Attendance Manager is free to download and use.  Premium update allows using reports and extends app functionality. 

Attendance Manager Premium Subscription:

1-month subscription – $3.99 (automatically renewed until canceled)
1-year subscription – $34.99 (automatically renewed until canceled)

Trial period is available. You can cancel it any time.

Subscription will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless cancelled at least 24 hours before the end of the current period. You will not be able to cancel a subscription during the active period. You can manage your subscriptions in the Account settings after purchase.