You’re right, there are a lot of communication and subscription options. WhatsApp is the current tool of choice for organisers, but there are a few issues, mainly because it’s developed for a very large variety of uses, so it can’t be specialised.
The main thing we’re interested in doing is building something that is marginally more useful than WhatsApp, (which can mostly be done by adding anonymity options) and then iterating from there. You’re right that there are lots of software options, but there isn’t any union-specific software that is actively going through the dev->users->dev feedback loop. The features I’m excited about are the ones we haven’t decided to add yet, e.g. integrated scripts for talking to fellow workers, public mapping for flying pickets, temporary action groups that expire after a certain time period or goal is achieved, invitation trees where you can see who invited who to check how your group might have been infiltrated etc.
Now, you’re right, obviously an app is not going to provide a solution to every problem that unions have, but they can take out the drudgery of an organiser thinking “which communication software should I use? which funding option should I pick?”. And then they can use the energy that they would have used to make those pointless choices, into the stuff they actually want to do, like making personal connections to people in the workplace, putting on fundraisers, training other organisers etc.
I’m happy for people to continue adding constructive criticism, I’ve been adding people’s ideas and problems to the project for the past year, and it’s made it what it is.