Neal's Weather is free, it has been for some time now. You cannot purchase it because the subscription model is not being used anymore.
However, all old platforms, like Desktop, Windows Phone and Windows Store, are not being supported, only the web version is in use. If you want to continue using Neal's Weather you will need to switch to the web version.
The Desktop, Windows Phone and Windows Store versions are obsolete and unsupported, the last build of those platforms was 8/23/2015.

Neal's Weather Accounts

Expired: Saturday, December 17, 2022
Expired: Saturday, December 24, 2022
Expires: Saturday, January 1, 2050
This account expiration is an attempt to migrate those existing users to the current web version to gain access to updated features and capabilities, like daily forecasts and global weather providers. This also attempts to mitigate possible data security issues presented by the Desktop version.
If your account shows that it has expired, then perform the following steps to get an account setup on the web version, free of charge.
  • Go to Neal's Weather website and select the "register as a new user" link.
  • Enter an email and setup a password when prompted. You will be added as a new user, but logged out and will have to sign back in after using the confirmation email it will send you.
  • Wait for the confirmation letter to arrive in your email Inbox (make sure to check your Spam or Junk folders as well).
    • If you try and sign in without confirming the email, you will be denied access, with "Email not confirmed yet" message.
  • Follow the links provided for the email confirmation.
  • After completing the email confirmation, you will be able to log in and use Neal's Weather'.

If you really, really, really need to use an older, unsupported, platform version, please contact me with your reason and I will consider reinstating it for a short time. You must be very persuasive in order for this to happen.