1. Plan your progress
Slek, the app that helps you plan and follow your training!
2. Get down to it
3. Analyse and improve
Slek for athletes
For the athlete without a coach
You analyse your training easily, without depending on anyone
- Really understand your progress: detailed analysis of every workout, advanced stats (Foster, TRIMP and the rest)… Not just numbers, but readings you can act on to keep improving without picking up an injury.
- Total freedom: change watch or bike computer whenever you like, Garmin, Suunto, Coros, Polar, Wahoo, Hammerhead… they all work. Nobody locks you into an ecosystem.
- Your workouts come in on their own: no more typing everything by hand. Your watch records the workout, Slek collects it, and all you do is read clear data.
- It costs nothing at all… as long as you are not after planning. Otherwise you count as a coached athlete… coached by yourself!
For the coached athlete
You are guided, not swamped!
- An overview of your week: you know exactly what is coming.
- Clear instructions for every workout: nothing to look for, it is all there and to the point.
- Answer on the spot from your phone: your feedback says more, so your training fits you better:
- After each workout: “How did it go?”
- Every morning: “How did you wake up feeling?”
- At every check-in: “How are you feeling overall?”
- Visual analysis of your workouts: “Did I hold the pace on the last set?” → the charts answer that at a glance.
- Enter your availability in a couple of clicks: your coach can work around your schedule, instead of the other way round.
- Stats on your training: yearly volume, load, progression… you see the long-term picture.
- Yes, you are the one paying for the Premium subscription, but that plan lets you share your data:
- between several coaches (from your club or clubs, from the sports programme at school…)
- with your nutritionist, your physio…
- in short, the people who work with you day to day, who need to know where you stand, but who would never take out a subscription just for that!
For the athlete who trains in a group
Train at lunchtime with your workmates!
- A training squad is a group where one person plans the workouts and offers them to the others: the lunchtime run with colleagues, Tuesday evening intervals at the track, the Sunday long run.
- You join it with a plain link: paste it into the team chat and it is done.
- Your colleagues do not see your workouts. Not your activities, not your stats, not your calendar. Even the person organising has no access: they see who is in the group and how many people accepted each workout, and that is all.
- And you see nothing of the others either: no leaderboard, no comparison. What gets shared is the workout, not your private life.
- One Premium subscription is enough for the whole group: the one who creates the squad. The others join, accept or decline for free.
- Each workout arrives as an invitation: “Join” or “Decline”, and you can change your mind. Busy week at work? You decline, and your calendar stays clean.
- If you accept, the workout lands in your calendar and goes out to your watch or bike computer: you run the sets without thinking about them, even if you set off ten minutes after the others.
- On Premium? You adapt your own copy just for yourself: 3 × 6’ instead of 4 × 6’, or you move it to Thursday, without changing anything for the group.
In short
For the athlete on their own: you stay in charge of your training, without depending on anyone, with data you can use. For the coached athlete: you are guided, you improve, you give feedback easily and without pressure. For the athlete who trains in a group: you get the workout, you just say whether you are coming, and your data stays yours.
Frequently asked questions from athletes
Is Slek free for an athlete?
Slek’s Free plan costs nothing and never expires: it covers the complete analysis of your workouts, your statistics, your best performances, syncing with your watch and the export of all your data. The Premium subscription, at €5 incl. VAT per month billed annually (€60 incl. VAT per year), adds planning, coaching and the AI assistant.
Do you need a coach to use Slek?
No. Plenty of athletes use Slek on their own, to analyse their workouts and follow their training load. If you want to plan your workouts in advance, you move to Premium: you then count as an athlete coached by yourself. And if a coach works with you, their own account stays free.
Does Slek pick up my activities automatically?
Yes. Slek connects to Garmin, Suunto, Coros, Polar, Strava, Wahoo and Hammerhead, and your activities come through with no manual entry at all. They sit next to what was planned, so you can compare completed against planned, workout by workout.
Can I get my data back if I stop?
Yes. Import and export of all your data are included from the Free plan onwards, so your data is never held back. If you stop Premium, you take everything with you and drop down to the free plan. Only your future planned workouts stop being readable, since that is what the subscription pays for.
See how Slek supports athletes day to day
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Features
Release notes: July 2026
It has been busy at Slek since June, with two new features that change quite a lot: training squads and a graphical builder for guided workouts. Until now Slek offered individual coaching: one coach, one athlete, complete monitoring. That is perfect for personal support, but far too much for a club that simply wants to send Tuesday night's workout to its members […]
Features
Release notes: June 2026
The last few weeks have been (very) busy at Slek. We are not going to write an article for every change, but here is the round-up of things not to miss since the April notes. And we may as well warn you now: there is one big announcement. 🎉 On the programme: two-way calendar sync with Google, Apple or Outlook, and more […]
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