SunMonitor AppWidget for Android puts automatically updating solar activity data on your home screen. Choose from different images and graphs, to keep track of the sun.

From your home screen, add as many widgets as you like. Each widget can be resized independently.
Widgets update automatically, graphs every 3 hours, images every 6 hours.
Widgets available: SWX composite, LASCO coronagraph, ACE solar wind, Magnetogram, AIA193, AIA304, Helio360* and Visible Light.

Update 2022-07-18: Helio360 image no longer updating. Other images update as expected.
An update is required to fix this issue. Because of changes to app requirements, updating this widget requires a lot of unrelated code changes. Because it is such a niche app, maintenance of this app is indefinitely paused. Users may continue using the remaining widget images as intended.

App information page:
https://kodintent.wordpress.com/sun-monitor/sunmonitor-android-appwidget/