subscription option for pro features :
If you choose to subscribe, app offer auto-renewable Premium Subscription options
weekly subscription with $5.99 per week auto-renewal
yearly subscription with $17.99 per year auto-renewal
Life time Purchase with $19.99 One time Purchase (NO Renewal)
Payment will be charged to iTunes Account at confirmation of purchase
Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable