Auto-Count Vape Taper

People who vape and want to cut down or quit pay for this today: Puff Count reported about $40,000 a month and a million users, and Quit Vaping sells a $99.99-a-year plan to over a million users. The clearest repeated complaint is that you have to tap your phone after every puff to make the tracker work - users describe the chore, ask for Siri or widgets, and one successful quitter resorted to a separate Apple Watch tally app and typed the numbers in by hand for eight months. The other repeated complaint is billing: a promised 7-day trial that was really 3 days, being locked out of the app after the trial, and a paid-only quit plan; billing is a review topic on the top-rated competitor. The hard part is that automatic counting is not vacant - Puff Count：Quit Vaping Tracker already advertises camera-based hands-free puff detection - so the only possibly novel wedge is phone microphone/motion detection, which is unproven in practice, and the help is already free in places (Quit Tracker; LastPuff markets free even though its listing carries premium IAPs), so a flat one-time price is not the whole answer. Before building anything, put a testable microphone/motion auto-count detector in front of 25 people who vape and have paid for a quit app or used a watch tally app: have each count puffs manually for three days while the detector runs, then compare how often the detector was right and whether they would pre-pay $24.99 for a lifetime unlock. Kill it if fewer than 8 of 25 pre-pay, or if the detector disagrees with their manual count on more than about 1 in 10 puffs.