Repeat Timer: Interval Remind 4+

I use this app to time my (mostly) daily repetitive stretching exercises & I love it. I shopped around quite a bit & this was hands down the best for flexibility & sound options. I find the interface a little confusing, but once a timer is set up, you can save under a unique name & it’s super easy to scroll through them.
My only issue was finding tones that didn’t quickly become annoying when repeatedly repeated every 10 or 20 seconds & it took awhile to make sure they were consistent across my timers because I set them all up before settling on the sounds that worked best for my needs & they were ALL futzed up.
Otherwise, once timers are set up, it’s awesome!
In fact, I love this app so much that I’ve considered looking into how Siri voice command works just to make it work without touching because sometimes I accidentally turn it off or scroll to wrong timer when I’m laying on the floor with phone next to me.

I don’t give many 5 star reviews but I’d give this app more if I could. It does exactly what I need it to do.
Sometimes I have flare ups of a condition that causes dehydration. I use this app to keep me on track with sipping water so I can keep my dehydration under control without drinking too much at once and getting sick.
Additionally, it’s super refreshing to have an app that doesn’t bombard you with ads. I don’t even need all the extra stuff from the “pro” in-app purchase but bought it anyway to support the developers as a thank you for making such a nice app to use. Who knew a simple timer could be this awesome!

Great app! Room for improvements.
---------
✅ I love the interval feature--I use that to take my breaks.

🤔I heard the alarm go off the first time I started using yesterday, but after that I haven't heard the alarm go off.

🤔Times I can recall not hearing the alarm: phone was asleep (ringer kept rolling but didn't hear alarm), and when playing music on my phone during the interval time--Iwant the alarm to play over the music. Are these valid reasons for the alarm not sounding off? Are there other reasons that I should be aware of?
EDIT: I discovered that my 'do not disturb' feature is on. The point is using this app is so I can concentrate on my task. So is there a way to override 'do not disturb?'

💡Is there a way to extend the seconds/minutes that the alarm sounds off for to make sure I've heard it? Maybe a way to manually turn off an alarm sound without stopping the timer?

💡Also often times I'm holding my phone and I'll look and see that the timer stopped. I assumed it's because I accidentally touched the stop button. Is there a feature to lock the timer screen and require a password to stop the timer?

💡 It would be great for the screen to rotate so I can sit my phone on its side.