Is it possible to customize the available search engines? I'm a Kagi user and would like to be able pipe searches to that even if they were just text
F-Droid
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
IzzyOnDroid is an F-Droid style repository for Android apps, provided by IzzyOnDroid. Applications in this repository are official binaries built by the original application developers, taken from their resp. repositories (mostly Github).
Google's forced cloud syncing in Circle to Search is enough to make people ditch it on the spot. Multiple search engines is the right call because vendor lock in ruins tools like this fast. Does the app send the cropped image off device for any engines, or can you keep the whole flow local?
Google's forced cloud syncing in Circle to Search is precisely the kind of thing that makes privacy-conscious users reach for alternatives the moment they notice it. Having multiple search engines available out of the box is the correct move instead of locking you into Google. Does the app handle image search results locally before sending anything upstream?

