SubZero Gym SubZero Gym
Available Now

Choose Your AI. Choose Your Power.

7 AI providers. 15 models. Claude, GPT, Gemini, Grok, DeepSeek. You decide which AI builds your perfect workout plan.

Your AI Coach Lives On Your Device

Yeti AI runs 100% offline with complete privacy. Get instant feedback, voice commands, and workout adjustments—no internet required.

Rest When Your Body Says So

Heart rate-based recovery tells you when you're actually ready—not when a timer says so. Train at optimal intensity with Zone 2 detection.

Built for Apple. Like Apple Built It.

100% native Swift. Live Activities. Dynamic Island. 4 complication families. 30+ Apple frameworks. The most advanced fitness app for your devices.

One Family. Six AI Trainers.

The only AI fitness app with Apple Family Sharing. $15.99 for 6 family members—that's just $2.67 per person for personalized training.

Ask Your AI About Your Training

"What's my bench max?" "Is today a rest day?" "Should I run outside?" Yeti Chat (Beta) answers questions about YOUR data—31 tools, 100% on-device.

iPhone iPad Apple Watch 7 AI Providers 100% Native Swift

What Makes SubZero Gym Different

Features you won't find in any other fitness app

Choose Your AI

7 providers, 15 models — Claude, GPT, Gemini, Grok, DeepSeek, Groq, Perplexity

Only app giving you AI choice

On-Device Yeti AI

First on-device LLM in any fitness app. Voice commands, Yeti Chat (Beta), instant responses—all 100% private and offline.

Industry-first technology

HR-Based Recovery

Rest timer shows "Ready!" when you've recovered to Zone 2, not when a timer says so.

Train at optimal intensity

Family Sharing

One subscription, 6 family members. The only AI workout generation app with Apple Family Sharing.

$2.67 per person

98 Voice Commands

Control your workout hands-free. "Skip this exercise," "That was too heavy," Yeti listens and adapts.

Works 100% offline

100% Apple Native

Pure Swift and SwiftUI. 30+ Apple frameworks integrated for the smoothest fitness experience possible.

No cross-platform compromises

See All 18 Unique Features

See SubZero Gym In Action

Swipe to explore

How It Works

From setup to your first workout in minutes

1

Complete Your Profile

Enter your personal details, fitness goals, experience level, and available equipment.

2

Pick Your AI

Choose from Claude, GPT, Gemini, Grok, or DeepSeek—you control which AI builds your plan.

3

Cloud AI Generates

Powered by ShadowPing's infrastructure, your chosen AI creates a complete periodized program.

4

Train with Yeti

On-device Yeti AI coaches you through workouts with voice commands and real-time adjustments.

Choose Your Plan

From free forever to unlimited everything

Free

$0 /forever
  • 1 plan/month (2-week)
  • 1 profile
  • Gemini Flash AI
  • Active Workout Mode
  • Skip & Reschedule
Download Free

Basic

$3.99 /month
  • Everything in Free
  • 4 plans/month (4-week)
  • 4 AI models
  • Yeti AI (4 Core)
  • Voice Commands (98)
Download App
RECOMMENDED

Pro

$7.99 /month
  • Everything in Basic
  • 12 plans/month (8-week)
  • 3 profiles
  • 9 AI models (Claude, GPT, Gemini)
  • Apple Watch app
  • Live Activity & Dynamic Island
  • Widgets & Complications
  • Smart Features (5) + Nutrition
Download App

Elite

$14.99 /month
  • Everything in Pro
  • Unlimited plans (12-week)
  • 5 profiles
  • 15 AI models (all premium)
  • Nutrition Dashboard
  • Research Citations
  • iCloud Sync
Download App
FreeBasicProPro+EliteElite+
Monthly $0$3.99$7.99$15.99$14.99$29.99
Yearly (Save ~17%) $39.99$79.99$159.99$149.99$299.99
Plans/Month 141212
Plan Length 2 wk4 wk8 wk8 wk12 wk12 wk
Profiles 113355
AI Models 14991515
Nutrition Stack
Nutrition Dashboard
Research Citations
iCloud Sync
Family Sharing
Yeti AI (4 Core)
Voice & Text Commands (98)
Yeti AI & Smart Features (3 AI + 5 Smart)
Smart Plan Regeneration
Apple Watch App
Live Activity & Dynamic Island
Watch Complications
Home & Lock Screen Widgets
Siri Shortcuts & App Intents
Control Center Controls
Focus Filters
Interactive Widget Buttons
Readiness Widget
Watch Smart Stack Widgets
StandBy Widgets
Core Haptics
Journal Integration
Active Workout Mode
Skip & Reschedule

Privacy-First Architecture

Yeti AI lives on your device for instant voice commands, exercise tips, and workout analysis—100% private, zero data transmission. Cloud AI plan generation is powered by ShadowPing's secure infrastructure with AES-256 encryption and zero personal data retention on servers.

Local Storage
Data stays on device
AES-256
Encrypted transmission
App Attestation
Secure Enclave verified
No PII Stored
Zero server retention
SubZero Gym
100% Apple Native
Pure Swift & SwiftUI
Powered by ShadowPing AI

Train Smarter. Get Stronger. Break Through.

Your goals. Your AI choice. Your complete privacy.

Download on the App Store Why SubZero Gym?

Available on iPhone, iPad, and Apple Watch

Requires iOS 18.6 or later

Questions? Contact Support