YOU DRILL
An illustrated dual-angle glossary covers PAP, VAL, pin buffer, mass bias, flare potential, and symmetrical vs asymmetrical cores, with diagram callouts linked from workbench tooltips. Guided onboarding gets you productive fast.

PRIVACY BY DESIGN
Offline-only storage. No account. No ads network. No analytics SDKs. Privacy Policy and Terms live in Settings every session. An optional home widget shows the active ball name plus pin-to-PAP and drilling/VAL angles as a read-only snapshot—zero notifications, zero foreground services.

Turn dual-angle theory into a pin-and-mass-bias map your pro shop can trust, on the bench or on the bus, with no signal required.

Recent changes:
Smaller reading tweaks on the workbench, the glossary, and the home-screen widget.