Great app!
I’ve used this app on and off for years and it’s the only one I’ve found that gives you a graphic display of your gear ratios. The app allows you to save up to five configurations with different chainring and cassette combinations and, for example, do “what-ifs” to an existing setup, which can be very useful when considering a change e.g. from 3-by-9 to 1-by-11, or simply a change in chainring size. This app is really good but it could be tweaked slightly to be even better. It needs to accommodate 12 speed cassettes (it only goes up to 11 at the moment), and the option to display two setups side-by-side would be nice. But it’s still worth four stars as it is.