Seems sketchy
The app shows a wrapper for (what appears to be) the Tesla login page. But there’s no way to see the URL to confirm if you’re on Tesla.com or some random site replicating the page. Not putting my password in. Deleting.
Response from developer
Thanks for the feedback — your concern was completely valid. The latest version now clearly displays the current URL during sign-in, so you can verify that you’re on Tesla’s official website before entering your credentials. We hope you’ll give Teslyr Connect another try.