We do not offer any system that allows for stacking of plans or anything of the sort. Perhaps we could suggest an alternative:

1. Purchase in-app credits based on the amount of usage you expect (Recommended).

-> You can view our pricing page here: https://writerzen.net/pricing

2. Purchase separate accounts under separate usernames to receive double the credits on a single plan. 

- For further support, please contact our team at support@writerzen.net.