marble.fit vs Repstack

Marble is a private workout journal built for fast logging, focused training, and clear progress. Record weights, reps, distance, time, RPE, rest, notes, bodyweight, and supplements without an account, ads, or tracking. Your core data stays on your iPhone or iPad. ADD A WORKOUT IN YOUR OWN WORDS - Paste or type natural language, gym notation, multi-day Notes, or a Hevy or Strong CSV - Let Apple Intelligence structure prose on device when available - Review every workout, exercise match, set, date, RPE, rest, and note before saving - Resume an interrupted review with your saved edits intact - Keep working with deterministic on-device parsing for notation and file imports LOG WITHOUT LOSING YOUR FLOW - Repeat your last set or use Save + Next for quick logging - See personal-record targets while you enter a set - Start and finish focused workout sessions - Search completed sessions, filter by date, and repeat a workout as an editable draft - Build weekly splits and reusable sprint prescriptions - Track rest with an in-app timer, Live Activity, Dynamic Island, and rest-complete alert UNDERSTAND YOUR PROGRESS - See your top weighted exercises with their personal-record weights and dates - Open Details for weekly goals, estimated 1RM, records, and training consistency - Review Daily Highlights: a private evening recap of truthful same-day progress - Track bodyweight manually or import it from Apple Health, and correct a weigh-in if a number was wrong - Compare strength relative to bodyweight with a per-lift DOTS score - Explore muscle-group, rep-range, effort, supplement, and calendar views REACH MARBLE FROM iOS - Add the Weekly Goal widget to your Home Screen or Lock Screen - Log a set, repeat your last set, and start or finish workouts with Siri and Shortcuts - Find exercises through Spotlight - Open quick logging from Control Center, the Lock Screen, or the Action button BRING IN MORE WORKOUTS - Import Apple Health and Apple Watch workouts - Bring Garmin workouts through Apple Health - Scan handwritten workouts with on-device text recognition and review before saving - Optionally send completed strength sessions to Apple Health YOUR DATA STAYS YOURS - Export and restore a portable JSON backup of your persisted training data - Progress photos and videos remain on your device and are not included in backup files - No account, Marble server, advertising, or third-party tracking Just your training, clearly recorded and clearly understood.

You already have a training program. You just need a better place to put it. Repstack is the fastest way to get your training program off a spreadsheet and into your pocket. Paste your program from any source — AI structures it into a clean, editable plan in seconds. No manual entry. No rebuilding it exercise by exercise. Just paste and go. Built for experienced lifters who follow structured programs and don't need an app telling them what to do. No coaching. No recommendations. No charts. Just your program, organized and ready to use. IMPORT FROM ANYWHERE — INSTANTLY • Paste from Google Sheets, Apple Notes, PDFs, coach emails, or text messages • AI parses any format — spreadsheets, plain text, tables, whatever you have • Preserves your exact exercises, sets, reps, RPE, and notes • Handles complex notation: 3x5 @8, 5/3/1, AMRAP, top sets, backoffs • Your entire program is structured and usable in seconds — not hours EDIT FASTER THAN ANY OTHER APP • Chat with AI: "Add bench press 5x5 at RPE 8" — done • "Superset curls and pushdowns, 3 rounds" — done • "Make all sets AMRAP" — done • Full manual editing too — tap any exercise, set, or note to change it • Supersets, circuits, exercise groups — all seamless STRUCTURED FOR REAL PROGRAMS • Weeks and training days — the way real programs are written • Notes at every level — program, week, day, exercise, set • Mark days and sets complete as you train • Standalone workouts for one-off sessions FAST, CLEAN, INTUITIVE • No clutter, no distractions, no features you'll never use • Opens instantly — your program is right there • Every action is one or two taps • Designed for the gym floor, not the couch PRIVATE BY DEFAULT • All data stored locally on your device by default • Pro subscribers get automatic cloud backup — stored securely, not tied to your name or email • AI features send your text for processing — not stored after use • No accounts, no analytics, no tracking, no social features REPSTACK PRO • Unlimited AI imports and chat edits • Automatic cloud backup to restore across devices • Monthly or yearly subscription Built for powerlifters, bodybuilders, and anyone running a structured program who's tired of squinting at a spreadsheet between sets. Privacy Policy: https://repstack.up.railway.app/privacy Terms of Use: https://repstack.up.railway.app/terms