Heliosphere only collects information that you provide. Such information is kept indefinitely or until you delete your account.
Heliosphere never shares user information with advertising agencies or data brokers. The only case in which Heliosphere would share your information with a third-party is to provide you with a service. For example, Heliosphere may share your email address with Stripe during subscription creation in order to let you create a subscription and stay apprised of its status.
Heliosphere keeps visitor IP addresses temporarily in order to rate limit certain actions. IP addresses are not linked to accounts or identities.