It worked swimmingly.......

My understanding is, it collected no. of votes for pre-defined names of candidates from all precincts,,
and determine no. of delegates won by each candidate based on votes ,
and add them up, and compute percentages. Add some security measures such as passwords to modify data.

Does not sound like a difficult process.
I could write code for that in 3 days and test it for 2 days, and it will be bullet-proof App.

Then some other system could use grab the individual totals from Google Sheets in the background, and do whatever totaling it needed to from that.

No need for an 'app'.

Running a service with hundreds of concurrent users under variable environment conditions with loose user training is never that simple. No responsible software developer promises a bulletproof app, and no manager with two working synapses to rub together deploys a system without realistic testing.

Systems contain hundreds of thousands, if not millions, of lines of code. Mistakes and faulty assumptions are inevitable.

Remember the debacle with the initial Obamacare roll out, where the system crashed when more than 6 people tried to use it concurrently.

During my 37 years working as mechanical engineer, I was responsible for 300 apps for design and manufacturing, and they turned out to be bullet proof. Total lines of code exceeds couple of million lines. I built in so many checks to validate the input by users, no faulty design ever got through and every part machined by computer controlled machine tools was produced perfect. So it can be done with focus, talent and knowledge.

...everyone bitching about caucuses better take a look at your own state. If you still use electronic voting machines you are well on your way to a debacle of your own.

but from what I heard on the TV, was that not all of the precincts followed the correct procedure for the 2nd vote.

Caucuses are like the Electoral college, the person with the most votes doesn't always win.

One person - One vote.