RazFit vs Substy AI
Side-by-side comparison to help you choose the right product.
RazFit is your AI trainer for effective bodyweight workouts, designed to transform your body in just minutes, anytime, anywhere.
Last updated: March 18, 2026
Scale agency revenue. Automate chats, manage fans.
Visual Comparison
RazFit

Substy AI

Overview
About RazFit
RazFit is an innovative native iOS fitness app designed specifically for iPhone and iPad users, built entirely in SwiftUI. This app caters to individuals looking for efficient and effective workouts without the need for a gym or equipment. With high-intensity bodyweight workouts ranging from just 1 to 10 minutes a day, RazFit is perfect for busy lifestyles. The app features cutting-edge AI coaching with two virtual trainers, Orion and Lyss, who assess users' fitness levels and automatically tailor exercises to meet individual needs. A unique gamification system with 32 unlockable milestones keeps users motivated throughout the year. Whether you are a complete beginner or an advanced athlete, RazFit offers modifications for every exercise, allowing you to control your progression and achieve your fitness goals. The app leverages the latest iOS 18+ technologies to ensure a fast and smooth native experience. With a 3-day free trial, getting started on your fitness journey has never been easier.
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.