I have developed three apps for Garmin wearables.
You can find them in the Connect IQ Store. Most watches are supported, drop me a line if you'd like me to add your device.
DWatch records activities and reports current sensor information on your activity. You can configure the application to meet your needs.
MyBattery keeps tabs on your current charge state.Configurable multi-sport app
Configurable large font watchface
Keep tabs on your watch battery usage