Recall. The chain asks what comes next. • Recall in DRILL: at each position the loop stops and asks which move is next, from the exits the position really has. Get it right and it plays on; miss and it shows you, then plays it. A rep with a miss in it doesn't count. • Today: every recall rep is a review. A chain you know comes back in one day, then three, then longer; a chain you missed comes back tomorrow. Drill's course on the launcher says what's due today and your streak of days. • One reminder a day, at the hour you pick. Off until you turn it on. • The rook has detents: a tick every four degrees under your thumb, a click as each merlon comes round, and it purrs as a flick runs down. • Privacy: a switch each for crash reports and anonymous usage statistics, at the bottom of the first screen.

Drill. Pick a chain, and rep it till it's yours. • DRILL is the new middle course: a sequence of moves on a loop, with a rep counter and a goal of 5, 10 or 25. Half speed, quarter speed, mirrored, step by step. • Five classics on the shelf, from a two-move hip bump sweep to the long one from the feet to the choke. • Make your own: from the trail you walked in Helm, from any two positions, or from the exchange you just watched in Roll. A chain is a link — send it to a training partner. • Drill in your room: the chain going round on the AR mat, at full size. • Handles moved into Helm: one button, and the body is the menu. • A new front door: a glass rook you turn to choose a course, with Find on top. • Roll has a Flow button that takes everything off the picture but the pair.

Put the roll in your room. Point the phone at the floor, tap, and the pair are there at full size. • AR: a three-metre mat or the cage, on the floor or the table. Pinch to scale, drag to move. The camera never leaves your phone. • Helm lays every move out at once, as a grid of cards. • The referee's reset puts both back on their feet, centre of the mat. • Phones on older graphics drivers get their frames back. • Crashes report themselves now, so they get fixed.

The pair are drawn on the GPU now: real bodies, real light, sixty frames a second. • Roll in the academy, a real gym photographed in the round. The dark room stays. • Shonen, a new look for the pair, inked like a manga. It comes with the app. • The roll has a replay camera and a strip that winds back the last ten seconds. • Helm opens on the feet, and a busy position folds its moves into groups. • Light, dark or automatic: a theme button in the settings fan. • A frame-rate gauge in the settings fan. • Counter is retired.