Privacy policy

Last updated: October 14, 2026.

1. Data controller

PesaFit (hereafter, "the site") is the controller of the personal data collected through this website. You can reach us at jesus.narvaez.tames@hotmail.com.

2. Data we collect

• Calculator inputs: the measurements you enter into our calculators (weight, height, age, etc.) are not sent to our servers. They are processed locally in your browser.
• Optional profile: if you use the "Your profile" bar in the calculators, your basic data (sex, age, height, weight, activity level and estimated body-fat %) is stored only in your browser's localStorage to auto-fill calculators on future visits. It is not sent to any server or shared with third parties. You can erase it at any time with the "Delete my data" button or by clearing site storage from your browser.
• Analytics: we use Google Analytics 4 with anonymised IP to understand site usage. It does not identify individual users.
• Advertising: we display Google AdSense ads which may use cookies to personalise advertising. You can manage your preferences at adssettings.google.com.
• Affiliates: we participate in the Amazon affiliate program. When you click an Amazon link, Amazon may install cookies in your browser.
• Premium account: if you sign in with Google to subscribe to premium, we store that Google account id, the email, the subscription reference, its status and the renewal or end dates, so premium stays active when you change devices. Weight, conditions, intolerances, your goal, the diet, the training and what you log (sets, kilos and kilometres) stay in the browser and are not sent. The printable PDF is also generated in your browser. To paint the premium theme without waiting, the browser remembers whether the account is premium and when that was checked; it is cleared when you sign out. Google authenticates the sign-in; Lemon Squeezy processes the payment and manages the subscription. You can ask us to delete that row by emailing the contact address.
• Menstrual cycle (optional): if you turn on cycle tracking in premium, your period dates, cycle length and whether you use hormonal contraception are stored only in your browser's localStorage. This is health data: it is not sent to any server, it goes into the backup file you download, and it is erased with "Delete my data" or from the cycle settings.
• AI logging (with a Google account, optional): if you use “Log it with a photo” in the diary, the photo or text you enter, together with a summary of your meal plan for the day, what you have logged that day, your calorie and macro target and your intolerances, is sent to Anthropic as a data processor to estimate the meal. We ask you before the first use. The photo is downscaled and stripped of its metadata (location included) in your browser before it leaves. We don't store the photo, the text or the result: only a usage counter per account and day, under a hashed identifier, which expires after two days. We don't send your weight, health conditions or cycle data. The result is saved only in your diary, in this browser.
• Donations: if you support the project, Lemon Squeezy processes the payment. We do not store the order or link it to a Google account. A donation does not activate premium.
• Newsletter: the newsletter is currently Spanish-only. If you subscribe, we store your email address, the subscription date and the source page that brought you to the form, with the sole purpose of sending you the editorial emails. We use EmailOctopus (Octopus Marketing Limited, United Kingdom) as our data processor. EmailOctopus also handles the double opt-in (sends you a confirmation email) and unsubscribes. You can unsubscribe any time using the link at the bottom of every email. Data is kept until you unsubscribe or until we bounce your address 3 consecutive times (automatic list hygiene).

3. Legal basis

We process data based on your explicit consent (analytics cookies, advertising cookies, newsletter signup and AI logging), on performance of the contract when you subscribe to premium, and on the legitimate interest of keeping the site operational.

4. Your rights

You may exercise your rights of access, rectification, erasure, objection, restriction and portability by emailing jesus.narvaez.tames@hotmail.com. You may also file a complaint with the Spanish Data Protection Agency (AEPD) or, if you reside in the EU/EEA, with your local data-protection authority.

5. Cookies

For details about the cookies we use, see our cookie policy.

6. Changes

We may update this policy. The new version will be published here with an updated date stamp.