Last Updated: September 26, 2026
mi1y.dev.studio, operated by Miłosz Dudka ("we", "us", or "our"), provides the RepMax - 1RM Calculator mobile application (the "App").
This Privacy Policy explains what information the App handles, how it is used, where it is stored, and how information may be processed by third-party services used by the App.
The App is designed to work without requiring you to create an account or provide information such as your name, email address, telephone number, or postal address.
By using the App, you acknowledge the practices described in this Privacy Policy.
Developer: Miłosz Dudka
Business/Studio Name: mi1y.dev.studio
Country: Poland
App: RepMax - 1RM Calculator
Privacy Contact: mi1y.dev.studio@gmail.com
If you have questions about this Privacy Policy or how information is handled by the App, you can contact us at the email address above.
RepMax - 1RM Calculator does not require you to create an account, log in, or provide directly identifying information.
The App allows you to enter and store information related to your training and fitness activities. Depending on the features you use, this may include:
exercise and workout information (including custom exercise names);
weights and repetitions;
RPE (Rate of Perceived Exertion) and RIR (Reps in Reserve);
estimated or calculated one-repetition maximum (1RM) results;
strength and performance results;
barbell target weights and plate inventory configurations;
body weight measurements;
training history, personal records (PRs) and related statistics.
This information is stored and processed locally on your device to provide features such as calculations, workout history, progress tracking, charts, and other functionality.
We do not operate a server-side user account system for this information, and we do not intentionally upload your locally stored training, fitness, or body weight information to our servers.
Your locally stored fitness information is not intentionally provided to Google Mobile Ads (AdMob) or RevenueCat.
We do not directly collect or maintain your training, fitness, strength, or body weight information on our own servers through the normal operation of the App.
We do not sell your personal information.
Because the App does not require an account, we generally do not have access to your locally stored workout history or other fitness information.
However, third-party services integrated into the App, such as Google Mobile Ads and RevenueCat, may independently process certain technical, advertising-related, or purchase-related information as described in Section 5.
The App may provide functionality to export and import your locally stored data using JSON files.
An exported JSON file may contain information stored in the App, including calculation history, exercise information, custom exercises, barbell and plate inventory configurations, body weight logs, RPE, RIR, repetitions, weights, strength results, and calculated fitness metrics. Exported files contain workout and calculator configuration data and do not include device-specific visual preferences (such as theme or accent colors).
Exporting or sharing a file is initiated by you.
When you choose to save, export, or share a file with another application, cloud storage provider, messaging service, or other third party, that service may process the file according to its own privacy policy and terms.
The App does not automatically upload exported JSON files to our servers.
You can delete locally stored App data using the deletion functionality provided by the App, where available. You may also clear the App's storage or uninstall the App using your device's operating system.
Deleting data from the App does not automatically delete JSON files that you have previously exported, saved, backed up, or shared.
The App uses third-party services to provide advertising and manage in-app purchases.
The App uses Google Mobile Ads SDK (AdMob) to display advertisements.
AdMob may automatically collect or process certain information from your device and your use of the App. Depending on the advertising configuration and applicable requirements, this may include information such as:
IP address;
device or advertising identifiers;
information about interactions with advertisements and the App;
diagnostic and technical information;
information necessary for advertising delivery, measurement, security, fraud prevention, and related purposes.
The locally stored training, fitness, strength, and body weight information described in Section 2 is not intentionally sent to Google Mobile Ads by the App.
For users in the European Economic Area (EEA), the United Kingdom, and Switzerland, where required, advertising-related consent is obtained and managed using Google's User Messaging Platform (UMP) or another applicable Google-certified consent management platform.
Depending on your consent choices and applicable law, advertisements may be personalized or non-personalized. You may be able to change or withdraw your advertising consent through the privacy or consent options provided by the App.
For more information about how Google processes information, please see Google's Privacy Policy:
https://policies.google.com/privacy
The App uses RevenueCat to manage and verify in-app purchases.
RevenueCat may process information necessary to provide its services, including purchase and transaction information, purchase status, an anonymous App User ID, and certain technical information associated with the App or device.
The App does not use RevenueCat to transmit or store your workout history, training data, body weight, RPE, RIR, or other fitness information.
RevenueCat may use an anonymous identifier to associate purchases with the App installation or user within its systems. We do not intentionally use this identifier to identify you by name or directly link it to your identity.
For more information about RevenueCat's privacy practices, please see:
https://www.revenuecat.com/privacy/
In-app purchases are processed through Google Play and Google's billing infrastructure.
When you make a purchase, Google may process information necessary to complete and manage the transaction, including transaction and purchase information.
We do not receive or store your full payment card or bank account information through the App.
Google's processing of information is governed by Google's applicable privacy policies and terms.
For more information, please see:
https://policies.google.com/privacy
We do not intentionally share your locally stored:
workout history;
exercise data (including custom exercises);
weights and repetitions;
RPE and RIR;
barbell target weights and plate configurations;
body weight;
strength results;
calculated 1RM results;
with advertising providers, RevenueCat, or other third parties through the normal operation of the App.
The exception is when you explicitly choose to export or share your data, as described in Section 4.
Third-party SDKs may independently collect technical, advertising-related, or purchase-related information as described in their respective privacy policies.
We do not maintain user accounts or user profiles containing your training or fitness information on our own servers.
Locally stored App data remains on your device until you:
delete the data using the App's deletion functionality;
clear the App's storage/data through your device settings; or
uninstall the App.
Exported JSON files remain wherever you choose to save, back up, or share them. These files must be deleted separately if you no longer want them to be retained.
Information processed by Google Mobile Ads, Google Play, and RevenueCat is retained according to the respective provider's policies, systems, and applicable legal requirements.
If you voluntarily contact us by email, we may retain the information contained in your message for as long as reasonably necessary to respond to your request, provide support, maintain relevant records, or comply with applicable legal obligations.
We take reasonable measures to protect information handled by the App.
Your locally stored training and fitness information is protected by the security mechanisms provided by your device and operating system. We do not operate a server-side database containing your workout history or fitness information.
When you export your data, the security of the resulting file depends on the device, storage location, applications, and services you choose to use.
Third-party services used by the App are responsible for their own security practices and infrastructure. Please refer to their respective privacy policies for additional information.
No method of electronic storage or transmission can be guaranteed to be completely secure.
Depending on where you live, you may have rights regarding personal information processed by us or by applicable third-party providers.
Depending on applicable law, these rights may include:
Right of access – you may request information about personal data we process about you.
Right to rectification – you may request correction of inaccurate personal information.
Right to deletion – you may request deletion of personal information processed by us, subject to applicable legal exceptions.
Right to restriction or objection – you may have the right to request restriction of or object to certain processing.
Right to withdraw consent – where processing is based on consent, you may withdraw your consent.
For information stored locally in the App, you can delete it directly using the App's data deletion functionality, by clearing the App's data, or by uninstalling the App.
For information processed by Google, Google Mobile Ads, Google Play, or RevenueCat, you may need to exercise applicable rights directly with the relevant provider.
If you have questions about information processed by us or would like to make a privacy-related request, contact us at:
mi1y.dev.studio@gmail.com
We may need sufficient information to verify and appropriately handle your request.
RepMax - 1RM Calculator is not specifically directed toward children.
The App does not require users to provide their name, email address, or other directly identifying information.
We do not knowingly collect personal information directly from children through an account or registration system.
Third-party services used by the App, including Google services, may apply their own requirements and safeguards regarding children's data and advertising.
If you believe that a child has provided personal information to us directly, please contact us at:
mi1y.dev.studio@gmail.com
RepMax - 1RM Calculator is intended for fitness, training, and informational purposes.
The App provides calculations and estimates related to strength training, including estimated one-repetition maximum values.
The information and calculations provided by the App are not medical advice and are not intended to diagnose, treat, cure, or prevent any disease or medical condition.
Users are responsible for deciding whether and how to use the information provided by the App and should exercise appropriate caution when performing physical activity.
We may update this Privacy Policy from time to time to reflect changes to the App, third-party services, applicable laws, or our privacy practices.
When we make changes, we will update the "Last Updated" date at the top of this Privacy Policy.
You are encouraged to review this Privacy Policy periodically to stay informed about how information is handled.
If you have questions, concerns, or requests regarding this Privacy Policy or the handling of your information, please contact:
mi1y.dev.studio
Miłosz Dudka
Poland
Email: mi1y.dev.studio@gmail.com