Jump to any section below to explore SubZero Gym's comprehensive feature set.
Industry-first innovations that make SubZero Gym truly unique
Choose from 7 AI providers, train with on-device Yeti, control with voice
Choose from Claude, OpenAI, Gemini, Grok, DeepSeek, Groq, or Perplexity to generate personalized workout plans.
Free: Gemini Flash
Basic: + GPT-4o-mini, DeepSeek, Groq
Pro/Pro+: + Claude Sonnet 4, GPT-4o, Gemini 2.5 Pro, Grok 3, Perplexity
Elite/Elite+: All models including Claude Opus, GPT-5, o3-mini, Grok 4
The first on-device LLM in any fitness app. Complete privacy, instant responses, works offline.
Hands-free workout control. Speak naturally or type.
All on-device • No internet required
Ask anything about your training. Get instant, personalized answers from an AI that knows your workouts, PRs, schedule, and progress.
"What's my workout today?"
"What's my bench max?"
"How am I doing this week?"
"Should I run outside today?"
"What's my readiness score?"
"What supplements do I take?" (Pro+)
31 tools • 100% on-device • Works offline
Full watch app, HR-based recovery, haptics, complications
Scroll horizontally to see all 10 watch screenshots → Swipe to explore 10 watch screenshots
Rest timer shows "Ready!" when your heart rate returns to Zone 2. Train at the right intensity, not by the clock.
Progress rings, set counts, and elapsed time at a glance on every watch face style.
Start on iPhone, continue on Watch—or vice versa. All data syncs bidirectionally in real-time.
RIR tracking, progressive periodization, skip & reschedule
Log Reps In Reserve (0-4) after each set. AI uses RIR for weight suggestions, fatigue detection, and effort PRs.
2, 4, 8, or 12-week programs with Foundation, Build, Peak, and Deload phases.
Live timer, automatic rest periods, live heart rate from Apple Watch, HR zone indicators, previous workout reference, real-time PR detection, crash recovery.
Life happens. Skip workouts without breaking your plan. Absorb a rest day to keep shifts within the same week, or let them cascade into overflow weeks.
Phase-aware badges warn when intensity doesn't match the current week.
10 categories from cardio to combat sports. AI creates workouts using only your available equipment.
Exercise analytics, muscle heat map, progress photos
Interactive body diagram showing recovery status of 13 muscle groups with color-coded indicators.
Weight tracking, 11 body measurements, and weight goals with progress tracking.
6 pose types with AES-256-GCM encryption, Face ID/Touch ID required, device-only storage.
Track calories, protein, carbs, fat, and water from MyFitnessPal, Cronometer, MacroFactor, Lose It!, Noom, or any HealthKit-connected app.
AI-personalized targets, progress charts, achievement badges
54 achievements, share cards, PR celebrations
Gamify your fitness journey. Earn badges with 5 tiers of rarity. Achievements persist forever.
Generate beautiful, social-ready cards to celebrate your achievements. Perfectly sized for Instagram Stories, TikTok, Twitter.
Automatic personal record tracking. Celebrates your achievements instantly.
Widgets, Live Activities, Family Sharing, supplements, native integration
Your fitness journey, always visible on your Home Screen.
Quick access without unlocking. Circular, rectangular, and inline formats.
iOS 16+ • StandBy Mode optimized
Your workout on your Lock Screen and Dynamic Island—no unlock required.
Personalized supplement recommendations with research citations. Most fitness apps ignore supplements entirely.
Life happens. Injury, goal change, new equipment, schedule shift, or time away? Regenerate your plan mid-cycle without losing progress.
The ONLY AI workout generation app with Apple Family Sharing. One subscription, 6 family members.
Alternating weekly schedules for rotating shifts, shared custody, or complex routines.
Track timed exercises like planks, wall sits, and cardio with precision.
Pure Swift and SwiftUI. No React Native. No Flutter. 30+ Apple frameworks integrated for the most seamless fitness experience on iPhone and Apple Watch.
Mixed cardio and strength? SubZero Gym detects it and exports as "Cross Training"—not just "strength" like most apps. Your Apple Health data, accurately categorized.
Download SubZero Gym and start your personalized fitness journey today.
