Subscribe or invite friends to earn free credits

Pop down the top left corner of toolbar, you can earn credits by subscribing or inviting friends.

Subscribe

Earn $2.1 credits when subscribing with invitation code:

Total 84 free requests
Chat total 28 free PDFs
Chat at most 5 PDFs for one conversation
7 days free trial

Earn $1.5 credits when subscribing without invitation code:

Total 60 free requests
Chat total 20 free PDFs
Chat at most 5 PDFs for one conversation
5 days free trial

Invite friends

Earn $1.5 credits when inviting a friend to subscribe with your invitation code.

Earn more credits. Once a new friend invited to subscribe with your invitation code, your credits will be increased by $1.5.

Each $1.5 has the following usage rights:
Total 60 free requests
Chat total 20 free PDFs
Chat at most 5 PDFs for one conversation
5 days free trial

Recommand you directly generate invitation code, you will get $2.1 free credits, even if none friends are invited to subscribe now.
When you subscribe or generate invitation code successfully, the information of subscription or invitation will be shown as the figure below: