I've been on the lookout for a good rank tracker and this one certainly fits the bill.

Pros:
- Good UI. The interface is nice and clean, resembling Ahrefs in some places.
- Sharing Link. The sharing link is a real winner for anyone who works with clients, I like that it gives all the same functionality as when you're logged in just without the navigation sidebar. This makes it super easy to direct clients around the interface, knowing you are both looking at the same thing.
- SERP Features. Ranktracker really excels in this department, it's great that the Competitors tab shows you all of the SERP features for each keyword +plus those owned by your domain and competitors all in one view.

Cons:
- Tagging. Tagging needs a bit of an update but hopefully these are simple fixes that can be implemented soon. There is no bulk checkbox on the Overview tab to select all your keywords... nothing worse than adding 1,000 keywords only to realise you need to select them one by one to apply tags!! Also the custom color when adding a new tag doesn't seem to work, it either doesn't add or it stays blue.
- FAQ SERP Features. This would be a great feature if it worked as most rank trackers I've tested don't track FAQ snippets but it always shows zero even for keywords where I can see the FAQ snippets in the SERP preview provided directly by Ranktracker.
- Higher Limits. As others have already mentioned, being able to track weekly instead of daily and having higher tiers right here on AppSumo is really needed. 1,000 keyword checks is really 500 if you want to track on desktop and mobile, which I would guess most users would.

Overall, Ranktracker is right up there with some of the best IMO. With a bit of fine-tuning and higher limits I can see this being my go-to for tracking SEO client rankings.