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Klank runs on iPhone with iOS 17 or later. It's iPhone-only at launch.

No. You can log workouts and see your ranks on your iPhone without connecting. Sign in with Apple when you want to sync, add friends, post to Flex, join leagues and appear on leaderboards.

Yes. Logging workouts, PR detection and personal share cards work without a connection. The feed, leaderboards, leagues, Callouts and messages need internet.

Both. Change your unit in settings any time and every number converts.

Ranks compare your estimated max to your bodyweight, so a lighter lifter and a heavier lifter are scored fairly. If your latest bodyweight is more than 30 days old, Klank asks you to update it before computing a new rank.

For any set of 1–10 reps, Klank estimates your one-rep max, divides it by your latest bodyweight, and compares that ratio with strength standards for your sex. That produces a score from 0 to 1,000, a tier from Iron to Titan, and a division (III, II or I) within the tier. Titan shows your score instead of a division.

Overall is a weighted average of your best scores on Squat (25%), Bench Press (25%), Deadlift (25%), Overhead Press (15%) and Pull-up (10%). You need at least three of the five ranked.

Free: Back Squat, Bench Press, Deadlift, Overhead Press and Pull-up, plus Overall. Klank Pro adds Incline Bench, Barbell Row, Front Squat, Romanian Deadlift, Hip Thrust, Dumbbell Bench and Weighted Dip. You can log 150+ other exercises unranked.

Every ranked lift is rechecked on our servers. Lifts that are far above your recent best, or score in the top tiers, may be held off public leaderboards while they're reviewed. They still count on your own profile.

Your rank can move when you update your bodyweight, or when we tune our strength standards to keep tiers fair. Your lift history never changes.

Recordings are private by default. When you publish, you choose the audience. A shared link never unlocks a private recording, and blocked users can't see your content.

No. Lift videos are recorded only with Klank's camera, so the feed shows real lifts filmed in the app. Clips can be up to two minutes.

Other lifters can mark a lift “looks valid” or “needs a closer look.” Votes are opinions that add context. They never change ranks, XP or review status.

You can message people once you're accepted friends. Messages can be reported, and blocking someone ends the conversation.

You must be 13 or older. Members under 18 are friends-only by default, don't appear on gym or global leaderboards, can't receive Callouts from non-friends and can't post to the public feed.

Each week you're grouped with lifters near your rank and earn XP for working sets, workouts and PRs. When the week closes, top finishers move up a league (Rookie, Grinder, Beast, Elite, Legend) and bottom finishers move down.

Challenge an accepted friend on a ranked lift for a set number of days. The winner is whoever improves their score the most, which keeps it fair across bodyweights. Free members can have one active Callout; Pro members get unlimited.

Streaks count weeks, not days. Hit your weekly workout goal to keep it going. A freeze protects your streak for a week when life gets in the way: one a month free, three with Pro.

Seven more ranked lifts, gym, global and weight-class leaderboards, full rank history, unlimited Callouts, premium share themes and photo backgrounds, and three streak freezes a month. See pricing.

Eligible new subscribers to the annual plan get one week free. You won't be charged if you cancel at least 24 hours before the trial ends.

On your iPhone: Settings → your name → Subscriptions → Klank Pro → Cancel Subscription. You keep Pro until the end of the period you paid for. Deleting the app doesn't cancel your subscription.

Sign in with the same Apple ID, open Klank's settings or the Pro screen, and tap Restore Purchases.

Apple handles all payments and refunds. Request one at reportaproblem.apple.com.

Tap the ••• menu on a profile, lift, comment or message and choose Report or Block. Blocking is instant and works both ways. We review reports within 24 hours.

Report the lift in the app, or use the form below and choose “Report abuse or content.” Filming people without consent breaks our Community Guidelines and we'll remove it.

In the app, open your Profile, go to account settings and tap Delete account. It permanently deletes your account and synced data. Full details here.

Klank uses Sign in with Apple, so sign in with the same Apple ID you used before. If that doesn't work, contact us with your username.