The complete guide
Choosing the right timer length for naps versus a full night
A timer sounds like a minor feature until you're the one getting up at 4am to switch off a sound machine that stopped four hours too early, or worrying about one that never stops at all.
Why an 8-hour option is genuinely different
Most sound machines top out at 1 or 2-hour timers, built with naps in mind rather than a full night. The Kipcush's 8-hour auto-shutoff is specifically aimed at the overnight stretch, so you can start it at bedtime and know it will switch itself off by morning without anyone needing to intervene, rather than leaving it on continuous play indefinitely or setting an alarm to turn it off manually.
Matching timer length to the actual sleep stretch
For a 20 to 45 minute daytime nap, the 15 or 30-minute settings make more sense than anything longer, since the sound has done its job once your baby is asleep and you don't necessarily need it running the whole time. For bedtime, the 8-hour setting removes the guesswork entirely, treat it as the "set it and don't think about it again" option for overnight sleep specifically.
Continuous play still has its place
Some households prefer sound running all night regardless of what the timer offers, particularly in noisier homes or shared bedrooms where background masking matters throughout the night rather than just at sleep onset. The continuous play option exists for exactly this, and because the light and volume are on a separate tap control, you can always adjust brightness or turn the light off independently even while sound continues.
Let the memory function do the remembering
Once you've settled on a nap routine and a bedtime routine, the machine's memory function means you don't need to reselect the same timer length every single time, it returns to the last used setting automatically. The only real decision left is which stretch of sleep you're setting it up for.