Everything you need to get the most from your sensor

Quick Start - Before First Use

We recommend reviewing the Quick Guide before applying your sensor for the first time.

Download Quick Guide here.
  1. Install the Mobile App
    Download the Syai companion app from your phone's app store.
  2. Apply the Sensor
    Apply the sensor to the back of your upper arm, following the included instructions.
  3. Pair Your Sensor
    Open the app, enable Bluetooth, and follow the on-screen steps to connect and start tracking.
  4. Important (for non-diabetic users)
    The default range is set for diabetes (3.9–10.0 mmol/L).
    For general health, adjust to 3.9–7.8 mmol/L.

    Watch this video:     Getting started with the Syai Ultra CGM, for a full walkthrough.

Before You Buy – Important Information

Sensor Requirements

  • Each sensor is designed for single use
  • Intended wear period is up to 14-days
  • Requires a compatible smartphone with Bluetooth enabled
  • Internet connection required for full app functionality

Phone Compatibility
The Syai app is compatible with most modern iOS and Android devices. View Compatibility List here

Tip: For best performance, ensure your phone’s software is up to date.

Instructions For Use (IFU) document
Click here to download this.

After Applying Your Sensor — Important Care

First 24 Hours

  • Keep the sensor area clean and dry immediately after application
  • Avoid pressing or knocking the sensor unnecessarily
  • Allow the adhesive to fully settle on the skin
  • Be aware that glucose sensors take up to 24 hours to settle (marinate!) and can initially look a little different from capillary blood glucose readings. This is normal. Do not be alarmed. The glucose sensor readings will settle down after the first few hours. 

Minor awareness of the sensor is normal when first applied.

Getting Accurate Readings

  • Keep Bluetooth enabled on your phone
  • Keep your phone reasonably close during initial connection
  • Follow any calibration or setup prompts shown in the app

If readings appear unexpected, allow some time for the sensor to stabilise after first activation.

Daily Wear Tips

  • Normal walking, working and exercise are fine
  • Showering is fine under normal conditions
  • Avoid excessive rubbing directly on the sensor
  • Avoid placing tight straps or clothing directly over the device

Adhesion Advice

  • Apply only to clean, dry skin
  • Avoid moisturiser or oils before application
  • Press firmly during initial attachment

If edges begin lifting, avoid pulling or adjusting the sensor unnecessarily.

When to Contact Support

  • The sensor detaches completely
  • The device will not connect after repeated attempts
  • The app cannot detect the sensor

Include your order number and a short description of the issue so assistance can be provided.

Get in Touch

Please complete this form and we will get back to you as soon as possible. Alternatively, email support@glucoseevolution.co.uk