Floodtide checks Mac apps through their own Sparkle feeds and Homebrew, then safely updates the supported apps you choose. £19.99 once for three Macs, with no background coverage reporting unless you enable it.
I built this because MacUpdater shut down on me and nothing replaced it properly.
The reason MacUpdater died is that it maintained a hand-fed database of every
Mac app's versions, and that is unsustainable for one small team. Floodtide does
it the other way round: it reads each app's own update source directly, either
its Sparkle feed or the Homebrew cask catalogue. Nothing to maintain, so nothing
to go stale.
It also tells you honestly which apps it cannot handle instead of pretending.
£19.99 one time, 14 day full trial, covers 3 Macs. No telemetry unless you
switch it on. Happy to answer anything about coverage, including where it falls
short.