PocketCoach

PocketCoach is your digital bowling coach for your pocket. The app simulates

ball behavior on real oil patterns and instantly shows you the best line,

the right ball from your bag, and concrete tips on how to adapt as the lane

transitions.

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✦ MAIN FEATURES

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➤ Physics simulation

3-phase release model with skid, hook and roll phase. Photo/video

calibrators determine your rotation axis (PAP), ball speed and rev

rate from your own recordings.

➤ Strike optimizer

Tap the standing pins → the app computes the optimal line and shows

board position, target arrow and laydown point. Optional "Optimum"

quick button next to "Throw" — one tap, ready line.

➤ Ball recommendation

From your stored equipment, the app picks the right ball for the

current lane — with a photo from the library. Filter by bag.

➤ Move Coach (lane transition)

After a few throws, the coach shows how to adjust your feet, target

and ball as the lane oils up. Runs live on tap or continuously.

➤ Arsenal Gaps analysis

Which lane conditions does your arsenal cover — and where are the

gaps or overlaps? The analysis places your balls on a scale from

"dry" to "heavy oil".

➤ Ball comparison

Compare several stored balls on the same lane at once — colored

trails + comparison table with every key figure.

➤ Ball library with over 1400 balls

From 11 major brands (Storm, Roto Grip, Hammer, Motiv, Brunswick,

DV8, Track, Columbia 300, 900 Global, Ebonite, Radical), each with

photo and specifications. Optionally updatable from the web on tap.

➤ 92 oil pattern presets

From house patterns to the complete PBA Animal Series (Wolf, Cheetah,

Viper, Chameleon, Scorpion, Shark, Bear) to sport and flat patterns.

Custom patterns can be imported as PDF, JSON or CSV.

➤ Lane condition + oil profile

Adjustable warm-up throws simulate the lane after several squads.

The oil profile shows volume, ratio and oil distribution across

the lane width.

➤ Coach mode "rule of 31"

Optional. Translates pattern length into a recommended target arrow.

➤ Top-down 2D + 3D view

See your ball path from above or in 3D. Stance, target arrow and

board can be dragged directly on screen.

➤ Profiles & equipment management

Multiple players, multiple releases, balls with layouts and bag

assignments — all local on your device, no cloud required.

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✦ CUSTOMIZE THE APP

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• Light or dark theme — switchable in settings

• Metric (km/h, m) or imperial (mph, ft) — independent from the language

• German and English (app-wide switch)

• Tiles can be individually toggled via a quick control

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✦ WHO IS THIS FOR?

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• League bowlers who want to systematically improve their line

• Recreational players interested in the technical side of the strike

• Pros who want to quickly explore pattern adjustments

• Coaches who want to visualize the effect of release parameters for

their players

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✦ PRIVACY

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PocketCoach runs completely offline in normal use. No accounts. No cloud

sync. No tracking. No ads. All your data stays on your phone.

Only when you press the "Update" button in the library picker does the

app fetch the current ball database from a public GitHub repository —

otherwise no network access.

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✦ NOTES

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PocketCoach is a learning and analysis tool, not a replacement for real

on-lane practice. The recommendations are starting points — you decide

what fits your own style.

Languages: German & English.

Completely free. No in-app purchases. No ads.