Trains you like an athlete, not a user. Reads your sleep, fuel, fatigue, and PRs — then changes tomorrow's plan accordingly. In any language you speak.
Most fitness apps drown you in graphs. PHITER gives you the next move.
Your PRs. Your recovery. Your goals. Your last shoulder tweak. Phit holds all of it — and brings it up the moment it matters. A sports scientist with the warmth of a training partner.
Strength, hypertrophy, cardio, bodyweight. Each plan is generated from real periodization rules — not pulled from a template library — and rebuilt as your data shifts.
Send a video — get bar path and tempo. Snap a meal — get macros logged. Skip a session — tomorrow's plan adapts. Phit watches everything and folds it into the next decision.
Every plan, every meal, every cue traces to peer-reviewed exercise science — the principles elite coaches actually use.
Other AI fitness apps generate plans by asking ChatGPT "make me a workout." Phit doesn't work that way.
Underneath every Phit response is a deterministic science engine built on decades of research — Schoenfeld's hypertrophy meta-analyses, Israetel's volume landmarks, Seiler's polarized cardio model, Mifflin-St Jeor metabolic equations. The AI talks to you. The engine makes the call.
That's why your plan adapts to your sleep. Why injuries auto-substitute exercises. Why a bad week dials volume down without you asking. It's not magic — it's math, validated by sports science.
Phit asks about your goal, your level, your equipment, your injuries. You answer like you would a coach. Done in 3 minutes — not 30.
Phit hands you a full training week + nutrition targets, built from your data alone. Not a template. Not a generic split.
Phit checks in daily, adjusts loads, watches your videos, logs your meals — and answers anything, in your language.
No comparisons, no chest-thumping. Just what makes Phit a different category of coach.
A coach that doesn't translate — it thinks in your language. Hebrew, Spanish, German, Mandarin, Arabic, Portuguese. Same depth, same nuance, every time.
Every workout traces to peer-reviewed periodization rules — MEV, MAV, MRV volume landmarks, polarized cardio, phase-based progression. Phit can't invent a plan. The engine generates it. Phit explains it.
Tell Phit you switched to keto. Your calorie ring re-targets. Your meal plan rebuilds. Your training adapts to the lower carb day. No menus, no settings — just talk.
Upload one bench press from your phone. Get back biomechanical scoring + 3 cues to fix. Powered by frame-by-frame video analysis.
Snap your plate. Get calories, protein, carbs, fat — logged. No database to search, no portion estimating. The vision model does it.
Your bench PR from six months ago. The shoulder you tweaked in May. Your preference for morning lifts. Phit doesn't forget — and brings it up only when it matters.
Don't put down the bar. Just talk. Phit answers out loud through your earbuds while you're between sets — no screen-tapping with chalky hands.
Tweaked your back? Phit swaps the deadlift for trap-bar. Bad shoulder? Floor press instead of bench. Biomechanics-aware substitutions, not random alternatives.
Slept 4 hours? Heavy day moves to Friday. Crushed last session? Plan pushes harder. Phit watches your sleep, fuel, fatigue, and PRs — and adjusts before you ask.
Start free. Upgrade when you want. Cancel anytime — actually anytime.
Seven days, free. No credit card. Cancel in two clicks if Phit isn't the coach you wanted.