John, SUMO should be deleted from the app store.
They abandoned it several months ago and shut down their servers so it no longer runs.
Likewise for DUMO.
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They're both specifically listed as (Discontinued) in the App Store, will not show unless a user chooses to show "Advanced Apps" and will show the following alert on every launch:
THIS APPLICATION HAS REACHED ITS END-OF-LIFE - KC Softwares, the publisher of this application, has shut down as of October 31st 2023. The servers DUMo uses to function are no longer online and it will no longer be able to detect updates.
Some folks may wish to use them to index their local software or drivers, so they can be of some use in that case.
Sometimes, the impossible can become possible, if you're awesome!