To cancel all the future charges, you may unsubscribe from our services. Please follow the guides below: https://support.apple.com/en-us/HT202039#subscriptions
Open your iPhone Settings.
Tap your name.
Tap Subscriptions.
Tap the Tofu Expense icon.
Tap Cancel Subscription. If you don’t see Cancel Subscription, the subscription is already canceled and won't renew.
Important: Simply deleting Tofu Expense from your device won't cancel your subscription.