FormCheck AI

FormCheck AI, published by Purestrength Limited and previously known as PureStrength, is an AI personal trainer app for the iPhone. It checks a lifter's technique on the three main barbell lifts: the squat, the bench press and the deadlift. It is intended for people who train with weights and want feedback on their form without a coach present, so they can lift more safely and progress in strength.

The user records an exercise video and FormCheck AI analyses it, returning instant feedback on the performance of the lift. For the deadlift it detects shoulder positioning to avoid rounding, checks hip movement and lat and core tightness, and reviews the lockout. For the squat it monitors depth and alerts the user to imbalances or alignment issues. For the bench press it gives feedback on bar path and control and evaluates grip, elbow position and body mechanics.

Beyond form analysis, FormCheck AI tracks the user's progress and milestones, and it includes a library of articles and videos on fitness, nutrition and wellness. The feedback is personalised to the lifter and is framed around preventing injury and getting more from each session. The app is in English and rated 4+, and the developer states that identifiers and diagnostics may be collected but are not linked to identity.

FormCheck AI costs £0.99 to download and sells subscriptions as in-app purchases, including a Monthly Subscription at £19.99, a Discounted Monthly Sub at £4.99, a Yearly Subscription at £19.99, a Discounted Yearly Subscription at £99.99 and weekly pro options at £1.99 and £9.99. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the period ends. It requires iOS 15.0 or later on iPhone or iPod touch and runs on Apple Vision with visionOS 1.0 or later.

Use cases

• Checking deadlift form to avoid a rounded back
• Checking squat depth and alignment
• Improving bench press bar path and control
• Reducing injury risk through better form