FitLens

Overview

FitLens is an AI personal trainer application for iPhone that uses advanced artificial intelligence and computer vision to analyze workout form, automatically count repetitions, and track training progress through the device's camera. The app is designed around the principle of "Train smarter. Move better. See progress." It removes reliance on external sensors, wearables, or manual logging, offering a science-driven coaching experience that goes wherever you do. The app is built for iPhone and leverages the device's camera for real-time analysis, with a user interface designed for effortless navigation during workouts. Whether you are squatting, pressing, or deadlifting, FitLens converts every session into a measurable learning opportunity, giving you the insights to improve technique and output.

At the heart of FitLens is its AI-powered form analysis engine. Through computer vision, the app captures every repetition and delivers instant, visual feedback on key biomechanical factors including posture, range of motion, and overall movement mechanics. It automatically segments sets, counts reps, and tracks depth for key lifts such as squats, bench presses, and deadlifts. The system's posture and depth tracking ensures that critical details like knee valgus, bar path, and squat depth are caught early, allowing for immediate corrections. The AI also identifies weak points in your positioning and generates real-time tips for cleaner, safer movement. By highlighting inefficiencies and potential injury risks, FitLens helps you perfect technique and build durable strength.

FitLens functions as a full-spectrum workout tracker and adaptive coaching system. It monitors training volume, intensity, and performance for every session, then visualizes your evolution with progress charts and rep-by-rep summaries. Exercises, sets, and personal bests are auto-logged, removing the burden of manual tracking. The app's adaptive engine learns from your movement patterns to supply personalized insights such as smart feedback on recent performance, suggestions for rest, tempo adjustments, and technique refinements. These insights help athletes adjust training variables while reducing the risk of overtraining or injury. This keeps your training program aligned with your goals and ensures steady, safe progress.

Recording workouts with FitLens is effortless. Simply position your iPhone to capture your sets; the app automatically detects and classifies exercises, analyzes the footage, and replays key reps with AI annotations. No setup is required, and it works equally well for home workouts and gym training. Data privacy is a core principle: all videos and metrics are stored securely with privacy-first technology, and nothing is shared without your consent. With a lightweight footprint of 25.6 MB and support for iOS 18.5 and later, the app is accessible and quick to deploy on any compatible iPhone. Designed for beginners to elite athletes, FitLens supports bodyweight, dumbbells, barbells, and machine-based training. It complements your existing routine and helps you train stronger, safer, and more efficiently, turning your iPhone into a powerful AI personal trainer.

Core capabilities

AI-Powered Form Analysis

Uses computer vision to analyze every rep and provide instant visual feedback on form, range of motion, and posture.

Automatic Rep Counting

Automatically counts repetitions and segments sets based on your movement patterns.

Posture and Depth Tracking

Monitors critical movement details for key lifts like squats, presses, and deadlifts.

AI-Generated Technique Tips

Provides actionable suggestions for cleaner, safer, and more efficient movement.

Volume and Intensity Analytics

Tracks training volume, intensity, and performance across every session.

Progress Visualization

Displays charts to measure strength gains and form consistency over time.

Auto-Exercise Logging

Automatically logs exercises, sets, and personal bests without manual entry.

Adaptive Coaching Insights

Learns from your movement patterns and delivers personalized training recommendations.

Effortless Recording and Review

Records sets via the iPhone camera with automatic exercise detection and AI-annotated replays.

Privacy-First Data Security

Keeps all videos and metrics secure, with nothing shared without explicit consent.

Use cases

Performing squats, presses, and deadlifts with real-time form feedback

Tracking progress across multiple workout sessions

Home workouts with bodyweight and dumbbells

Gym training with barbells and machines

Technique refinement for compound lifts

Replaying key reps with AI annotations to analyze movement

Setting personal records and monitoring strength gains