A lot of free follower tools only work on one type of Facebook account, usually pages, which leaves personal profiles out entirely. This one covers both. If you are growing a business page or building out a personal profile, the same form and the same limits apply either way.
The only real condition is visibility. Facebook needs to actually let outside traffic reach the profile or page, which means it has to be set to public. If your profile is currently locked down to friends only, that setting will need to change before a claim can go through.