You'll be charged on your renewal date, which is listed in your Mixbook account in the app or directly in your Apple Account.
To find your renewal date:
Mixbook app:
- Log into your Mixbook account in the app
- Tap the profile icon in the top-right corner of your screen
- Find “Mixbook+” — your renewal date will be listed there
Apple Account:
- Log into your Apple account (used to purchase your Mixbook+subscription)
- Go to settings
- Click on your "Apple Account" > "Subscriptions"
- Find "Mixbook+" and find your "Renews on" date