Apple Passwords has no pricing page. That is the entire price record: Apple ships the app with the operating system, syncs it through iCloud Keychain, and does not sell an upgrade. The user guide describes finding “the password credentials for all your websites and apps, in one place, across all your devices”, and nowhere in it is a number.
For this desk that makes it a rare entry. There is no first-term rate, no renewal, no seat count, no family tier and nothing to cancel. The annual bill is $0.00 and it stays $0.00.
The cost, such as it is, is not a monetary one: the thing lives inside one company’s operating systems, so its value to you depends on whether everyone whose passwords you care about is already there. That is a household question rather than a billing one, and it is the only reason anyone in an all-Apple house would pay $19.80 or $47.88 for something else.