FAQ

After eating, glucose is absorbed from food into the blood and then into the interstitial fluid. Since glucose reaches interstitial fluid a little later than the blood, sensor readings may lag slightly behind blood glucose readings.

Compared to traditional blood glucose measurement methods, CGM can detect hidden high and low glucose values on the glucose curve that traditional methods may miss—for example, post-meal hyperglycemia and nighttime asymptomatic hypoglycemia.

A continuous glucose monitoring system helps you understand and notice various processes in your body related to glucose levels:

• How blood sugar is affected by factors such as types of food consumed, different forms of physical activity, treatment plans, mental factors, etc.
• Better understanding of postprandial hyperglycemia, “dawn phenomenon,” Somogyi effect, etc., which are difficult to detect with traditional blood glucose monitoring methods.
• Helps in creating personalized treatment plans
• Improves treatment adherence
• Provides a visual tool for diabetes education, etc.

BENEFITS IN DIABETES CARE:

• No need for finger-prick blood sugar measurements*

The LinX CGM automatically performs accurate blood sugar measurements without calibration. This eliminates the need for finger-prick tests with a glucometer, making diabetes management more convenient and painless.

• Blood sugar readings easily and quickly visible on your phone

The CGM works continuously (even while you sleep) and lets you check your glucose levels anytime through the mobile app. The app shows your current glucose level, past readings (up to the last 15 days), as well as the direction (rising or falling) and speed of change.

• Better diabetes control

Achieve your treatment goals! With CGM you get a detailed overview of your glucose levels and how different factors (stress, diet, exercise) affect your blood sugar at different times. This extra data helps you make better treatment decisions and respond in time to avoid rapid or sharp glucose fluctuations.

• Hypoglycemia prevention day and night

If set up, the LinX app alerts you when your blood sugar is dropping below your chosen safe level. This lets you act quickly to prevent dangerous hypoglycemia. You can set your threshold and customize the alert sound and vibration.

• Increased safety and peace of mind

Knowing that CGM tracks your blood sugar at all times allows you to go about your day with less worry and sleep better at night. Users of the LinX CGM have reported increased security, improved quality of life, and better diabetes control.

*Finger-prick testing is necessary if your symptoms or expectations do not match the CGM readings.

It’s normal for BGM and CGM readings to differ sometimes. The most common reasons:

• Incorrect finger-prick test (dirty hands, alcohol or food residue on skin, etc.)
• CGM readings may lag 5–15 minutes when glucose levels are rising or falling sharply.
• A low CGM reading may occur if pressure is applied to the sensor for a long time (e.g., sleeping on it).

You can calibrate the CGM sensor if readings are consistently higher or lower compared to several finger-prick tests.

• Calibrate only when blood sugar is stable! If glucose is rising or falling quickly after eating or medication, calibration can cause incorrect CGM readings.
• Calibration is not recommended on the first day of sensor use, and should not exceed once per day. You can log manual finger-prick readings in the app if you wish.

ANDROID:

• Requires software version 10.0 or newer; on Huawei phones, HarmonyOS2.
• Bluetooth and location must always be turned on.
• The app must have highest-level access permissions (set location to “Always allow”).
• On Xiaomi phones, data retrieval may fail. To fix this, close the app and restart Bluetooth.
• Some Xiaomi models emit a fast beeping sound when Bluetooth scanning is active and notify you about energy usage each time you open the app.
• If connection fails, try again.

IOS (software version 14 or newer):

• If you don’t get notifications, make sure system notifications are enabled.
• If connection fails, try again.

Check LinX device compatibility before buying a new phone or updating your operating system. Update the LinX app if necessary to ensure full compatibility.

Using the LinX continuous glucose monitor (CGM) can help you make better diabetes management and treatment decisions thanks to the detailed data it provides. The data allows you to spot patterns and factors that personally affect your glucose levels.

The CGM sensor measures glucose in interstitial fluid, while glucometers measure glucose in blood.

Sometimes BGM and CGM readings don’t match. This is normal and is caused by the lag in glucose reaching interstitial fluid. Blood glucose changes first, then after a few minutes the change shows in interstitial fluid readings from the CGM sensor.

If a CGM reading does not match your symptoms, it’s recommended to do a finger-prick test with a glucometer. If the glucometer reading doesn’t match the CGM, make sure the glucometer test was done correctly and base your treatment decisions on the glucometer value.

The continuous glucose monitoring system (CGM) allows the user’s glucose levels to be tracked continuously.

During insertion, a tiny sensor goes under the skin. An adhesive patch holds the sensor in place so it can measure glucose levels in the interstitial fluid, which are then transmitted to the mobile app.

The LinX continuous glucose monitor (CGM) is a device that tracks the wearer’s blood sugar level in real time, 24 hours a day. The CGM transmits glucose readings to a connected mobile app, allowing the user to view blood sugar levels, trends, and rate of change. The LinX CGM can also alert the user if blood sugar drops too low or rises too high.

The applicator needle must pass through the top skin layer to insert the sensor into interstitial fluid. Small blood vessels are in this layer, and puncturing one may cause bleeding.

• Bleeding can also occur if the sensor is inserted too deep or into muscle. Avoid applying too much force. Insertion into muscle may cause pain, bleeding, and damage to the sensor.

Seek medical help if necessary.

• Press on the site for a few minutes until bleeding stops. Continue using the sensor and monitor readings. If finger-prick and CGM values differ significantly, replace the sensor.
• If bleeding continues after applying pressure for several minutes, remove the sensor. If not on blood-thinning medication, insert a new sensor at a different site.

The app must be paired with the sensor code from the package. If you lose it, you’ll need a new sensor—each has a unique code.

The sensor code is on the package, a 6-digit serial number. It’s needed for pairing. Normally, pairing is automatic via Bluetooth, but if multiple sensors are detected nearby, the app may request the code for security. In that case, scan the QR code or enter the SN manually.

The automatic applicator makes insertion more comfortable.

Alerts can be enabled during initial setup. Follow the on-screen instructions. To enable or adjust alerts later, go to Home → Account → “Reminder Settings.”

Note! LinX alerts do NOT override your phone’s settings. If your phone is in silent mode, LinX alerts will also be silent. Check your phone settings to avoid missing alerts.

The LinX app shows your glucose reading and changes on the home screen. Just open the app.

Before starting, make sure you have downloaded the LinX app and created an account.

1. Sensor insertion:

• Select an insertion site and clean it with an alcohol wipe.
• Wait 1 minute for the area to dry.
• Open the package and take out the sensor with the applicator.
• Twist off the applicator cap.
• Place the applicator on the cleaned site.
• Press firmly and continue pressing while pressing the button to insert the sensor.
• When you hear a click, the sensor is inserted. Keep pressing for 3 more seconds so the patch adheres.
• Remove the applicator. Smooth down the patch with your finger.

2. Pairing the sensor with the app:

On the home screen, tap “Pair.” The app will detect sensors via Bluetooth and show their codes in a list. Select your sensor’s SN code.

You can find your SN code on the package. If multiple sensors are nearby, you may need to manually enter or scan the QR code next to the SN.

Choose a suitable area on your abdomen or the back of your upper arm. Make sure the site has enough fat and is not in muscle or low-fat areas. Avoid scars, stretch marks, moles, skin irregularities, and insulin injection sites.

The app must be set up before inserting the sensor!

Download the LinX app, open it, and enter the required information. Follow on-screen instructions.

To create an account:

1. Download the LinX app
2. Select “Create account”
3. Enter required information

After registration, connect the app to your LinX sensor and start using CGM.

The LinX CGM system consists of:

• LinX sensor
• Compatible smart device with LinX app

• Avoid heavy physical activity or constant pressure/twisting on the sensor site (even while sleeping) to prevent loosening or damage.
• If wearing the sensor on the arm, be careful drying with a towel and avoid hits or scratches.
• Choose an insertion site with enough fat to avoid muscle placement.
• Showering/swimming is allowed but limited to 60 min and 2 m depth.
• Use an extra patch for better support.
• Do not use in strong magnetic fields. Remove sensor before MRI and don’t bring it into the procedure room.

• On the “Trends” page, select the date range.
• Tap the notebook icon in the top right to generate an Ambulatory Glucose Profile (AGP) report.
• At least 5 consecutive days of sensor data are required for a personalized AGP.

• Tap the account icon on the top corner of the home screen
• Tap “Share/Follow,” then “Add Follower” and enter details (email must be registered in LinX).
• After confirmation, the user can view your glucose data.
• Followers can rename you or stop following anytime.
• Followers can receive alerts about your high/low glucose depending on thresholds you set.

• Do a finger-prick test with a glucometer.
• Open the LinX app and tap “Fingerstick BG” on the bottom bar. Fill in details and tap “Record.”
• Return to home screen. On the glucose curve, you’ll see an icon with the time and reading saved.
• If you’ve used the sensor at least 1 day and readings differ significantly from finger-prick tests, you can manually calibrate when glucose is stable. Tap “Fingerstick BG,” enter details, and confirm with “Calibrate.”
• Calibration requires stable glucose and at least 1 day of sensor use.

If the applicator cannot be removed, stay calm:

• Carefully remove the patch together with the applicator
• Check the site and make sure the sensor fully detached
• Do not reuse the same applicator and sensor

The LinX sensor is waterproof to IP68 standard. Showering and swimming are allowed, but water exposure should not exceed 60 minutes or 2 meters depth.

The LinX app is compatible with Android version 10.0 or newer. On Huawei phones, HarmonyOS2.

To ensure timely delivery of all LinX app alerts and sensor readings, it is important to check your phone settings. The location of settings may vary depending on your device and OS version.

Phone features that may interfere with the LinX app:

• App pause
  If “App pause” mode is enabled, it disables apps. Using this function with the LinX app stops all alerts and sensor readings. This significantly interferes with the app and prevents proper delivery of alerts and readings.

How to exit App pause?

• Press and hold the LinX app icon on the home screen or app drawer
• To change App pause, tap the pause button
• Focus mode
  If Focus mode is enabled, it disables apps. Using Focus mode with the LinX app prevents you from seeing alerts and glucose readings.

How to turn off Focus mode?

• Open phone settings
• Find Digital Wellbeing
• Turn off Focus mode and make sure the LinX app is not listed as distracting
• Battery saver mode
  Battery saver mode disables background data. Alerts may not be delivered on time if this mode is on.

How to turn off Battery saver mode?

• Open phone settings
• Tap Battery
• Turn off Battery saver or select maximum performance
• Do not disturb
  “Do not disturb” mode silences all alerts. To see and hear notifications, don’t use “Do not disturb.”

How to turn off “Do not disturb”?

• Open phone settings
• Turn off the mode restrictions

For the app to function properly, access must be granted to the following features:

• Notifications
  Notifications allow the app to display sensor readings and alerts. Always allow LinX app notifications.

How to enable Notifications?

• Open phone settings
• Find LinX in the app list
• Tap Notifications
• Turn on Notifications
• Battery optimization
  Battery optimization prevents LinX from running in the background if not open. If enabled, alerts may be delayed. Turn it off for LinX.

How to disable Battery optimization?

• Open phone settings
• Find Battery optimization settings
• Follow instructions to disable optimization for LinX
• Background activity restriction
  This prevents LinX from running in the background. If enabled, the app cannot send alerts or sensor readings. Disable background restriction for LinX.

How to disable Background restriction?

• Open phone settings
• Find Background restriction settings
• Follow instructions to disable for LinX
• Location
  Bluetooth requires location to be on. Android requires permission to allow LinX to use location for Bluetooth. If not granted, you won’t receive alerts or readings. LinX does not use this to track your location.

How to enable Location permission?

• Open phone settings
• Make sure location is on
• Find LinX in the app list
• Tap Location permission
• Tap Allow all the time
• Bluetooth
  The LinX app uses Bluetooth to connect to the sensor. To receive alerts and readings, Bluetooth must always be on.

How to enable Bluetooth?

• Open phone settings
• Turn on Bluetooth

The LinX app is compatible with iOS version 14 or newer. To ensure timely delivery of alerts and sensor readings, it’s important to check phone settings. Locations of settings may vary depending on device and OS version.

Phone features that may interfere with LinX:

Screen Time

If you set time limits for the LinX app, it may not open, and alerts or readings may be delayed or blocked.

How to turn off Screen Time?

• Open phone settings and select Screen Time
• Turn off app limits or add LinX to Always Allowed apps

“Do Not Disturb” function

“Do Not Disturb” silences all alerts. To see and hear notifications, don’t use “Do Not Disturb.”

How to turn off “Do Not Disturb”?

• Open phone settings
• Turn off “Do Not Disturb”

Low Power Mode

Low Power Mode may prevent LinX from running in the background if not open, causing delayed alerts or other issues.

How to turn off Low Power Mode?

• Open phone settings
• Tap Battery
• Turn off Low Power Mode

For proper app function, access must be granted to the following features:

Notifications

Notifications allow LinX to display sensor readings and alerts. Allow notifications for LinX.

How to enable Notifications?

• Open phone settings
• Tap LinX
• Tap Notifications
• Turn on alerts

Background App Refresh

If disabled, alerts and readings may be delayed.

How to enable Background App Refresh?

• Open phone settings
• Tap LinX
• Turn on Background App Refresh

Bluetooth

The LinX app uses Bluetooth to connect to the sensor. Apple requires permission for this. Bluetooth permission must be enabled for LinX.

How to enable Bluetooth permission?

• Open phone settings
• Make sure Bluetooth is on
• Tap LinX
• Turn on Bluetooth permission

Wait until the sensor expires, or remove it earlier if you wish. The LinX sensor lasts 15 days. The app notifies you when it’s about to expire and shows the remaining time.

Replacing at expiration:

• The app notifies you.
• Remove the sensor by peeling off the patch.
• Insert a new one and follow the app instructions to pair.

Replacing before expiration:

• Go to Home → Account → “Pairing”
• Follow app instructions to remove the sensor
• Peel it off carefully
• Wait 15 minutes before inserting a new sensor if desired

Sensor removal:

• Gently peel off the patch edges and remove the sensor with the patch.

If your blood glucose level fluctuates significantly or you experience high or low glucose levels that you cannot control on your own, please seek help at a hospital or from a doctor.

If problems occur while using the product or the product does not function properly, please contact your local supplier.

If an error occurs:

• Exit the app completely
• Turn off Bluetooth and then turn it back on.
• After that, re-enter the app.

If the error persists, restart the phone.

No, the LinX sensor does not require charging.

Patients who:

• suffer from alcoholism, drug abuse, and/or severe mental disorders (depression, schizophrenia).
• are unconscious.
• do not understand how to use the product or are unable to learn.
• People with severe hearing or visual impairment.
• Have severe swelling or serious circulatory disorders.
• Are allergic to the sensor patch.
• Are too young or too old to care for themselves independently and have no caregiver.

The reason may be pressure on the sensor during sleep, which can cause the reading to drop.

A sudden spike in the reading may be caused by poor connection. In this case, check that the sensor is firmly attached to the skin.

Problem: Glucose readings are not updated, and the connection fails during saving or calibration. (This error is common on Xiaomi series phones.)

Solution: swipe up 2–3 times to completely exit the app. Turn off Bluetooth, turn Bluetooth back on, and then re-enter the app. If the error persists, restart the phone.

• The message “Sensor error” appears a few days after sensor installation. The usual reasons are a poor installation site (little fatty tissue) or incorrect insertion. The error message may also be caused by damage to the sensor (for example, from an impact).
• If the error message appears later in the usage period, the usual reasons are reduced adhesion of the patch or the sensor being scratched, which causes the sensor’s contact with the body to loosen.

1. The graph does not appear after the warm-up period ends, and the message “Sensor is stabilizing” is displayed.

• The reason may be subcutaneous bleeding, which affects the data. Please wait patiently for the graph to appear; it will not take longer than 4 hours.

2. The application displays “Sensor stabilization” during use.

• Please wait patiently for the data to be displayed; usually, it does not take long, after which you should follow the further instructions shown in the app.

In general, a notification is displayed: “Replace sensor.”

Possible reasons:

• The selected installation area is not suitable.
• When installing on the abdomen, avoid the midline, scars, belt area, stretch marks, and insulin injection sites
• It is recommended to place the sensor at least 5 cm away from the navel.
• When installing the sensor on the arm, insert it into the back of the upper arm where there is more fatty tissue. Do not insert the sensor into the muscles located on the outer side of the arm.
• Incorrect sensor insertion
• The applicator must be pressed firmly against the skin, and the abdomen should be pushed out during sensor insertion. Do not suck in the stomach or bend over during installation (be careful not to lean forward when looking down).
• When positioning the sensor, keep your finger ready on the button to press for insertion. Avoid leaving a large gap between your finger and the applicator button during placement.
• Transport
• Sometimes the sensor may be damaged during transport, and the needle may not be positioned in the center of the sensor.

• The app checks insertion success within 4 hours of confirming new sensor placement. If insertion fails, the app shows “Replace sensor” with notification. If not inserted correctly, remove and replace with new.
• After 4 hours, if insertion was incorrect, the app shows “Sensor error, waiting for stabilization.”
• If sensor has been used at least 4 hours and shows more than 4 “Sensor error” notifications within 2 hours, you’ll see “Replace sensor.”

Make sure Bluetooth and Location are always on. Two possible errors:

• Serial number entered incorrectly → enter it correctly or scan the QR code.
• Serial number already in use → contact customer support.