Pokemon Go

Ahead of Pokémon Go’s big February update, which added 80 new monsters, Niantic and the Pokémon Company did a big sweep of third-party Pokémon trackers. Very few mobile apps are still live. And in case you’re still unsatisfied with Pokémon Go’s in-game tracker, we’ve compiled them for you.
Waves of cease-and-desist letters brought down over a dozen third-party trackers since the mobile game’s explosive July, 2016 release. There’s a reason why so many popped up in the first place: Pokémon Go’s native tracker was widely considered garbage. Until recently, the game’s “Nearby” or “Sightings” features didn’t work, barely worked or weren’t accessible to everybody. Late last year, Niantic introduced a new PokeStop-based tracker that fans have come around to.
Players who’d prefer a more targeted tracking option must look elsewhere, though. Third-party apps cut out the wandering and exploring that Pokémon Go’s tracker encourages by directing players to specific locations for specific Pokemon.
Around January 20th, widely-used tracking apps like Pokemap finally folded. On Pokemap’s website, the team explained that the Pokémon Company went after them for their copyrighted images of Pokémon and unauthorized access to Niantic’s servers. Its creator told me that the Pokemap team thinks that Pokemon Go’s January server issues contributed to the ban wave.
“With the server issues, Niantic would have wanted to decrease the server loads as much as possible to try and get them to be stable again. That would have caused them to go after people who are accessing the servers without using Pokémon Go, so 3rd party apps like Pokemap etc.,” he said.
The remaining working tracker apps generally steer clear of obvious Pokémon IP. There are only about two for Android and three for iOS, plus several web-based ones. Here’s what’s left.

For mobile:

PokiiMap (Android)

Not entirely user-friendly, but quite effective. It describes itself as “PokeVision on Android.” You’ll receive notifications for selected “pokemons” in your vicinity, which the donation-based app scans every two minutes. Thankfully, it tells you when Pokémon disappear, so you won’t be going on too many child goose chases.

PokeSensor (Android and iOS)

An accurate, but again, hard-to-parse app for scans up to 1.25 miles. It’s free and highly-rated, but doesn’t show users when Pokémon un-spawn or images of Pokémon.

PokeTracker (iOS)

PokeTracker has Pokémon filters and lets you hide Pokémon you’ve already caught. Users receive notifications for desired Pokémon and can see gyms and PokeStops. Its pro version is $2.99.

PokeWhere (iOS)

PokeWhere has helpful pictures of tracked Pokémon plus a count-down to de-spawns. Its pro version is $4.49 and it’s not as highly-rated as other apps. It doesn’t require an account to use, so your main account can stay safe from Niantic’s ban hammer.

On Web for U.S. or global:

PokeHunter.co

You can scan any location on PokeHunter. It’s pretty fast, with only a few seconds delay, and precise, too. Sometimes, it requires a few tries.

PokeSear.ch

It’s often down, but an accurate and easy-to-use tracker that lets you scan any location.
Alongside web-based global trackers are a slew of location-specific ones serving anywhere from Christchurch, New Zealand to Windsor, California. This helpful list on Reddit encompasses most of them.
When using trackers that draw from Pokémon Go accounts, remember to make a new account. By using your primary one, you’re risking all that hard work you put in cannibalizing Pidgeys for each other.