Windows Insider app, the only gateway to Windows 10 Mobile Technical Preview as of now to any Windows Phone user has got an update for all those who are on Windows 10 Mobile and not for users who are on Windows Phone 8.1.
There is no change log mentioned by Microsoft regarding what the update brings in to the app. The version of the app in Windows 10 Mobile, however, has changed to 18.104.22.168. Along with the bug fixes and the usual improvements, the app now gives an option for the user to opt out of the Windows Insider Program. When tapped on the more icon (the three dots on the bottom right) on the home page of the app, there is an option that says “leave program” directly from within the app.
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