Terms of service

Last updated 1 August 2026

These terms are the agreement between you and Reckoner. They cover who may hold an account, what the service promises and what it deliberately does not, how lifting under a program a computer wrote is your own responsibility, and how either of us ends the arrangement. Using Reckoner means accepting them.

The short version.

Reckoner tells you how much weight to lift. It is not a doctor, a physiotherapist or a coach who can see you. The judgement in the gym stays yours.
You must be 13 or over, and the account is yours alone.
Early access is invite only. A place can be offered, and it can be withdrawn.
It is free, it is young, and it runs on one server. Expect it to change under you and to be down sometimes.
Your training log is yours. Export it whenever you like, delete it whenever you like, and deletion means gone.
Nothing here takes away a right your national consumer law gives you.

Who you are agreeing with

Reckoner is operated by Inner Skill Set, registered in the Netherlands with the Kamer van Koophandel under number 75619563. These terms call it "we" and "us". The service is the website at reckoner.fit, the Garmin Connect IQ watch app, and the server behind both.

You accept these terms by requesting a place, creating an account, or using any part of the service. If you do not accept them, do not use it. The current version is always at https://reckoner.fit/terms.

Who can use Reckoner

You must be 13 or over. Onboarding asks your date of birth and enforces that floor at signup, and it is the same floor Garmin sets for a Connect IQ account. If you are under 13, Reckoner will not build you a program, and you are told the date you can come back.

Reckoner also holds health data about you, on the basis of your explicit consent. In some countries a person under 16 cannot give that consent alone and needs a parent or guardian to give it with them. If that is your situation, get it before you fill in your profile.

One account belongs to one person. Do not share it, and do not hand out the sign-in codes we email you or the token a paired watch holds. Anything done through your account is treated as done by you.

Early access

Reckoner is closed to open signup. Asking for a code without an invitation puts your email address on a waitlist, and places are opened a batch at a time. A waitlist entry is not a promise of a place, and neither is an invitation a promise of one forever: we may withdraw access, close signups, or change how invitations work, and we will not always be able to say why in advance. Nothing has been paid for, so nothing is owed back.

Lifting is your responsibility

Reckoner is not medical advice. The training loads, progressions, calorie and macro targets and strength standards it produces are approximate and evidence-informed. They are a starting point to adapt. They are not a prescription, not a diagnosis, and not physiotherapy.

Reckoner cannot see you. It does not know your technique, your injury history, what you slept, or that today's bar speed is wrong. It reads the numbers you type and adjusts arithmetic. Deciding whether a prescribed set is safe to attempt is yours alone, in the moment, every time.

Strength training carries a real risk of injury. By using Reckoner you accept that risk knowingly, and you agree that a number on a screen never overrides your own judgement, a qualified coach who is watching you, or your doctor.

Talk to a doctor before you start, and stop and get advice if something hurts, especially if you are new to lifting, coming back from a layoff or an injury, pregnant, or managing a condition that training could affect. If you feel faint, short of breath or have chest pain, stop and get medical help.

Reckoner gives you a way to say so in the app: flag pain, a swap, too hard, or a skip, and leave a note. A flagged day is deliberately held back from automatic progression. Use it. The engine cannot account for what you never tell it.

What we promise, and what we do not

Reckoner is provided as it is. We are building it in the open and running it on a single rented server, so within reason we do not promise:

Availability. There is no uptime commitment. It will go down for maintenance, for deploys, and sometimes for reasons we did not plan.
That it stays the same. Features can change, move or disappear, and the way the engine progresses your lifts is exactly the kind of thing that changes as it gets better.
Results. Nobody can promise you a stronger squat. What you get out depends on what you do, how you recover, and a great deal that no program controls.
That the numbers are right for you. Standards, calorie targets and estimated one-rep maxes are population models applied to the handful of values you gave us.
That it runs forever. If we have to stop the service we will give you reasonable notice and time to export your training log first.

What we do commit to: the data handling set out in the privacy policy, an export you can take at any time, and a deletion that genuinely deletes.

Your account and your data

Your training log is yours. We claim no ownership of what you record, and we do not sell it, share it or advertise against it. You give us permission to store and process it only so far as running the service needs, which means showing it back to you and feeding it to the engine that writes your next week. What we hold, why, and for how long is the privacy policy, and it is part of this agreement. So is the cookie policy, which lists every cookie the site sets and everything else it keeps in your browser.

Analytics is optional and refusing it costs you nothing. Reckoner asks once whether it may count how the site is used, and the answer is remembered. Every feature works the same either way, nothing is withheld from you for saying no, and you are not asked again unless you go looking for the setting. Withdrawing later is as easy as accepting was, and both are on the cookie policy page.

You are responsible for the accuracy of what you enter. Reckoner acts on the numbers it is given, so a bodyweight typed in the wrong unit or a set logged at the wrong load moves next week's plan accordingly.

Keep a copy of anything you would hate to lose. Deletion is immediate and there is no backup to restore you from, which is the point, and it cuts both ways.

What you may not do

Use another person's account, or let another person use yours.
Attack the service: break into accounts that are not yours, probe for holes beyond what a normal client does, or try to knock it over. Finding something and telling us at hello@reckoner.fit is welcome and is not this.
Automate against the API in a way that degrades it for anyone else, or work around the rate limits on sign-in and pairing.
Resell the service, or run it as a paid coaching product for other people under your one account.
Use it for anything unlawful.

Ending it

You, at any moment: the Account page deletes the account, the profile, the whole training history, every paired watch's token and your waitlist entry, immediately and with nothing kept back. You do not need a reason and you do not need to ask us.

Us: we may suspend or close an account that breaks these terms, or that puts the service or another athlete at risk. Where it is fair to do so we will tell you first and give you a chance to put it right, and we will give you a way to export your log before it goes. We may also close accounts if we stop running Reckoner altogether, with the notice described above.

Liability

Reckoner is free, and there is a limit to what a free service can carry. To the fullest extent the law allows, we are not liable for lost training time, lost data, or indirect or consequential loss, and our total liability for any claim connected to Reckoner is limited to the amount you have paid us, which today is nothing.

Two things that limit does not touch, because it cannot and should not:

Death or personal injury caused by our negligence, and fraud or fraudulent misrepresentation. Nothing in these terms excludes or restricts either.
Rights your national consumer law gives you as a consumer. If a clause here conflicts with one of them, that law wins and the rest of these terms carry on.

Changes to these terms

If these terms change, the date at the top changes with them, and material changes will be announced in the app before they take effect. Carrying on with Reckoner after that is acceptance. If you would rather not accept, the Account page is always there.

Governing law

These terms are governed by Dutch law, and the courts of the Netherlands have jurisdiction. If you are a consumer resident elsewhere in the EU, this does not deprive you of the protection of the mandatory consumer law of your own country, and you may bring proceedings there.

If something has gone wrong, email hello@reckoner.fit first. A reply is faster than a procedure, and it is read by the person who can actually fix it.

Contact

Anything at all, including a question about these terms: hello@reckoner.fit.