Task List Prioritization App for Android/Google Spreadsheet - repost

I have a To Do list in Google Spreadsheet that i want to be able to prioritize by using a calculating tool/action I learned at a seminar. Basically, the whole To Do list is in a spreadsheet in no certain order. (Each item is assigned to a category, but that's not important at this point.) The user compares item #1 against item #2, and decides the winner and the loser, the one that is most important gets the point and is the winner. So each winner gets a point calculated in a separate column. These points will determine the MOST important to the LEAST important task, once all items have been compared and awarded the winning point. The item with the most points, is most important, and so on. After item #1 is compared with #2, item #1 is then compared with items #3 - however many tasks are on the list, awarding a winner each time, with the calculator tallying. Then, the user starts over at the top with #2, and compares it similarly against items #3 - whatever. Then, user compares #3 against every item. And so forth, until the user is at the bottom of the list. He then clicks sort to sort list by Most-Least important. This gives the user a plan of action based on what's most important. It will be important to be able to use this tool on your iphone/Android, but also on your laptop in Google Spreadsheet/Drive. It should also have status and due date fields as well, not necessarily to sort on, but to mark when a task is done, or in progress, or not started. If we could make it filter all items in a category, and then prioritize, that would be ideal. We need a way to clear the calculation, too, so that if you don't pay attention to your list for a while, you can easily add new items, mark off old ones that are done, and re-prioritize the list. Basically, the goal, is to be able to look at your phone to determine what needs to be done NEXT.