Movements
Your library of lifts. Tag with equipment, rep ranges, notes. Anything from a Smith squat to a single-arm cable curl.
Open it. Hit start. Log your sets in three taps. Then watch the numbers go up.


Three layers. One system. Build it once — train it forever.
Your library of lifts. Tag with equipment, rep ranges, notes. Anything from a Smith squat to a single-arm cable curl.
Stack movements into a session. Order them, set targets, dial in progression.
Combine workouts into a weekly plan — PPL, Bro Split, custom 6-day. The app picks today’s session for you.
REPDEMON is free during beta. Log every rep, track your numbers, unlock personalized 1RM calculations after just 3 movements. No credit card required. Early users get priority access to premium features coming soon.
Start for free
Open the app. Hit Log Workout. Choose a split, pick today’s session, start lifting. Or roll a one-off custom — no rules.

RepDemon remembers what you lifted last and tells you exactly what to try today. Hit your range — load goes up. Miss it — stay put. No spreadsheet.

Sessions, sets, volume — weekly heat-map, most-trained movements, best 1RM PRs, the pack leaderboard. Receipts for the work.

Everything you wanted to know about progressive overload, 1RM calculations, and how REPDEMON tracks your strength training.
Progressive overload is the practice of gradually increasing the demands on your muscles during training. This can mean more weight, more reps, more sets, or shorter rest periods. RepDemon calculates the optimal progression automatically based on your 1RM and rep range.
RepDemon uses the Epley formula to calculate your estimated 1-rep max from any set. Formula: 1RM = weight × (1 + reps ÷ 30). After you log 3 movements (typically 9 sets), REPDEMON unlocks personalized 1RM calculations and weight recommendations.
Yes. REPDEMON is a Progressive Web App (PWA) that works completely offline. Log your workouts in the gym without an internet connection, and your sessions sync automatically when you reconnect.
REPDEMON is free during beta. A paid tier is coming in the future, but early users get priority access to premium features and beta pricing.
After you log 3 movements with at least 3 sets each (9 total sets), REPDEMON unlocks 1RM calculations, estimated max weights, and smart progression recommendations based on the Epley formula.
Warm-up sets are lighter reps before your working sets to prepare your muscles and joints. Log them just like regular sets — REPDEMON tracks everything. Your working sets unlock 1RM calculations; warm-ups are there for safety and preparation.
The Pack is our privacy-first training community (coming soon). Compare progress with friends using invite codes — no public leaderboards, no exposure. Training partners keep you accountable without sacrificing privacy.
Yes — Google Calendar integration is coming soon. Sync your training schedule from REPDEMON to Google Calendar for automatic workout reminders. Never miss a session.
Start with movements (add all exercises you'll use), then build workouts (assign movements to workout days), then create or assign to splits. This prevents duplicates and keeps your library clean. REPDEMON guides you through this workflow.
Start by logging any 3 movements — doesn't matter if you're new. After 9 total sets (3 movements × 3 sets), REPDEMON unlocks your personalized 1RM calculator and smart weight recommendations. You learn as you go.
Free during beta
Ready to track every rep?