

If they’re operating in the US, it doesn’t matter whether the app is intentionally pulling unnecessary information, there are still server logs showing the IP of each request being made for the real-time updates (ISPs also will have logs of the connections, even if they can’t see the SSL traffic directly). That IP + timestamp would let the government know (with the help of your ISP, who we know from the NSA leaks are all sharing info without asking for warrants) exactly who you are.
If you are routing all your traffic through a VPN, you can make that much harder to correlate, but unless you validate on the wire or in the code that the app isn’t sending e.g. a device ID or any other kind of unique identifier, it could still end up compromising you. A webpage just intrinsically doesn’t carry the same level of risk as a local app.
That’s why, as the article notes, many of these have been shutting down preemptively; they know they could be putting their users at risk.
Technology isn’t inherently bad, obviously, but in our current world it’s primarily owned, controlled, and advanced by bad groups and people (for-profit companies, governments, and the rich). Until we actually extricate ourselves from this situation, we should be very wary of looking to technology for cures to out problems.