I'm puzzled by the following time picker:

A time picker displaying all even hours and all multiple of 5 minutes

Proposing only the even hours is fine, but then why bother to propose minutes as well? It's strange to let the user choose 10.05 but not 11:00.

If that matters, this picker is part of a mobile app selling train tickets, and selecting 10:00 will display all trains departing from a specific station after 10am.

This picker has been like that for about one year, so I suppose it's a deliberate choice. Maybe this design has been proven to be effective? If so I'd be curious to have some references.

  • What is the time picker selecting, exactly? Outbound trains? Do trains only leave every 5 minutes on even hours? Dec 20, 2022 at 22:43
  • Yes it selects outbound trains. And trains can leave at any time.
    – Scarabee
    Dec 20, 2022 at 22:46
  • What is the name of the app? Looking at it may help figure it out. Dec 20, 2022 at 23:15
  • Trainline. Thanks!
    – Scarabee
    Dec 20, 2022 at 23:39

1 Answer 1


Honestly, if it's not clear why they are doing it, it's probably not a good design choice. Ideally in digital products most things should be self-evident and intuitive. Your best bet for figuring this out might be to email them and ask, because it is not clear at all why they choose this setup.

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