About us: who is behind AITOFIT?

Updated July 2026

AITOFIT is a Finnish workout app founded by two exercise scientists from the University of Jyväskylä, Julius Granlund and Tapio Tulenheimo.

The app uses exercise science and AI to build your training program, which means your workouts and recovery are optimized on the basis of real science, not on a generic AI model. Our mission is simple: put individualized, evidence-based coaching within everyone's reach, easily and affordably, so that you train sensibly and always know what to do at the gym. Today the app has tens of thousands of users and more than 5,400 verified reviews with an average rating of 4.9/5.

How it started

AITOFIT began at the University of Jyväskylä, where we both studied exercise biology at the Faculty of Sport and Health Sciences, specializing in the optimization of gym training. We saw the contradiction up close: exercise science knows exactly how training should be programmed, yet in practice that knowledge was only within reach of people who could afford a good, genuinely qualified coach.

For years we did scientific, individualized personal training as our day job at our previous company, until we started building an app grounded in science and AI that would do everything a good, qualified coach does, and do it better. It would analyze training and recovery continuously and precisely, adapt to each person's fitness level and progress, set reps, sets and weights automatically, and take care of everything else a professional coach takes care of. One thing mattered just as much: the app had to be as easy to use as possible. That way, as many people as possible could train in a way that suits them, with real expertise and research behind them, you could simply walk into the gym, always know what to do, and trust your training.

So that is what we set out to solve. We spent more than two years building an app that brings research and AI together: a coach that looks after every workout individually, adapts as you progress, and whose algorithms are based on peer-reviewed research into training, muscle growth, the psychology of training and general health. It took sacrifices. We put everything into the company and dropped our other work; the money went into development, down to a car and a guitar we sold, and the company was built without outside funding from day one. Our growth has been covered by Keskisuomalainen, Helsingin Sanomat and Talouselämä, most recently in Talouselämä's article published in spring 2026.

AITOFIT today

Today, in the summer of 2026 and roughly three years after launch, AITOFIT is the most popular workout app in Finland and the highest-rated mobile app in the Finnish App Store. We still develop it on the same principle as on day one — although much faster and more efficiently now: the person training comes first, the science comes first, and we listen. You can message us any time through the chat button in the app or by email (valmennus@aitofit.io).

The founders and the core team

Our core team consists of MSc-level exercise scientists from the University of Jyväskylä who specialize in gym training, together with technical experts — including AI specialists — from Aalto University.

• Julius Granlund Co-founder. M.Sc. in Exercise Science (exercise physiology) and psychologist, University of Jyväskylä.
• Tapio Tulenheimo Co-founder. M.Sc. in Exercise Science (exercise physiology), University of Jyväskylä. Psychologist, University of Helsinki.
• Roope Uitto Full Stack Developer. M.Sc Exercise Science (Biomechanics), University of Jyväskylä. BBA, Information Technology
• Ilkka Tulenheimo Full Stack Developer. Bachelor of Engineering (Bio-IT),ML, Data Science & AI - Master's programme, Aalto University
• Sami Uusitalo Customer Service Representative.

What is AITOFIT built on?

Unlike most AI workout apps, AITOFIT is not built on generic language models that do not understand training well enough. Our AI models are our own, and their logic is based on peer-reviewed exercise science: the evidence on training volume, recovery and periodization, among other things. Behind the algorithms are two master's degrees in exercise physiology and years of hands-on coaching experience. That is what allows the app to adapt to your situation sensibly, quickly and correctly.

If you want to ask about training or about anything else, message us in the chat or by email. Training is a real passion for us, which is why we spent years studying the field, earned the degrees and have published research of our own. Both of us specialized in exactly this: how training is optimized for the individual. We also write openly about the science of training on our blog.

AITOFIT in the media

• Helsingin Sanomat 4/2024 Finland's largest daily tested the app as an alternative to a personal trainer
• Anna 11/2025 a journalist trained for a month on a program built by the app
• Keskisuomalainen 6/2023 the story of the company's early days
• Talouselämä 4/2026 Finland's leading business magazine on our growth story
• Yle 4/2025 Julius Granlund quoted by Finland's public broadcaster, debunking common gym training myths
• Helsingin Sanomat 1/2024 a profile of the founders
• MTV 1/2024, 12/2025 Tapio Tulenheimo as an expert on recovery and on the bench press
• Talouselämä 2/2026 AITOFIT named among the most promising companies in Finland
• Keskisuomalainen 2026, Ilta-Sanomat 2025 , and the University of Jyväskylä alumni feature 2025

The articles above are in Finnish.

AITOFIT by the numbers

• Reviews5,400+ verified, independent reviews · 4.9/5 average
• UsersTens of thousands of users
• Ownership and funding100% Finnish: developed and owned in Finland, with no outside funding
• FoundedAITOFIT Oy founded in 2022, app launched on the App Store and Google Play in 2023

Get in touch

The fastest way to reach us is the chat inside the app, or email: valmennus@aitofit.io. We read every message, and many of the app's features exist because a user asked for them. So ask us anything — all messages are read and taken into account.

Try the AITOFIT app for free