It's the one I use the most, but in my experience it's lagging behind the Twitter accounts. It's also noisy because it puts last-minute outages at the same level as minor month-long schedule change (which can't be dismissed), so some lines (eg. line R) are almost always displayed as having issues.
replyThis app is just garbage. Can't even use it if you are rooted.
replyFor me a website is much more accessible than a phone app in many situations.
replyOk but can you answer my question about reliability?
replyI don't have a horse in this race but I would question the idea that a municipal service has a better reliability record than x/twitter.
replyBut who is publishing the outage information to X/Twitter if not the utility itself? I'd be surprised if they do that more timely and reliably on a third-party platform than their own app. That's not the case for any European or US transit authorities I know.
replyCan any other user of public transport in Paris comment?
The information may be as reliable, but:
reply1. the service may not be - every small provider has downtime, perhaps proportionally to their size.
2. the tools to update Twitter are well understood, and you can get software that does scheduling of posts across multiple platforms, previews of what posts will look like, etc etc, and said preview works well on the many platforms that people are already using. People doing the updating may prefer to use those tools over what the internal tool gives them.