You can always connect to Stryd with a Bluetooth device such as a phone or Suunto/Polar watch regardless of whether Stryd is activated (this is different for Garmin watches). When you are using an Android phone, you might be prompted to activate your Stryd. This message is misleading as there is no need to activate Stryd.
If you are trying to offline sync your Stryd, record a run, etc. and you get the Activate your Stryd message for more than a few seconds, perform the following actions:
1. Force quit the Stryd app on the phone
2. Open up the Bluetooth settings of the phone.
3. Disable Bluetooth and reenable it.
4. Open up the Stryd app and retry the same action.
If you need further assistance, contact firstname.lastname@example.org.