Hue does support Matter. Hue is expensive but delivers a premium experience, unlike the products talked about in this thread that are expensive but not better than the competition.
That can work for two apps but it's tedious once there are three or more. You'd also need to swipe back and forth between apps to find the corresponding prices for each ride type (Wait & Save, Standard, Comfort, etc.), whereas this app groups together the prices for each ride type across providers.
That's a valid concern but I think it's unlikely. No one's account has been locked for using this app. Rideshare companies take a large cut of the ride fare, so locking user accounts for using third-party apps is against their incentives. It's more likely that they would try to prevent this app from working, rather than targeting users of the app.
Not a ban, perhaps... but if I have two users - Alice who uses the app according to normal patterns, and Bob who consistently predicts and declines when my dynamic pricing algorithm tries to push above market pricing, and has a remarkably high look-to-book ratio - I'll want Alice to have better drivers, better service, faster pickups etc., because I'll have larger lifetime margins from choose-the-app-on-vibes-Alice than from race-to-the-bottom-Bob.
If my known-good supply is limited at any given time, I have every incentive to focus it on Alice, and I'd be inclined to try out e.g. new drivers on accounts like Bob's.
Rideshare data teams are incredibly talented, capable, and motivated. One does not simply front-run a market where the biggest players have a massive data advantage, control your latency, and are effectively unregulated.
An alternative possibility is that a rideshare company sees that Alice always takes the price that's offered so Alice receives the standard price, whereas Bob is price-sensitive so he receives personalized discounts on rides until the prices reach the amount that he's willing to pay.
That's exactly right. This is a big market and this gives consumers another option to choose best priced rides. Think like you mentioned such as booking.com, sky scanner, Agoda, Expedia etc etc. Competition is good.
App Review didn't object to that. There are various apps on the App Store today that rely on reverse engineering, such as unified messaging apps, alternative rideshare price comparison apps, and driver-side rideshare aggregators.
App Store review is really just luck of the draw in my experience. There is usually no rhyme or reason to a decision, changing some minor thing and re-applying works a lot of the time.