Interval Timer - Tabata Timer 4+

I originally got this to use for timing Fartlek runs and speed intervals. The cycles are easy to customize and provide great feedback through sound and vibration. But then I started doing interval training at home (circuit, HIIT, and technique drills). Now I could add in visual keys and create complex hour long workouts and practices. Colors, sounds, titles, intervals, rests, cycles, repeats, all are customizable on the free app. If I could add one feature, it would be either a three period cycle or a cycle start warning, so that I can do high/low/get ready or left/right/rest. If I could make one change, it would be the ability to make a one time premium purchase instead of a subscription. I would like to put some money towards the app, perhaps for new templates (like the suggestion above) or for sharing, but I am wary of subscription services over one time purchases.
That said, I now use the premium service and is has even more flexibility, to the point that I use it over even physical timers at the gym.

This app used to be good. So good. Almost too good to be true but unfortunately things have changed for the worse in very saddening ways. The Trump ads don’t bother me, as much I dislike him I couldn’t care less about his ads, but other changes are extremely frustrating. No longer can you have this app open while playing audio in another app without sound stopping every 5 seconds (due to ads apparently), no longer do timer sounds work properly when the app is open in the background and no longer do the developers seem to care at all about providing a product with some semblance of consumer satisfaction. The worst part, however, is that this is still the best app of it’s kind on the App Store. So until a better one comes along, I guess I’ll have to suffer through this one.

This is a pretty good app for what I need it to do and for it to cost nothing. I’m satisfied.

Update:
If you want a timer app you can use without paying for, I highly recommend Interval Timer - Tabatha Timer. It’s customizable. It does have ads, but they scroll through them at the bottom of the screen while the timer is running and doesn’t interrupt your workout at all. It even runs while the app is minimized, so you can still listen for the sounds of when each interval ends, so highly useful. You can even control your music from the app. :) It does not interrupt my music playing in the background on my iOS device.

The one criticism that I’ve run across is that the app has become more glitchy as of late. I had to remove the app and add it back to my device b/c it would freeze up once I opened it. Unfortunately, doing this wiped all my saved interval timers, so I’ll have to recreate them - boo! But not a huge deal b/c they’re relatively easy to recreate. Also, after reinstalling it, I noticed that the timer occasionally freezes up or get stuck even though the timer isn’t paused, e.g., sits on 4sec left in an interval for more than 4sec. :/ I haven’t seen this happen too much yet, I only reinstalled it a week ago, but will be something I keep an eye out for, and may cause me to update my review further by dropping more stars - a timer that can’t keep time is a deal breaker.