If you need a Large and simple Countdown Timer, Timesolutely lite is the app for you. It is a very high quality short Interval Timer and Quick Alarm with very large digits.The app was designed in particular for these use cases.
[Top ten] Great job
Countdown Timer is great! The numbers are LARGE & easy to set, & though they don't emphasize it there is an alarm! Full range of tones. I will probably replace my alarm timer with this, as old one has only a few tones, none I care for. Oct 2014 still loving it. Use most often to ensure I don't stay in hot tub too long.
Tips for using the product
I love the fact that you can repeat same count down...I just wished it had the option to repeat same time for whatever times you would set it up for. Let's say every half an hour it would beep for x amount of times so I didn't have to go to my phone to repeat.