LensFit is an AI-powered workout tracker for iOS. It lets you scan gym machines with your camera, log workouts, and track muscle recovery with the Battery Engine — a system that shows the energy level (0–100%) of each muscle group in real time.

Open the camera inside LensFit and point it at any gym machine. The AI identifies the equipment, shows you the targeted muscle groups, explains proper form, and lets you add the exercise to your workout with one tap.

The Battery Engine assigns a battery level (0–100%) to each of your 16 muscle groups. Every set drains the battery; every hour of rest recharges it. The interactive Body Map lets you see at a glance which muscles are ready to train and which need recovery.

LensFit is free to download with core features included. LensFit Pro unlocks unlimited AI scans and advanced performance insights. You can subscribe monthly or yearly, and cancel anytime from your iPhone Settings.

Go to your iPhone Settings → tap your name at the top → Subscriptions → LensFit Pro → Cancel Subscription. Your access continues until the end of the current billing period. LensFit does not manage subscriptions directly — all billing is handled by Apple.

Open LensFit on your new device and go to Settings → Restore Purchases. Make sure you're signed in with the same Apple ID you used to subscribe. Your Pro access will be restored automatically.

LensFit is privacy-first. Your workout data and photos are processed on-device. We do not sell your data. Camera images used for AI scanning are sent to our AI provider for identification only and are not stored. For full details, see our Privacy Policy.

LensFit requires iOS 17 or later. It runs on any iPhone compatible with iOS 17, including iPhone XS and newer. For the best AI scanning experience, we recommend iPhone 12 or later.

Yes. Workout logging, the exercise library, and the Battery Engine work fully offline. The AI camera scan requires an internet connection to process images.

Use the "Report a Bug" button in the app Settings, or email us directly at contact@lensfit.app. Please include a description of the issue and a screenshot if possible — it helps us fix things faster.

Go to Settings inside LensFit and tap "Delete All Data." This permanently removes all your workout history, scans, and preferences from the app. This action cannot be undone.