This app was mentioned in 2 comments, with an average of 4.00 upvotes
As the guy who coded it: thanks for the mention on this splendid subreddit :) Glad you found the app useful.
With regard to the ping script there is/was a very good website at http://dota2timers.lixend.com which you can alt tab to and press start on 0 seconds and it will make various sounds for stacking, runes, courier purchase etc that can be very helpful as a reminder for various reasons. Sadly the domain seems to have expired at present.
There looks to be a similar Android app on https://play.google.com/store/apps/details?id=net.th4t.android.dotatimingtrainer
Not tried it myself though, I'll give it a go though