Why not allow users to add/remove their own exercises? They choose a name, and data they'd like to track for that exercise, such as distance, time, weight, reps. For example, they click Add Exercise, enter Squats as the name, and check the boxes for weight, and reps. Now, after their workout, they just click the Squats button under My Exercises, and enter the reps and weight they did for that day.
Seriously, it sounds like this guy doesn't understand how to take a taxi.
Call a taxi, they'll give you an ETA of when they'll arrive. At the same time, ask for a flat rate to the airport including tolls (airports are typically flat rates from most cities), and whether or not they accept your method of payment. Or, if you're hailing a taxi on the street which typically takes a minute or two in any major city, ask the driver before you get in for a rate, and see if he accepts your card.
I've taken taxis in a dozen different countries around the world, and I never remember a taxi that was particularly dirty. I took three rides with strangers last weekend, and 2 of the 3 I had to move papers, books, bags, etc off their seat before I had room to sit down. They also had papers on the floor, and the odd empty bottle rolling back and forth under the seat. I don't mind either, but on average I find taxis to be cleaner.
Sure you can rate a taxi. The first thing I do when I arrive in an untrustworthy city is checkout taxi reviews. There are always companies that will charge you 2 or 3 times the typical rate because you're not from the area, but at the same time, there are always a couple reliable businesses that people swear by, and you save their number, of watch for their taxi when waving them down on the street.
