1
Identify the access type
Look for an explicit distinction between an ongoing free tier and a time-limited trial. Check whether the stated limits apply to connected channels, queued posts, or both. If the terms are unclear, do not build a full calendar around that post scheduler yet.
2
Test the publishing path
Create a draft, select a destination, and set a future time. Then check whether the post scheduler says it will publish automatically or send you a reminder to finish the post yourself. A saved draft is useful, but it is not proof that publishing is covered.
3
Plan for a change of plans
Try editing the caption, moving the time, and removing a queued item before relying on the calendar. Note where you would confirm that a post actually went live. A workable post scheduler should make those routine checks understandable, even if some actions remain manual.