If you are signed up to get preview builds for Windows 10 Mobile on the Windows Insider program, you should soon see a return of the Insider Hub app.
The return was promised by Windows Insider head Gabriel Aul in a Twitter post:
" It will be available in the next preview build from the Development Branch."
The Insider Hub has been available for Windows 10 PC and tablet users on the Insider Program for some time, but the app for Windows 10 Mobile has not been available for a number of months. It's return means that Windows Insiders will be able to get news and more information about current and upcoming preview builds of Windows 10 Mobile from their smartphone, along with offering direct feedback to the development team.
Source: Gabriel Aul (Twitter)