The Post History feature allows you to see your past posts for up to 12 months back.
You will have a record of the posts made through Postcron shown in chronological order. You will also have the option of viewing the posts for all the social accounts you select at once, and with a search engine for keywords that will show you more specific results.
So, in addition to being in control of your posting activity, you can reschedule previous posts or re-use them as a base for creating new content!
If you're on the Free version you'll be able to review your past posts up to 24hs. If you're on the Personal plan, you can review past posts from the last 10 days. While with higher plans, starting from the Entrepreneur, you'll be able to review your past posts up to 12 months back.