It’s easy to find and download free apps that will play a meditation bell at the end of a time that you set.

And many programmers can too. It’s not difficult, except that most of us are rather busy. Maybe a few of us can work together and put it up as an open source freebie. We can also create it as an applet to run on various types of computers, atblets and phones and upload the results to a website. I’ve done more complex stuffs. But you need a leader to plan and organize things. Check http://sourceforge.com where people get together to work on programs and contribute everyone’s bit. It’s mostly on volunteer basis so people come and go as they are free/busy. How do you want to proceed?