Every fitness tool you need. Free.

Upload a video of your squat, bench, or deadlift. AI extracts keyframes and returns rep-by-rep form analysis: overall score, fault detection with severity, rep count, and concrete fix cues scored against NSCA and Starting Strength standards. 3 free checks per day.

Paid in: Sculptor, Gymscore, personal-trainer form checks ($50-100/session)

Photograph any meal. Gemini Vision identifies foods and estimates calories, macros, and micronutrients per item. 2 free scans per day.

Paid in: Cal AI, MyFitnessPal Premium ($19.99/mo), Lose It Premium

Pick a goal, days, and equipment. Get a custom-generated workout with warm-up, main work, and cooldown. 2 free workouts per day.

Paid in: JuggernautAI, Fitbod ($15.99/mo)

Upload a torso photo. Gemini Vision estimates body fat, classifies somatotype, identifies muscle strengths and weaknesses, and builds a 4-week NSCA-guided program targeting your weak points. 10 free analyses per hour.

Paid in: Bodbot, DEXA scans ($50-150), Macrofactor body audits

Paste your training routine. AI critiques volume balance, frequency, gaps, and gives a letter grade. Spicy or constructive tone. 2 free roasts per day.

Side-by-side before/after composer with date, weight, and Zealova watermark. Download as JPG, PNG, or WebP. Nothing uploaded.

Drop your lift, weight, reps, and bodyweight. Download a share-ready PR card with confetti, gradient burst, and bodyweight ratio.

Paid in: Most fitness apps charge for branded share cards

Diploma-style certificate for any fitness streak. Workouts, cutting, bulking, cardio. Print-friendly 1200×900 landscape.

TikTok and Reels ready 9:16 card with total volume, duration, and top 3 lifts. Hero volume number, gradient background.

Paid in: Most fitness apps charge for branded share cards

Spotify-Wrapped style annual stats card with top 3 lifts, total volume, and body weight change. 1080×1920.

Paid in: Most fitness apps charge for branded share cards

10 questions, 8 archetypes. Power Princess, Volume Goblin, Form Nerd, more. Download a shareable result card with your split.

8 protocols (12:12, 14:10, 16:8, 18:6, 20:4, OMAD, 36-hour, custom) with sound and notification when complete. Metabolic phase tracking. Resumes after tab close.

Paid in: Zero, Fasted, Fastly (most charge for protocol picker + phase tracking)

Between-sets countdown with audible beep, browser notification, vibration, and presets for strength, hypertrophy, endurance, and powerlifting.

Five modes in one: Tabata, custom HIIT, EMOM, AMRAP, For Time. Phase cues, vibration, browser notification.

Paid in: Seconds Pro, Tabata apps

Bedtime and wake time planner based on 90-minute sleep cycles, with a 15-minute fall-asleep buffer.

Estimate your one-rep max from any submaximal set. 7 formulas side-by-side.

Convert between Reps in Reserve, Rate of Perceived Exertion, and percentage of 1RM.

Paid in: Most powerlifting coaching apps

See exactly which plates to load on the bar to hit a target weight. Supports 45/35/25/15/10/5/2.5 lb and 25/20/15/10/5/2.5/1.25 kg plates.

See where your lifts rank against millions of others, by bodyweight and sex.

Paid in: StrengthLevel.com (cookie-gated)

Calculate your Wilks score for comparing powerlifters across bodyweights.

Calculate DOTS score, the modern alternative to Wilks used outside the IPF.

Calculate IPF GL (Goodlift) points, the official IPF scoring system since 2020.

Calculate Schwartz-Malone score, the older sex-adjusted powerlifting formula.

Basal Metabolic Rate using all 4 major equations: Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, Cunningham.

Total Daily Energy Expenditure. 4 BMR equations × 5 activity multipliers, all compared.

Estimate body fat using 5 methods: Navy, JP3, JP7, Covert Bailey, RFM.

Paid in: Coaching apps + clinical DEXA ($50-150)

Estimate your fat-free mass using Boer, James, and Hume formulas.

Body Mass Index with category, plus key caveats for muscular and athletic populations.

Estimate ideal body weight using Robinson, Miller, Devine, Hamwi, and BMI-range methods.

Find your healthy weight range based on BMI, age, and frame size.

Log daily intake and weight for a week. Auto-computes total deficit, average daily deficit, projected fat loss. Saves to your browser.

Paid in: MyFitnessPal Premium ($19.99/mo), MacroFactor ($11.99/mo)

Paste your supplements. Get evidence tier, optimal timing, optimal dose, and PubMed citations per item. Flags redundancies, missing high-value supplements, and poor timing.

Paid in: Examine.com+ ($29/mo), supplement coaching ($75-200)

Variable-duration cut: maintenance × 15 minus 500, LBM-based protein, walking + alcohol bonuses, weekly weight projection. 4 to 26 weeks.

Paid in: Helms-style coaching apps, Renaissance Periodization Diet

Calculate daily protein / carbs / fat targets based on goal, body weight, and activity.

4-week macro simulation that adjusts weekly based on weight trend. Like MacroFactor, but free.

Paid in: MacroFactor ($11.99/mo)

Recalculate your TDEE from 7 days of actual intake and weight change. Break diet plateaus.

Paid in: MacroFactor, Carbon, Stronger U

Optimal protein split per meal based on 0.4-0.55 g/kg per meal research (Schoenfeld, Aragon).

High / medium / low carb day macros based on training schedule.

Translates drinks per week into MPS suppression, testosterone window, cortisol elevation, REM loss, and days delayed to next PR. Built on Parr 2014, Vingren 2013, Ebrahim 2013.

Estimate calories burned during exercise using MET values from the Compendium of Physical Activities.

Estimate VO2 max from 5 protocols: Cooper, 1.5-mile run, 12-min run, Bruce, Queens College step.

Paid in: Garmin (hardware-gated)

Convert between pace, speed, distance, and time for runs and rides.

Find your training heart rate zones using Karvonen, Tanaka, and Fox formulas.

Calculate hourly sweat rate and per-workout fluid needs from pre/post weight.

Paid in: Sports-science consults

Recommended weekly sets per muscle group based on Schoenfeld 2017 dose-response research.

Paid in: JuggernautAI, RP+

Plan a 4-6 week volume ramp for each muscle group, MEV to MAV to MRV.

Paid in: RP+ ($24.99/mo)

Recommends deload timing and intensity based on accumulated weekly volume and training fatigue.

Estimate weeks needed for your cut or bulk given start/end body fat % and weekly deficit/surplus.

Powerlifting peak week tapering plan. Volume reduction schedule for meet day.

Paid in: Paid powerlifting coaching

Realistic 16-week hypertrophy plan with per-muscle weekly volume targets (Schoenfeld 2017), 1.6 to 2.2 g/kg protein, lean surplus, and Lyle McDonald natural gain curve.

Paid in: Jeff Nippard programs ($30-90), RP Hypertrophy app ($24.99/mo)

Cut from your current body fat to your target with a science-based deficit, 1.1 g per pound protein, cardio dose, refeed schedule, and week-by-week loss curve.

Paid in: Carbon Diet Coach, Stronger U, Renaissance Diet App

Muscle preservation cutting protocol. Caps deficit at 500 cal, holds bench/squat/deadlift within 5%, cuts accessory volume first, schedules diet breaks every 7 weeks.

Paid in: Helms-style coaching ($150-400/mo), MASS Research Review

Log workouts in a clean multi-row form. Export as CSV or print to PDF. Fully local, nothing uploaded. Built for lifters who want their own data.

Paid in: Strong ($4.99/mo), Hevy Pro ($4.99/mo)

5-step wizard generates a 4-week training plan based on your goal, experience, equipment, and schedule. Volume calibrated to Schoenfeld hypertrophy research.

Paid in: Jeff Nippard programs ($30-90), Boostcamp Premium ($9.99/mo)

Pick a vibe, get a real workout. Ten vibes, ten complete training sessions, no signup.

Pick the physique you want, get the training principles, sample split, and timeline.

Lifetime cost of skipping the gym. Money, hours, muscle, VO2. Plus the motivational flip.

See how much caffeine is still in your system at bedtime, and the latest you can drink coffee for clean sleep. Pharmacokinetic decay model.

Paid in: Sleep coaching apps, Calm/Headspace adjacent

Scale any recipe up or down by servings. Paste an ingredient list, get scaled quantities. Includes a cooking-measurement converter.

Five-question decision tool that tells you whether to train, modify, or rest today. Scores sleep, soreness, stress, frequency, and fueling.

Paid in: Whoop, Oura recovery scores (hardware-gated)

Eight questions, one shareable compatibility code. Compare codes with a friend to see if you would survive lifting together.

Free week-by-week marathon training plan tailored to your race date, goal time, mileage, and experience. Base, build, peak, taper.

Paid in: TrainingPeaks, Runna ($14.99/mo)