Training · Nutrition · Fasting · Recovery
Herculex brings workout logging, nutrition tracking, fasting and recovery into one app — and connects them. Programs adapt to how you recover, calorie targets learn from your real intake and weight, and everything syncs between your phone and the web.
One app, four domains
Most people juggle a workout log, a calorie counter and a fasting timer. Herculex puts them on one dashboard so each part can learn from the others.
Training
483 exercises, 19 set types, supersets, an automatic rest timer and PR detection on every set.
Nutrition
Search 44,000+ EU foods, scan barcodes, build recipes and track 20 micronutrients alongside your macros.
Fasting
From 12:12 to 72-hour fasts, with an hour-by-hour stage timeline, weekly schedules and streaks.
Recovery
Recovery across 19 muscle groups, CNS load, joint-stress flags and deload advice when you need it.
Training
Big targets, one-tap sets and the numbers you need between sets — nothing you have to dig for mid-workout.
Last time, every time
Your previous weight, reps and RPE sit next to each set, with targets from your program.
Rest timer that starts itself
Tick a set and the right rest starts — supersets only rest after the last exercise.
Plates, machines, bands
Plate calculator, saved machine settings, chains and bands counted into your real load.
PRs and strength levels
Estimated 1RM PRs on every set and a level from Novice I to Elite V.
Pick your hero from 13 Greek-myth avatars.
Programs
Start a proven program or let Herculex build one around your schedule, equipment and goal. Either way, it keeps adapting as you train.
Pick your days, equipment and goal. The planner chooses every exercise, set and rep range.
Linear, block, concurrent or conjugate — with waves, deloads and a week-by-week editor.
Skipped a session or recovering slowly? Next week adjusts, and you approve the change.
Ready-made programs
Training techniques
Herculex logs 19 kinds of set. Not sure what a drop set or a myo-rep set actually is? Every technique comes with how to do it, when to use it and how the app counts it.
Hit failure, cut the weight, keep going.
How it worksOne activation set, then short mini-sets with five breaths of rest.
How it worksGo to failure, breathe for 15–20 seconds, squeeze out more reps.
How it worksSame weight, one rep fewer each set.
How it worksHalf-range reps after you can no longer finish full ones.
How it worksA spotter helps you finish extra reps after failure.
How it worksNutrition
Herculex compares what you eat with how your weight trend moves, and recalibrates your maintenance calories every week. No guesswork, no crash diets — and a number you set yourself is never overwritten.
2,640 kcal / day
Measured from 28 days of food logs and 11 weigh-ins. Recalibrated weekly.
Chest is still recovering from Monday. Today suits legs or pulling.
Hercul sees 64% of your volume going to pushing. Pulling builds the shoulders that let you keep pushing — even it up over the next few weeks.
Review muscle volumeRecovery & insights
Every set feeds a recovery model for 19 muscle groups and your nervous system. Hercul, the built-in coach, turns the patterns into plain advice.
Herculex AI
AI takes the typing out of logging and explains your data in plain words — but it never takes the wheel.
Snap, speak or scan
Photograph a meal, describe it out loud, or scan a nutrition label — AI drafts the entry.
Deterministic first
Your program is planned by Herculex’s own engine. AI writes a brief; the planner still picks every exercise.
You confirm everything
AI never writes to your data. Every suggestion is a draft until you review and accept it.
Rambler
Describe what you ate. Review before it's logged.
Herculex AI draft
Phone and web
Log sets on your phone — even offline. Then open app.herculex.app to plan meals, build programs and dig into insights on a big screen. Same account, same design, always in sync.
Open web appSmartwatch companion
Log sets in seconds, let smart haptic timers tap your wrist, and track live heart rate without carrying your phone. Switch between Apple Watch and Android Watch to explore the native experience.
Barbell Bench Press
2/3 sets · Last: 80 kg × 8
Barbell Back Squat
0/3 sets · Target: 100 kg
Golden standard of intermittent fasting! Fat oxidation reaches peak metabolic efficiency.
Privacy
Herculex is built for the GDPR, including the stricter rules for health data. The most sensitive data never reaches our servers at all.
Steps, sleep and heart rate from Apple Health or Health Connect are never uploaded.
Progress photos never leave your device. Location data is stripped and face blur is optional.
Synced data is protected by row-level security — only your signed-in account can read it.
Download everything as JSON, or delete your account and all cloud data in one step.
Not on your phone — Herculex works fully offline without signing in. An account lets you sync between devices and use the web app.
Yes. Sign in at app.herculex.app with the same account and pick up where you left off: food log, workouts, programs and insights stay in sync with your phone.
Data from Apple Health and Health Connect (steps, sleep, heart rate), progress photos, the watch companion and home-screen widgets.
Yes. The phone app keeps everything in a local database and syncs with your account when you are back online.
No. Targets, recovery scores and recommendations are for fitness guidance only. Talk to a doctor before starting a new diet, fasting or training plan.
In the app go to Profile → Settings → Account → Delete Account. Your account and all cloud data are removed permanently. More about account deletion.
The phone apps are on their way to the App Store and Google Play.
