I have opened a thread with Garmin Customer Care in June 2016 :
Subject: App Security
Description: Hello and thank you for your support. I would like to know whether Garmin does any apps validation for security breaches for the apps uploaded to Garmin Connect IQ store. Here is the article talking about security issues : http://www.makeuseof.com/tag/fitness-tracker-putting-security-risk/
After multiple follow ups Garmin did not provide any answer and I have shared my concerns with other Garmin users. This is unacceptable practice that such a reputable company with good products does not take security seriously especially after being alerted by consumers and industry reports.