141kg
Legal

Terms of Service

Version: 2026-06-24-a

Effective from: 24 June 2026

1. About these terms

These are the terms on which 141kg.com makes its software platform available to you. They form a contract between you and us. By ticking the acceptance box in the app, you confirm you have read these terms and agree to be bound by them.

Us: 141kg Ltd, a company registered in England and Wales under company number 17241763, with registered office at Gables House, 62 Kenilworth Road, Leamington Spa, CV32 6JX. We trade as 141kg. You can contact us at admin@141kg.com.

You: the person who creates an account on the 141kg platform. If you are a personal trainer using the Tenant app, "you" means you in your business capacity. If you are a client of a personal trainer, or an individual using the Client app without a personal trainer, "you" means you in your personal capacity.

2. The platform

The 141kg platform is software for personal trainers (PTs) to plan and record training sessions, and for their clients to view and log their own training. It comprises three applications:

We make the Tenant app and Client app available to you under these terms. You access them over the public internet using a modern web browser. We may add, change, or remove features from time to time. Where a change materially reduces functionality you rely on, we will give reasonable notice.

3. Accounts

To use the platform you need an account. There are three ways an account is created:

You are responsible for keeping your login credentials secure and for any activity carried out under your account. PT accounts are protected by mandatory multi-factor authentication (MFA) using an authenticator app. You set this up the first time you sign in and cannot access the Tenant app without it.

You must be at least 18 years old to create a PT account. Clients and individual users must be at least 16 years old to use the Client app, and we recommend parental supervision for anyone under 18.

You must give us accurate information when creating your account and keep it up to date. We may suspend or close accounts where the information is materially inaccurate, where the account has been used in breach of these terms, or where we are required to do so by law.

4. What you can and cannot do with the platform

You can:

You cannot:

5. PT obligations regarding clients

If you are a PT, you are responsible for the relationship between you and your clients. The platform is a tool you use to provide your services; it does not replace your own contract with your clients.

Before adding a client to the platform, you must:

You acknowledge that for the personal data you enter about your clients, you are the data controller and we are your data processor. The terms on which we process that data for you are set out in our Data Processing Agreement, which forms part of these terms by reference and is available at https://legal.141kg.com/dpa/.

6. Pricing, tiers and payment

The platform offers three trainer tiers: Essential, Pro, and Elite. The price of each tier, the features it unlocks, and what it includes are shown on our pricing page when you subscribe, and may change from time to time. We will tell you before we begin charging your account, and billing for a paid plan starts from the date we activate it for you.

Client plans. If you are a client, you can use the Client app on a free plan or subscribe to a paid client plan (Pro or Elite) at the price shown on our pricing page. The active-client allowances, extra-client amounts, and automatic plan changes described below apply to trainer plans only.

Each trainer plan includes a set number of active clients:

Only active clients count towards your plan. Clients you have retired do not count.

Extra active clients. If your number of active clients goes above the number included in your plan, each additional active client adds a fixed amount per month to your subscription, as shown on our pricing page (currently £2 per active client per month). We add this automatically and charge it only for the part of the billing period in which that client is active.

Automatic move to a higher plan. Once your active clients reach a set number, your plan moves up to the next plan automatically, because the higher plan costs less than your current plan with the extra-client amounts added. When that happens, the higher plan's price replaces those extra-client amounts. This happens at 18 active clients on Essential, which moves you to Pro, and at 28 active clients on Pro, which moves you to Elite. You will never pay more through extra-client amounts than the price of the next plan up.

Confirming or cancelling a change. Before an added client results in a new charge or a move to a higher plan, we email you to confirm it. The change does not take effect for at least 24 hours. If you are happy with it, you need do nothing and it applies automatically. If you would rather not proceed, use the cancel link in that email. We then retire the client you just added, your plan and charges return to what they were, and no new charge arises from that client.

Moving to a lower plan. Your plan does not reduce automatically if your active client numbers fall. To move to a lower plan, ask us, and the change takes effect from your next renewal.

How and when we charge. We charge through our payment provider on your normal billing date. Where a change takes effect partway through a billing period, we apply it on a pro rata basis. We may change our prices; we will give you reasonable notice of any increase before it takes effect, and you may cancel if you do not wish to continue.

Referral discount. Where you have clients on a paid client plan, we reduce your monthly subscription by 1% for each such active client, up to a maximum of 20%. We recalculate this as your clients join, leave, or change plan. It applies only while you are on a paid trainer plan.

Opening discount. If you take up a limited-time opening offer, the discounted rate applies for as long as you stay an active paying member on a trainer plan, matching the offer shown at signup. It reduces the price of your plan while you subscribe. It has no cash value, cannot be exchanged for money, and is not a separate promise that continues after your membership ends. If your membership lapses or you cancel, the discount ends and we cannot reinstate it.

7. Availability

We aim to keep the platform available at all times but we do not guarantee uninterrupted service. We may need to take the platform offline for maintenance, security, or technical reasons. We will give reasonable notice where we can.

The platform depends on third-party services including our hosting provider (Vercel) and our database provider (Supabase). If those services fail, our platform may be affected.

8. Your content and data

You retain ownership of the data you put into the platform (your account details, your clients' details, workout data, body weight records, notes). You grant us a licence to host, process, transmit, display, and back up that data to the extent necessary to provide the platform to you.

We process personal data in accordance with our Privacy Notice at https://legal.141kg.com/privacy/. If you are a PT, the processing of your clients' personal data is also governed by our Data Processing Agreement at https://legal.141kg.com/dpa/.

PTs can export their own and their clients' data from inside the Tenant app. Clients can export their own data from the Client app, or request it by emailing admin@141kg.com. Where a client emails the request, we will provide it in a machine-readable format within 30 days.

9. Closing your account

You can close your account at any time by emailing admin@141kg.com. We will delete your account and associated data within 30 days of closure, except where we are required to retain certain information for legal, accounting, or regulatory reasons.

If you are a PT and you close your account, your clients' data on the platform will be deleted at the same time unless you instruct us otherwise. You are responsible for telling your clients that their access to the Client app will end.

We may close your account if you breach these terms or if your account is inactive for more than 24 months. We will give you reasonable notice and a chance to export your data.

If we stop providing the platform. We may decide to cease trading or to shut down the platform. If we do, we will give you at least 30 days written notice by email to your registered address. During the notice period you can export your data using the in-app download tools, or request a copy by emailing admin@141kg.com. At the end of the notice period we will permanently delete the database and all personal data it holds, except records we must keep for legal, accounting, or regulatory reasons. After deletion we cannot recover your data or your account.

On the cessation date your membership, your plan, and any opening or referral discount end. We will not pay compensation for the loss or future value of any discount, including the opening discount. Paid plans are billed monthly: we will not charge you for any period after the cessation date, and we will refund any part of the current month you have paid for and not used.

10. Our liability

Nothing in these terms limits or excludes our liability for:

Subject to that:

The platform is a record-keeping tool, not a medical, fitness, or coaching service. We do not provide training advice. Decisions about exercise, weight, nutrition, or recovery are between you and your PT (or your own judgement). We are not responsible for the consequences of those decisions.

11. Indemnity

If you are a PT, you agree to indemnify us against any claim brought by your clients or any third party arising from your use of the platform, including any breach by you of these terms or of UK GDPR. This does not apply to claims caused by our own breach of these terms.

12. Changes to these terms

We may update these terms from time to time. When we do, we will:

If you do not accept the updated terms, you will not be able to continue using the platform. You can close your account and request your data at that point.

13. Governing law and jurisdiction

These terms are governed by the laws of England and Wales. Any dispute will be subject to the exclusive jurisdiction of the courts of England and Wales.

14. Contact

For questions about these terms, contact us at admin@141kg.com.