Markets are pretty efficient and save for that rare exceptional stock theme, ETFs are usually your best move. (etfbase.com)
Action Launcher's companion app, AdaptivePack has long been the best way to get the most out of adaptive icons, both bringing full adaptive icon support to devices not yet running Oreo and providing Oreo users stock themed adaptive icons for apps that don't currently offer them natively. (blog.actionlauncher.com)
The app also offers Oreo users stock themed adaptive icons for apps that do not natively offer them yet. (androidauthority.com)