While I am far removed from USA politics (and politics in general), this does seem like a nifty tool that promises to have a real-life impact on legislators (depending, of course, on adoption). Considering the deluge of apps/tools to email or tweet legislators, it is a welcome relief that someone did spend the time to create this. In case you missed it (like I did), here is a link to the TechCrunch feature [1]. In spite of the creators' explicit politics, I think the effort in itself (and the motive to make governing more two-wayish) is commendable.
1- 5 Calls debuts what may be the easiest way to call your reps yet [https://techcrunch.com/2017/01/25/5-calls-debuts-what-may-be...]