Terms of use

Last updated: 15 September 2026

These terms are the contract between you and us when you use Zentalog, on the web or in the app. We have written them to be understood. By creating an account you accept them, together with the privacy policy. The Spanish version prevails if there is any discrepancy.

1. Who we are

Zentalog is a service of Gextiona Interproducción, S.L., tax ID B87967592, Avda. de las Provincias 36, posterior, oficina C, 28941 Fuenlabrada (Madrid, Spain), registered in the Madrid Companies Register, volume 3820, folio 60, sheet M-659211. Contact: info@gextiona.art.

2. What Zentalog is

An app to log and track your training: routines, sets, cardio, measurements and progress, with weight and progression suggestions, friends, shared workouts and the option of a coach giving you routines. It is for personal use, not professional or commercial use, except for what the app itself offers coaches.

3. Your account and the minimum age

• You must be at least 14 years old to create an account. We ask for your date of birth to check this and to adapt training to your age: it must be your real one.
• Under 14, Zentalog can only be used with an account created by your parent or guardian from their Family plan. That person gives consent, is responsible for how you use the app and can ask us to delete your account at any time.
• Your account is personal: one per person, with true details, and it may not be lent or sold. Keep your password safe and tell us if you think someone has accessed your account.

4. Your health comes first

• Zentalog is not a medical service and does not replace a professional. Suggestions for weight, sets, rest or progression are calculated automatically from what you log; they are guidance only and do not know your health condition.
• Before you start training, especially if you have an injury or illness, are pregnant, take medication or have not exercised for a while, talk to your doctor.
• Stop if you feel pain, dizziness or anything unusual. Mind your technique, warm up, use machines as instructed and ask for help at your gym if you do not know how to do an exercise.
• Coaches who use Zentalog work for themselves, not for us: what they recommend is their responsibility.

5. Free trial, plans and prices

• When you confirm your email you get a 14-day free trial, no card needed. Nothing is charged when it ends: if you want to continue, you choose a plan.
• There are Individual, Couple (2 people) and Family (up to 5) plans, monthly or yearly. The price is the one shown on the plans screen before you pay, VAT included.
• Card, Apple Pay and Google Pay payments are processed by Stripe; we never see your card. We email you the invoice.
• In Couple and Family plans the holder pays and invites the others. Members have access while the holder's plan is up to date; the holder can remove a member and any member can leave. Each person's data is their own: the holder does not see the others' workouts.
• Discount coupons apply under the conditions stated for each one.
• Recommending pays off. Anyone who signs up with someone else's link gets a 30-day trial instead of 14. When that person pays their first fee, whoever recommended them earns a free month: it is deducted from their next payment or, if they have no subscription, 30 days of access are added (if they are on someone else's plan, the month is kept until they have their own). One month per person recommended and no more than 12 a year. It cannot be exchanged for money, does not apply to accounts that do not pay and cannot be used to recommend yourself with another account; if we detect abuse, we may cancel the months obtained that way.
• If you subscribe through Google Play or the App Store, billing, renewal, cancellation and refunds are also governed by that store's terms.

6. Renewal, cancellation and failed payments

• Your subscription renews automatically at the end of each period (month or year), at the current price.
• If we change the price, we will tell you at least 30 days in advance, and you can cancel before it applies.
• You can cancel at any time from Account › Your plan › Manage my subscription. No further renewal is charged and you keep access until the end of the period you have already paid for.
• If a payment fails, you have 3 days to fix it before losing access. Your data is not deleted: you can download it and come back whenever you like.

7. Right of withdrawal

As a consumer, you may withdraw from the contract within 14 calendar days of subscribing, without giving any reason. When you pay you expressly ask for the subscription to start straight away; so if you withdraw, we refund what you paid minus the proportional part for the days you have already used, within 14 days at most and using the same payment method.

To withdraw, email info@gextiona.art from your account's email address stating it clearly; you may use the model form at the end of these terms. Withdrawing cancels the subscription. Later renewals do not open a new withdrawal period, but you can always cancel (section 6).

8. Your data and what you publish

• What you log is yours. You can download it as CSV from Account at any time, and delete your account from Account › Delete my account.
• You allow us to store and process that data only to provide the service, as explained in the privacy policy.
• Your name, @username and photo must not impersonate anyone or be offensive, unlawful or someone else's without permission. We may ask you to change them or remove them.

9. Acceptable use

You may not: access other people's accounts or try to get round security; copy data from the app automatically; bother, harass or deceive other users; use Zentalog to send advertising; resell or sublicense the service; or copy, decompile or modify the app, except as the law allows. If you are a coach, you may only see the data of people who have accepted your invitation and must keep it confidential.

10. The service and changes to it

• We do our best to keep Zentalog working at all times, but there may be interruptions for maintenance, faults or reasons beyond our control. If a long interruption stops you using what you paid for, write to us.
• The app improves over time: we may add, change or remove features. During your subscription we will provide the updates needed for it to keep working as described. If a change significantly harms you, we will let you know and you may cancel with a refund of the unused part.

11. Liability

We are liable for our obligations as the law provides. We are not liable for harm resulting from not following section 4, from use of the app contrary to these terms, from what coaches recommend or from causes beyond our control. Nothing in these terms limits your statutory rights as a consumer or our liability where the law does not allow it to be limited, such as wilful misconduct, gross negligence or personal injury.

12. Suspension and leaving

• You can leave Zentalog whenever you like by deleting your account; any subscription is cancelled immediately.
• We may suspend or close an account for a serious breach of these terms, giving notice and explaining why whenever possible. If we close your account without any breach on your part, we refund the unused part of what you paid.

13. Intellectual property

The app, its design, texts, exercise catalogue, illustrations and the Zentalog brand belong to Gextiona or its licensors (credits are under Account). While you have an account you may use them for what the app is for, without copying or reusing them outside it.

14. Changes to these terms

If we change them significantly, we will tell you in the app or by email at least 15 days before they apply and ask you to accept them. If you do not agree, you can cancel your subscription and delete your account.

15. Governing law and complaints

These terms are governed by Spanish law. If you have any problem, write to us first at info@gextiona.art: we want to fix it. If we cannot, you may contact the consumer services where you live or the courts of your place of residence.

Model withdrawal form

(Complete and return this form only if you wish to withdraw from the contract.)

To Gextiona Interproducción, S.L., Avda. de las Provincias 36, posterior, oficina C, 28941 Fuenlabrada (Madrid, Spain), info@gextiona.art:

• I hereby give notice that I withdraw from my contract for the provision of the following service: Zentalog subscription (plan: …).
• Subscribed on: …
• Name: …
• Account email address: …
• Signature (only if this form is sent on paper).
• Date: …