Cue Angles

Cue Angles is an aiming trainer for pool. The physics, the lessons, the drill layouts and every word of text live inside the app. No ads, no network, no account, and nothing to buy: every part of the app is open from the first launch. THE NUMBERS ARE REAL Every shot is worked out by the app's own physics before the animation starts: balls of 57.2 mm, pocket mouths of 114 mm, a 2 ms integration step, elastic contact along the line of centres, throw from friction between the balls, squirt from the tip offset and cushions that mirror the line. The same shot always gives the same path, so a miss can be split into the parts that caused it. A BREAKDOWN, NOT A VERDICT After every shot you get the aim error in degrees with its sign, the contact point in millimetres against the one you needed, how far from the centre of the pocket the object ball passed, and which of aim, throw, squirt or cushion took the angle away, each in degrees. The ideal path is drawn over the one you played. Those numbers are read out of the shot you just played, not estimated afterwards. SIX MODULES, THIRTY LESSONS Cut angles and the ghost ball; contact point and the tangent line; rail reflection; side spin and throw; position and the 30 degree rule; combinations, kisses and safeties. Each module has five lessons with diagrams drawn on the same table you play on, and all six are open from the first launch. 120 DRILLS IN FOUR LEVELS Twenty layouts per module, cut into four levels of five. Level 1 stays under a 15 degree cut; level 4 goes to 70 degrees, adds two cushions and asks where the cue ball finishes. A drill is passed by potting the named ball in the named pocket inside the shot limit with the aim inside the level's tolerance - 2.5 degrees on level 1, 0.8 degrees on level 4. The next level opens after four of the five below it are passed. EVERY MISS COMES BACK Miss a drill and it returns tomorrow. Pass it first time and the gap grows to three days, then seven, sixteen and thirty-five. Two clean passes at the last two intervals retire it. Review collects what is due today, oldest miss first, 8, 15 or 20 drills a session as you choose. ANGLE LAB A table with no task: place the balls where you want, pick a pocket, read the cut angle, the contact point and how far the cue ball comes off its own line, and keep up to 20 of your own layouts on the phone. MADE FOR ONE HAND Drag the aim line on the cloth, then trim it a twentieth of a degree at a time. Pick the tip position on a 5x5 or 7x7 grid, the cue elevation and the power. Tables of 7, 8 or 9 feet, millimetres or inches, three cloth colours and a left-handed layout that mirrors the whole panel. WHAT YOU ARE COUNTED ON Shots and pots by level, average and best aim error, average aim error by cut angle band, which way the misses went, drills passed by module, a 90 day activity calendar and a plain text export of all of it, written into the app on your phone. NOTHING IS FOR SALE There is no store in this app, no price anywhere in it and no payment code in it. There is no in-game currency either: nothing to collect, nothing to spend, nothing to win and nothing to risk. Hints have no daily limit. OFFLINE AND PRIVATE The app has no network code at all. Nothing is collected, nothing is sent anywhere, no advertising identifier is read, and it asks for no permissions: no camera, no microphone, no location, no contacts, no notifications.

First release.