RazFit vs Substy AI
Side-by-side comparison to help you choose the right product.
RazFit is your AI-powered trainer, offering quick, equipment-free workouts to transform your body in just minutes a day.
Last updated: March 18, 2026
Scale agency revenue. Automate chats, manage fans.
Visual Comparison
RazFit
Substy AI
Overview
About RazFit
RazFit is a cutting-edge iOS fitness application meticulously crafted in SwiftUI, designed specifically for iPhone and iPad users. The app delivers an array of high-intensity bodyweight workouts that can be completed in as little as 1 to 10 minutes, making it an ideal choice for those with busy lifestyles. No gym or equipment is required, allowing users to engage in effective training anywhere, anytime. The core value proposition of RazFit lies in its AI-powered coaching, featuring two virtual trainers, Orion and Lyss, who assess individual fitness levels and automatically adjust exercise routines. This ensures that users of all fitness levels, from beginners to seasoned athletes, can find suitable workouts. With a gamification system offering 32 unlockable milestones, RazFit keeps users motivated throughout their fitness journey. Each exercise includes modifications, enabling users to control their progression and achieve their fitness goals at their own pace. The app leverages advanced iOS 18+ technologies for a seamless experience, and new users can start with a 3-day free trial to explore its full capabilities.
About Substy AI
Substy is the first platform to combine a full CRM and an autonomous AI chatbot in a single system built exclusively for OnlyFans and Fanvue agencies - and today it's the most widely adopted solution on the market.
The CRM is a complete agency workspace: add your chatters with custom access levels, let them chat directly from the platform, create and track tracking links (TikTok, Reddit, Telegram), classify fans automatically into Spenders, VIPs, Newbies, and Timewasters, and monitor every chatter's performance in real time - revenue, response rate, average basket.
The AI Chatbot runs 24/7 without human input. It sells PPV, handles objections, re-engages cold fans, and adapts its tone in any language - fully autonomous, not a co-pilot.
The hybrid mode is the game changer: AI handles fans below a spend threshold, human chatters take over only for VIPs. Agencies cut costs by 25% while automating 90% of messages.
Compatible with OnlyFans and Fanvue.