No, the number of records is unlimited at full version of Passwd. Free Tier is limited to 50 records due to security reasons. We strongly recommend to use full version.
Any. You can use Passwd for storing logins, codes, bank credentials, and other types of strings.
You can group records using tags. It is up to you what categories you choose to use!
Yes. You can share records via unique encrypted link for 24 hours. You can extend this time if you need to. To see more about this feature see blog.