Ah cool. I've mostly been learning about them from reviews as they come in my Ars Technica feed. Here's the most recent four, all of which include an app, so I thought it was common. Perhaps that's just a factor of shiny new things that get sent out for review, versus old-reliable models that no one covers.

> If you want anything more than that, you'll have to use Specialized's Mission Control phone app, which pairs with the bike via Bluetooth. Once again, I had trouble pairing my phone with the bike

https://arstechnica.com/cars/2023/06/into-the-rivers-and-thr...

> Tenways also provides an app, which can track rides and offers some other limited functionality

https://arstechnica.com/cars/2023/06/silent-stiff-and-svelte...

> Before my first ride, I paired the bike with the Trek Central app, which is available for iOS and Android. My first attempt failed, as the app had yet to be updated with the specs

https://arstechnica.com/cars/2023/05/it-feels-like-cheating-...

> Learning anything about the bike requires the use of a phone app, which is where I had my biggest problems during my testing

https://arstechnica.com/cars/2023/05/gocycle-offers-a-superb...