What they worry about can be listed as below:
Moreover, the Norwegian Consumer Council (NCC) has analyzed four smart watches for children. These devices were all bought in Norwegian stores and are called Gator 2, Tinitell, Viksfjord (which uses Setracker), and Xplora.
Setracker has more than 4,200,000 total downloads around the world. The Wonlex device is one of the Setracker users; there is something we need to clarify.
Setracker has passed the application security measurement of Alibaba Security Team, with an encrypted interface and strong network firewall, and data backup every day. With technical support to prevent DDOS attacks, blocking password cracking, SQL injection, XSS cross-site, and other hacker attacks. Setracker uses the HTTPS certificate of Symantec. (Symantec is the world's fourth largest independent software company; the top three are Microsoft, Oracle, and SAP, but also the world’s largest information security vendors and service providers.) Data transmission will not be attacked.
-Absolutely NO!
The original password of each device to check the watch parameter is "123456”. After the user gets the device, you can use your cell phone to send the text:”pw,123456,pw,******#” to the watch number by SMS(*means the new password). After that, the new text to check the parameter is: "pw,******, ts#”. Moreover, when you want to change the center number, the SOS number, or monitor the watch, you need to insert the password in the text. Also, Setracker requires the user login account to access; without a password to log in, hackers can not get any information on the server and track the user. The server has anti-attack and anti-password crack functions; hackers do not know the user's account, but also can not get the password and track the watch. By these two ways, hackers no longer know the watch parameters: IMEI, ID, register code, and cannot monitor the watch anymore; it's absolutely safe!
-Absolutely YES!
Setracker is a huge information processing system with protective hacking. Setracker has never been attacked or exposed the location information, and it will never happen in the future. We can only access the user account when we have permission; we can promise you that at least the Setracker server is safe, and the account information is encrypted.
-Absolutely NO!
Each ID is unique; it can only be registered once. The second registration will show as: "Device number already registered, please contact your agent to restore!” Why user say the ID can be registered twice? Because there is Setracker 2, the user found that an ID can be registered in Setracker 2 after registering on Setracker. We have fixed this bug; please rest assured.
In the article on the NNC, some points need to be corrected.

For term 3, the personal data will never be used for marketing purposes and will not happen in the future; we promise this.
For terms 4, 5, and 6, no button can delete the data and account by the user, only by the wonlex team. The APP only supports checking 90 days of location info; beyond the setting time, location info is auto-mopped.

For item 6, if the user is out of the GEO fence, the battery is lower than 20%, SOS calling, and the watch is removed, the APP will receive the alert message. Need to turn on this function in the Settings-push switch. Moreover, when SOS calling the watch removed will have message notification on your phone.
Setracker is a safe and feature-rich APP. About the security problems pointed out in the report, even a simple application without these problems. As one of the most reliable applications, Setracker has been downloaded over 10,000,000 times, never with these problems as well. When Setracker launch, it always being attacked by the similar application company on purpose, even in 2015, the most popular period of GPS tracking watch in China, have the same questions being pointed out on purpose, user who don't understand the APP clearly will be misguided by the report, Setracker technical team continuously enhance security of the application, the tens of millions of users in the China and abroad is the best proof.
Here is the China domestic version application "security guard" in Tencent user store download statistics.
Setracker is a safe and feature-rich APP.