Price: one plan on each side
Peekly's pricing page describes a single plan with full access and no credits to watch. It lists $29 monthly, $72 per quarter and $240 per year, and the yearly card reads $20 per month billed yearly. It says you can cancel in one click.
AppHitlist is also one paid plan with everything in it, monthly or yearly, cancel anytime from the account page. So the price gap is not about tiers. It is about scope: Peekly pays for two stores and extras like paywalls, AppHitlist for one store.