The apps and sites analyzed are typically intended to replace the current SL app. They often provide a subset of the standard "Travel planner" features but add some of their own, such as crowdedness estimates, train location, alarm clock or push notice updates. Sometimes they provide traffic information on "off-line" platforms such as public information displays or signs.
The user is often faced with having to learn new systems or deal with expected features being absent. (Which as a side note happened just the other day when I asked to use another group members phone to check the bus departure times. In this case the app had no "real time" information.)
There are frequent concerns about reliability of service and accuracy of the information. The alarm clock feature of "Google Now" apparently requires both working GPS and Internet connection, for example.
In general, these traffic information systems don't handle major traffic disruptions well, which is unfortunate since the information is much needed during such events.
In conclusion, despite the many travel planning apps out there, we believe there is still a need for a well designed and well-featured app. It should have a powerful UI, clear visualizations, be able to accommodate both novice and advanced users, and be using a reliable statistics engine capable of integrating real time information with historic data.
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