Seems to have a compatibility issue with Android 6 and higher. Stucks there with connecting to the cloud probably on BLE stack. With Android lower than 6 I didn't have any issues and it was pretty fast and easy to claim a device.
This app keeps crashing on my galaxy s8 plus. My bluz device is currently unusable
Won't connect Bluz DK to the cloud. It just blinks blue quickly for a few minutes then changes back to blinking blue slowly. Running Android 7.0 on Samsung S6.
Crashes often Selecting your connected device crashes the app. The app should provide feedback on claiming process or led modes. Icons for device are generic. Looking forward to improvements. Needs auto reconnect.
Fix critical issue where devices wouldn't connect to Particle cloud
Scan and discover your Bluetooth low energy devices with nRF Connect for Mobile.
Bluetooth Low Energy(4.0) Scanner: Read,Write,Notify, Services & Characteristics
pfod - Control micro-devices from your Andriod. No Android programming required.