Enlyzr

MyDisweight: privacy policy

What MyDisweight stores, what can leave your device, and how to reach us.

Last updated: October 2026

Introduction

Enlyzr ("we", "our", or "us") makes MyDisweight, an Android app that keeps a personal record of meals, water, fasts, body measurements and heart-rate recordings. This Privacy Policy explains what the app stores, where it is kept, which permissions it uses and what can leave your device.

Much of what the app keeps is information about your health. The app keeps it on your device. It has no account, no server and no advertisements, and it does not send these records to us. What does leave the device is listed under Permissions and what leaves your device: a product lookup by barcode, diagnostics that Google's scanner component sends to Google, the backup and export files you make, and Android's own backup if you have it turned on.

Information the app stores

All of the following is kept in the app's own storage on your device.

  • Meals and food: the days you plan, their meals and items with portions and nutrition values, what you ticked off as eaten, and the foods, dishes, dish names and reference days you created yourself.
  • Water and drinks: the water you log and the drinks you name, with their amounts.
  • Fasts: for each fast its start, its end and its planned length, and the history of completed fasts.
  • Cold showers: for each day whether you recorded one, skipped it or recorded nothing, and for each week the water temperature you typed in.
  • Body measurements: weight, hips, waist, chest and height with their dates. From them and from your profile the app works out figures such as BMI, the waist-to-height and waist-to-hip ratios, basal metabolic rate and daily energy needs.
  • Profile and goal: sex, birth year, activity level and daily water goal; the goal you chose (losing weight, maintaining, building muscle or gaining weight), its pace, and the dates on which you switched goals. If you give the profile a home location (a latitude and a longitude), it is stored rounded to 0.1° and used only to work out dusk and dawn for one chart.
  • Heart recordings: for each session you record with a Polar H10 chest belt or a Polar Loop wrist band: when it started and ended, the heart rate for every second with the beat-to-beat (RR) intervals, the ECG strips you captured or that were captured automatically, your markers and their labels, a note and a temperature if you typed them, whether a fast was running when the session started, and the band's name, device identifier, firmware version and battery level. If a wrist band took part, its beat intervals with their quality flags and its skin-temperature readings are stored with the session.
  • Data synced from the wrist band: what the Loop band recorded by itself and the app has fetched from it: sleep with its phases, night pulse, heart-rate variability, breathing rate, skin temperature, heart rate through the day, steps, distance, activity through the day and the band's energy figures.
  • Your activities: the activities you name yourself, the amounts you enter for each day, and a yearly target if you set one.
  • Tracks: routes you taught the app for automatic ECG capture. A track has a name, a trigger radius, a capture length and a minimum speed, and a list of points. Each point holds a position (latitude and longitude), the accuracy of that position and the time you saved it.
  • Settings: theme, colour, the connection mode for your bands, and the other choices on the Settings screen.

The app reads the time of your phone's next alarm to work out a suggested bedtime on the Home screen.

The food catalogue (NutriDatabaze) and the reference days are built into the app. Searching them sends nothing anywhere.

Permissions and what leaves your device

Permissions

MyDisweight has the following Android permissions. Android asks you for location, Bluetooth and notifications; you can refuse each of them and use the rest of the app.

  • Nearby devices (BLUETOOTH_SCAN, BLUETOOTH_CONNECT): to find your Polar band and to connect to it, and to receive the heart rate a belt broadcasts. The scan permission carries the flag that tells Android it is never used to work out your location. If you switch on the daily Loop sync, the app also fetches new data from the wrist band once a day in the background.
  • Location (ACCESS_FINE_LOCATION, ACCESS_COARSE_LOCATION): only for tracks. The app asks for it when you tap Allow location on the Tracks card, not before. It reads your position while a recording is running and a track is armed, or while you are teaching it a track, and at no other time. It uses the position to save the points you choose and to notice when you pass one of them, so that it can capture an ECG strip there. Besides the points you saved, the app's records hold no positions: the marker an automatic capture leaves in a session says which point was passed and when.
  • Foreground service (FOREGROUND_SERVICE, FOREGROUND_SERVICE_CONNECTED_DEVICE): so that a heart-rate recording goes on when the screen is off, when you switch to another app, or when you swipe the app away. While it runs, Android shows the notification Recording heart rate.
  • Foreground service with location (FOREGROUND_SERVICE_LOCATION): so that the same recording can read your position for an armed track, or for a track you are teaching it, while the app is not on screen.
  • Notifications (POST_NOTIFICATIONS): for the recording notification, which shows the elapsed time and the current heart rate and has buttons to set a marker and to stop, and for two fast notifications, at about 24 hours and when the planned length is reached. The recording notification can be seen and used on the lock screen. If you refuse notifications, recording and fasts work as before, without them.
  • Vibration (VIBRATE): one short buzz when an automatic ECG capture starts. Vibrate on automatic capture in Settings turns it off.
  • Internet (INTERNET): for the product lookup by barcode, described next.
  • Run at startup, view network connections, prevent the phone from sleeping (RECEIVE_BOOT_COMPLETED, ACCESS_NETWORK_STATE, WAKE_LOCK): these three come with the Android library that runs the app's background work: the daily sync with the wrist band, the weekly backup and the two fast notifications. They give access to none of your data.

The app has no camera permission, no contacts permission and no microphone permission.

What the network is used for

The app itself opens a connection in one case: when you tap Scan barcode in the food form and a code is read. It then asks the Open Food Facts database (world.openfoodfacts.org) for that product over an encrypted connection. The request carries the barcode number and the app's name and version. As with every internet request, the server also sees the internet (IP) address your connection comes from. What comes back is the product's name and nutrition values, which fill in the form. Nothing from your records is part of the request.

Diagnostics from Google's scanner component

The label scanner and the barcode scanner are built with Google's ML Kit. ML Kit reads the picture on the device; the picture is not sent anywhere. ML Kit does send Google diagnostic and usage information of its own: the device model and app version, an identifier for the installation, performance figures and error codes. Google's privacy policy applies to that information. It cannot be switched off inside the app, and none of your records are part of it.

Backup files and exports

These are copies you make, or that the app makes on your device:

  • Export data in Settings writes all of the app's data into one file at the place you choose: planned days, check-offs, measurements, foods, fasts, heart sessions with ECG strips and markers, and learned tracks with their positions. Only the built-in food catalogue is left out.
  • Automatic backup: once a week, and when you tap Back up now, the app writes the same kind of file into the folder Documents/MyDisweight on your device. It deletes its own automatic files from that folder when they are 60 days old.
  • Session exports (CSV, RR and a complete session file), the shopping list and the monthly report are handed to Android's share sheet. They go to the app or person you pick there, and nowhere else.

A backup file is an ordinary text file in JSON form. Whoever can open the file can read what is in it, so keep it as carefully as the records themselves.

Android backup

MyDisweight allows Android's backup and excludes nothing from it. If you have Android backup turned on, the app's data, with the health records and positions listed above, is included in your device's Google backup and in a transfer to a new device. You turn this on or off in your device's backup settings, not in the app.

Third-party services

  • Open Food Facts: the product database asked when you scan a barcode, as described above. It is run by others, and its own terms apply to the request.
  • Google ML Kit: reads the nutrition table when you use Scan label, and its code scanner, which runs in Google Play services, reads the barcode when you use Scan barcode. Both are read on the device. ML Kit sends Google the diagnostics described above.
  • Google Play services: its location service supplies the positions used for tracks.
  • Polar's Bluetooth library: the app talks to the bands directly over Bluetooth with it. The app works without the Polar Flow app; only the belt's broadcast mode needs one switch set there once.
  • NutriDatabaze.cz (ÚZEI): the source of the built-in food catalogue. The data is inside the app; no connection is made to look a food up.

The Google and Polar components are their makers' software. This policy describes what the app itself does with your data.

Children's privacy

MyDisweight is intended for adults. We do not knowingly collect personal information from children or from any other user: the app does not send its records to us.

Health disclaimer

MyDisweight is not a medical device. It does not diagnose, treat, cure or prevent any disease, and nothing in it is medical advice.

Data deletion

Inside the app you can delete single things: a day's records, a food, a measurement, a fast, a heart session, a marker, a track. You can delete everything the app stores on your device by:

  • Clearing the app's data through your device's Settings > Apps > MyDisweight > Clear Data
  • Uninstalling the application from your device

Backup and export files are ordinary files outside the app: the ones you exported, and the automatic ones in Documents/MyDisweight. Clearing the app's data or uninstalling the app may leave them where they are; delete them yourself when you no longer want them. If Android backup is turned on, the backed-up copy is managed through your device's backup settings. Files you shared are in the hands of whoever received them.

Changes to this policy

We may update this Privacy Policy from time to time. Any changes will be reflected in the "Last updated" date at the top of this policy. We encourage you to review this policy periodically.

Contact us

If you have any questions about this Privacy Policy, please contact us at enlyzr@gmail.com.