Fortunately, I was able to click on Next Bus, which improves on the Iris service that SBS Transit provides. Instead of having to type in one service at a time, Next Bus replicates those LED boards that some of the bus stops in town have.
Type in the bus stop number (available at the bus stop) and it returns all the estimated arrival times of the SBS Transit bus services that stop at that bus stop. Particularly useful if you have a choice of more than one bus that you can take. And even if you're only waiting for one bus, it affords endless minutes of fun as you wait to see if the other buses do arrive at their estimated times (I clearly need to get out more if this is my definition of fun).
You can access Next Bus directly or use it via iSingeo.
Next Bus makes waiting for a bus just a little less painful.