Accelab 2.2 adds a third experiment to both methods: circular motion. ⋅ Circular Motion: with the camera, film a marker going round from straight above, and Accelab fits the circle and gives you the marker's x, y and angle against time, with the radius. With the sensors, lay your iPhone flat on a turntable, and Accelab records its angular velocity and its centripetal and tangential acceleration, with ω² in the export, ready to plot a against ω². ⋅ Choose the experiment first, then the method. Each method's tile shows the graph you will plot and the columns of data you get. ⋅ Export by graph: choose the graph you want, and Accelab exports just its two columns, ready to paste into Desmos. All Data and a custom choice of columns are still there. ⋅ Past Runs lists each run by its experiment, with the method and date underneath.

Accelab 2.1 teaches the Camera method a second experiment: the projectile. ⋅ Projectile: choose Projectile when you start the Camera method, film an object in flight, and Accelab gives you its x and y position against time, measured from where it started. Check the points, then export them as CSV or copy them into Desmos, like any other run. ⋅ Level your iPhone: before you film a projectile, Accelab uses the iPhone's sensors to help you set it level, and the recording screen shows whether it still is. ⋅ Tracking now tells you when it loses the cart or the object. Track again from that frame, or mark the rest by hand. ⋅ Past Runs shows what each camera run filmed: Air Track or Projectile.

Accelab 2.0 adds a whole new way to measure: the camera. ⋅ Camera method: film the cart with your iPhone, or choose a video you already have, and Accelab follows the cart through the video. Trim the clip, mark any known length for scale, then track the cart automatically or mark it by hand. ⋅ The original way of measuring, with your iPhone attached to the cart, is still here as the Sensor method. Choose your method when you open the app. ⋅ Past Runs: every run you finish is saved automatically, so you can rename it, export it again or delete it later. ⋅ More ways to get your data out: preview it as a table, copy it straight into Desmos, and for camera runs, save the video and a photo with every tracked point marked on it. ⋅ A refreshed design, with haptic feedback throughout. ⋅ The angle step now pauses and tells you when your iPhone is lying flat.

⋅ Minor bug fixes.