Keypad Home (MQ Co.,Ltd) collects no data and shares no data. It has no ads, no analytics, no accounts and no servers.
The list of installed apps, your usage counts (used only to rank results), shortcuts, codes, notes and settings are stored locally on your device. Contacts are read only if you turn on contact results; matching happens in memory and nothing is stored or sent. You can delete everything by clearing the app's storage or uninstalling.
QUERY_ALL_PACKAGES: needed to list the apps you can launch (core purpose of a launcher). READ_CONTACTS: optional, for call/message results. SET_ALARM: lets the "alarm" command open your clock app. The app uses no Accessibility service, no notification access, no overlay and no location.
Purchases are handled by Google Play. We never see your payment details.
Questions: contact the developer through the Google Play listing.