Setapp offers three subscription plans:
- Monthly, which costs $9.99 per month (+ VAT),
- Annual, which costs $107.88 per year (+ VAT), and
- Educational, which costs $59.88 per year (+ VAT).
The price is fixed and it doesn’t change over time. Also, there are no additional charges.
The first month is free for all subscription plans (note that you don't get another free trial month if you change your plan).
More information about charges and prices is available here.