Most Desktop tools have the advantage of allowing you to track an unlimited number of keywords.
Rank Tracker (PC, Mac, Linux)
Rank Tracker is a desktop program that is available for all major operating systems, including Windows, OS X, and Linux.
Rank Tracker will keep track of your rankings in over 400 search engines, even in foreign markets, and without any limitations whatsoever. There is no extra cost for more search engines or more keywords. It can even be set to do this on autopilot at whatever frequency you choose.
Not only will it check your ranks, it will also help you research keywords, build and manage links, research your backlinks and competition, audit your website content, and even manage your social media.
There’s a 7-day trial, but the software itself starts at $299 for the Professional version, which is fine for most website owners. It’s pricey, but it can save you money over the long run when you factor in many months of service from an online service that has a monthly fee.
EZ Rank Tracker (PC)
EZ Rank Tracker is for PC only, comes with a wide range of features, and is one of the most affordable solutions out there. You can track your rank in 188 Google domains and have an unlimited number of projects and keywords, as well as track social signals and website stats and more.
Pricing is $19.99 per month or $99.99 for lifetime.