An AI coach that lives in your chat app

Available 24/7 on Telegram, Messenger and WhatsApp.

Free during beta · Founding members lock in 50% off for life

Start free on Messenger

or Telegram · WhatsApp

Built and tested with elite endurance athletes in Copenhagen.

tendo ● online

I want to run a sub-45 10K in May

Got it — here's your 8-week plan. This week: easy 5km Tue, tempo Thu, long run Sun.

Tuesday, 7:42 PM

Just saw your run on Strava — 5:08/km with a negative split. Right on target. 🎯

Should I push harder Thursday?

Not yet. Thursday is 6×400m at 4:50/km. Keep building. 💪

How it works

Step 1

Chat about your goal

Tell tendo what you're training for, your race date, and where you're at right now. It takes about two minutes.

Step 2

Get a plan that adapts with you

Tendo builds a real training plan for your goal. Missed a week? Got sick? Just tell your coach — the plan adjusts automatically.

Step 3

Automatic feedback after every session

Connect Strava and tendo sees your workouts instantly. No logging, no screenshots — just train and get feedback.

Whatever you're training for

Running

Triathlon

Hyrox

Cycling

Strength

Built by athletes, not a product team

I built Tendo because I was frustrated with generic training plans that never adapted. I wanted a coach that actually listened — one that adjusted when life got in the way, and that got smarter the more I trained. So I built one.

Over the past months, I've iterated on Tendo with feedback from elite endurance athletes in my network here in Copenhagen — marathoners, triathletes, Hyrox competitors. Their input shaped everything from how the plan adapts to how feedback is delivered. Now I'm opening it up in beta.

— Tobias, founder

Questions you might have

How is this different from Runna or TrainingPeaks?

Those are great tools, but they give you a static plan in a separate app. Tendo lives in your existing chat app, adapts conversationally when things change, and gives you automatic feedback after every session via Strava — no manual logging. It's been tested and refined with feedback from elite endurance athletes, not built in a vacuum.

Is my Strava data safe?

Yes. Tendo uses read-only access to your Strava activities — it can see your workouts but can never modify or delete anything. Your data is only used to personalise your coaching. Read our privacy policy for full details.

What happens when beta ends?

We'll launch paid plans, but anyone who joins during beta locks in 50% off for life as a founding member. No credit card is needed to start — you'll only be asked to pay when (and if) we launch paid tiers.

Does this actually work or is it just ChatGPT?

Tendo is purpose-built for athletic coaching. It uses a structured training model under the hood — not a generic prompt wrapper. It maintains your training history, understands periodisation, reads your Strava data automatically, and adapts your plan based on real performance. The system was shaped by months of iteration with competitive athletes who gave candid feedback on what worked and what didn't.

What sports and levels does it support?

Currently: running, triathlon, Hyrox, cycling, and strength training. Tendo works whether you're a complete beginner building your first 5K plan or an experienced athlete targeting a specific time. The plan complexity scales with your level and goals.