SubZero Gym is a complete fitness platform that puts a personal trainer in your pocket. Generate AI-powered workout plans, track every rep, monitor your recovery, and crush your goals — whether you train at a full gym, at home with dumbbells, or anywhere in between.
PICK YOUR AI, BUILD YOUR PLAN
Choose from 7 AI providers — Claude, GPT, Gemini, Grok, DeepSeek, Groq, or Perplexity — and 15 models. Generate 2 to 12-week progressive programs with periodization: Foundation, Build, Peak, and Deload phases. Plans adapt to your equipment (65+ types), schedule, and goals. Got injured? Changed your schedule? AI regenerates your plan while preserving progress.
YETI: YOUR ON-DEVICE AI (Basic and above)
Yeti runs locally on your iPhone — no internet required, instant responses.
Workout Control (98 Commands): "Skip bench press." "My shoulder hurts." "Go lighter." "Swap to dumbbells." "Only have 30 minutes." "Add a set."
Coaching: "How do I do this exercise?" — form tips, muscles, technique. "Should I train today?" — checks readiness. "Am I plateauing?" — analyzes progress.
Schedule: "Swap today with tomorrow." "Skip today." "I need rest."
AI Generation: Post-workout summaries with coaching tips. Weekly insights with volume trends. Personalized warm-ups based on today's workout. (Pro and above)
SMART FEATURES (Pro and above)
• Smart weight suggestions from your history
• Readiness score from sleep, HRV, and resting heart rate
• Plateau detection with intervention strategies
• Effort PR detection — same weight at lower RIR = strength gain
• Mid-workout fatigue detection with weight adjustment suggestions
All local. Your data never leaves your device.
TRAIN YOUR WAY
• iPhone only — workout logging, rest timer, PR detection, Live Activity
• iPhone + Apple Watch — real-time HR, voice announcements, haptic feedback
• Log on iPhone while Apple Fitness tracks HR on Watch — data merges automatically
• Apple Watch standalone — complete workouts from your wrist
TRACK EVERYTHING
• 8 PR types: max weight, reps, volume, 1RM, effort PRs, distance, pace, duration
• RIR tracking with intensity analysis
• Muscle recovery heat map — 13 muscle groups, tap for details
• Volume trends, frequency charts, complete workout history
BODY COMPOSITION
• Weight tracking with smart scale sync and trend charts
• 12 body measurements with progress indicators
• Encrypted progress photos — AES-256, Face ID required, stays on device
NUTRITION & SUPPLEMENTS (Pro and above)
• AI supplement stacks with research citations from PubMed
• Three tiers: Essential, Beneficial, Optional with daily timing
• Sync from MyFitnessPal, Cronometer, or any HealthKit app
• Macro tracking with AI-personalized targets
54 ACHIEVEMENTS, 9 CATEGORIES
Bronze through Diamond tiers. Workouts, volume, streaks, PRs, cardio, consistency, nutrition. Full-screen unlock celebrations. Shareable achievement cards.
APPLE ECOSYSTEM
• 8 Home Screen + 5 Lock Screen widgets
• Live Activity & Dynamic Island during workouts
• 4 Control Center controls
• 7 Siri Shortcuts
• WorkoutKit sync to Apple Fitness
• Focus Filters for notification control
• Apple Journal integration
• iCloud sync across devices (Pro+ and above)
• Family Sharing up to 6 members (Pro+/Elite+)
550+ EXERCISES. 65+ EQUIPMENT TYPES.
Full gym, home gym, hotel gym, bodyweight only — SubZero adapts to what you have.
PRIVACY FIRST
All data stored locally. No ads. No third-party analytics. Progress photos encrypted. AI requests processed but never stored.
6 TIERS
• Free: Core tracking, 1 plan/month
• Basic ($3.99): Yeti AI, 98 commands
• Pro ($7.99): Smart AI, Watch app, widgets
• Pro+ ($15.99): iCloud sync, Family Sharing
• Elite ($14.99): Unlimited plans, research citations
• Elite+ ($29.99): Everything + Family Sharing
Train smarter. Track everything. Achieve more.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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