Hey Ali!

On a Free plan, you can use core Adapty features for free if your app revenue is less than $10k/month. If your app is over $10k or if you want Pro features before reaching $10k/month, you have to update to the Pro plan. It has a fix of $99/month and charges $7.99 for every $1k app revenue over $10k in a monthly period.

For example, if you're $15k/month on a Pro plan, the cost will be $99 + 7.99 * (15-10) = $139.