Run a marathon with Hiiro
Join 1% of world population that have finished a 42.2 km race.
A coach-built training plan, delivered through AI.
Train by RPE*, adapt around your life, and finish your first 42.2 km.
A coach-built training plan, delivered through AI.
Train by RPE*, adapt around your life, and finish your first 42.2 km.
1. Tell us about yourself
Answer a few questions so the algorithm can read your fitness level and starting point.
2. Choose your dream race
Your first 42.2 km should be special. Big city sights, alpine landscapes, rural villages, pick yours from a curated catalogue of races worldwide.
3. Start training
Your plan is built on the methodology of our UESCA-certified head coach and tuned to your fitness, schedule, and recovery. Workouts sync to your Apple Watch automatically.
4. Get coach support 24/7
Our AI coach is trained on the methodology of certified human coaches and runs inside hard guardrails, so it will not improvise advice that could injure you. Ask anything, reschedule sessions, get answers any time.
5. Get race advice
When the big day is near, get your personalised recommendations for the race. Our coach will guide you through the process so you can dodge the notorious beginner traps and come to the starting line with confidence.
6. Become a marathoner
Get to the pinnacle of long-distance running. Enjoy every step of those 42.2 km, cross the finish line and collect your medal.
Unleash your inner hiiro
Features
- RPE-based trainingOur approach to workouts is unique. Unlike generic heart rate and pace-based methods, we offer workouts based on RPE, Rate of Perceived Exertion. It's a scale of 0 to 10 where 0 is no effort, and 10 is an all-out sprint. RPE keeps you in the sweet spot between overtraining and undertraining, the same scale our certified head coach uses when working with athletes one-to-one.
- Coach-built AIA great human coach personalises your training, pushes when needed, and answers your questions. The catch is that they also coach dozens of others and live their own life, so you only ever get a fraction of their attention. Hiiro Coach gives you that attention 24/7. It is not a wrapper around a public chatbot. It is a multi-agent system built on the methodology of our UESCA-certified head coach, with safety layers that block any answer outside of proven coaching practice. Trained on real running data and reviewed by humans as it keeps learning.
- 1 week free trialStart with a free 7-day trial, no commitment. Stay with the plan, and within 2 months, a 10 km run will be a normal part of your week - real progression, built by a real coach, delivered through an AI that adapts as you go.
- FlexibilityEven the best training plans cannot predict how life gets in the way, whether it is a cold, a missed alarm, or a busy week at work. The coach reviews and rebuilds your plan every week. Skip a run or reshuffle your schedule, and the plan will rebalance to get you back on track. No guilt, no rigid structure, just smart adjustments that meet you where you are.
Hiiro
A coach-built marathon plan that adapts every week, supported by an AI coach with safety guardrails set by certified humans.
FAQ
Hiiro is designed to coach anyone to run a marathon. You do not need any running experience to start. The algorithm adapts to your level and the RPE-based approach lets you train at your individual intensity. From zero to hero, quite literally.
If you have experienced an injury, please consult a physiotherapist or a doctor and get cleared for running first. Once that is done, fill out the questionnaire in the app, mark that you have recently recovered from an injury, and the algorithm will build a plan with a milder progression.
Hiiro is aimed at first-time marathoners, but the training adapts to your level and is not limited to beginners. If this is not your first race, you can use Hiiro to train for your next PB. Just specify your level in the questionnaire.
Hiiro is designed to minimise injury risk, but it cannot rule it out completely. If you have to miss training, the schedule will rebuild automatically so that you can ramp back up to your previous fitness without rushing it. If your injury leaves too little time to prepare for the selected race, Hiiro lets you choose another marathon within your subscription period (1 year).
Hiiro has an annual subscription - £79.99 (or £9.99 per month) with first week as a free trial. We will process the payment at the end of the trial period. We will send email reminders about the upcoming payment.
You need an Apple Watch to train with Hiiro. Connect it to the Hiiro iOS app and your workouts will sync automatically. Hiiro does not yet support other smartwatches. Garmin support is in development.
Hiiro suggests races that leave you enough time to prepare. If you are not an experienced runner, you will need a longer training window than a seasoned athlete. We care about your health and your race-day experience, and we want to make sure you have sufficient training before you reach the start line. Building volume and intensity too fast is the fastest path to injury, and we will not put you on that path.
Hiiro will not let you swap arbitrary training days because the order of workouts matters. Hard sessions need recovery to deliver results, and stacking two hard days in a row breaks the principle. This is a rule taken directly from how certified coaches build training, and our AI follows it. If you cannot do a workout, Hiiro will rebuild the plan around the principles of endurance training rather than letting you override them.
Yes, you definitely can!
Hiiro coaches by RPE rather than fixed paces. We monitor your training data and, before the race, the AI coach delivers personalised pace recommendations based on the methodology our certified head coach uses with her athletes.
Choose your plan
Hiiro Annual
12 months subscription
1 week free trial
1 week free trial
£79.99
- (works out to £6.66 per month, save 33% vs monthly)
- For the price of 1 month with a human coach, you get a year with Hiiro
- Beginners: build from any fitness level to your first 42.2 km, with recovery sessions built into the plan
- Experienced runners: prepare for two marathons in a single subscription year
- AI coach 24/7, trained on certified coaching methodology, runs by RPE
- Plan rebuilds every week around your schedule and recovery
- Curated catalogue of marathon races worldwide
- Free race switch if life gets in the way
Hiiro Monthly
1-month subscription
1 week trial
1 week trial
£9.99
- Full Hiiro access with no annual commitment
- AI coach available 24/7, trained on certified coaching methodology
- Plan rebuilds every week around your schedule and recovery
- RPE-based training, the same scale used by certified coaches
- Curated catalogue of marathon races worldwide
- Switch to annual any time and save over £39
Your Best Marathon Starts Here
Built by runners. Coached by a real coach. Delivered through AI you can trust.
★ SHORTLISTED · UK STARTUP AWARDS 2026 · LONDON REGIONAL
★ SHORTLISTED · UK STARTUP AWARDS 2026 · LONDON REGIONAL
© All Rights Reserved. Hiiro LTD.