I said personal point.
Plus here's a quote from their policy too.
"...attempt to access or search the Services or Content, or download Content from the Services through the use of any technology or means other than those provided by Niantic or other generally available third-party web browsers (including, without limitation, automation software, bots, spiders, crawlers, data-mining tools, or hacks, tools, agents, engines, or devices of any kind)...."
And one more quote to sum up my point..
"The good news is, some mapping tools like the mega-popular Pokevision, which works with a web browser, or PokeNotify, an app for Android, don't require you to use any login. So they won't know it's you."