I feel like I've checked a dozen apps, and they all do the same thing: use start _time_ and end _time._
Im traveling through time zones constantly, and this messes all those apps up because they're thinking they should adjust for the time zone I'm currently in, which throws everything off.
I just need something that counts 18 hours, then 6 hours, repeat, so that regardless of time zone I can keep the same schedule without having to put a lot of thought into it.
Does such a thing even exist?
Answer
Just use a regular timer app. I like Timer+. It can do multiple timers, counting up or down, repeat timers (for instance 2 hour timer that repeats 4 times, with an alert at each interval). Ability to name each timer and set its own background.