--- title: What is Personal Prime description: HackMD Prime is the first-class, value-added flavor of HackMD. image: https://hackmd.io/_uploads/BJv9IQyXY.png --- <style> .hmd-primer-logo { background-image: url(https://hackmd.io/_uploads/HkrpIo3MK.png); background-size: cover; width: 1em; height: 1em; min-height: 18px; display: inline-block; } </style> # What is Personal Prime :::success [Try HackMD Prime Personal, first month is on us](https://hackmd.io/@hackmd-marketing/Prime_Personal_english) ::: [TOC] You are already familiar with the "prime" symbol ($'$) as in $A'$, because it's everywhere in algorithm and mathematics, on which are the bricks the core technologies of HackMD builds. <span class="hmd-primer-logo"></span> **HackMD Prime** is the first-class, value-added flavor of HackMD. ![](https://hackmd.io/_uploads/ByZv4Xymt.png) ## I don't have an account :point_right: Click [here](https://hackmd.io/join) to register for free, start your HackMD. ## I've already had an account :point_right: - Overview: You can find the magic wand "Upgrade to HackMD Prime " on the left. ![](https://hackmd.io/_uploads/BJv9IQyXY.png) - You can view all plans in "Billing" page. ![](https://hackmd.io/_uploads/Sk58oQy7t.png) # How to check invoices or change plan - You can also adjust all plans in "Billing" page. ![](https://hackmd.io/_uploads/rySEi71XY.png)