I'm a little confused why you need a clock with such specific tech features if the problem you're having is with tech failing. Don't you think this type of system could fail easily? Personally I'd go with a very basic clock in this circumstance. This has worked well for me for years. It has two alarm options, so I set one for my week time and one for my weekend time. Just turn them on and off manually. It has a battery backup feature for if you lose power, and adjusts to daylight savings time. I know this isn't what you asked for, but just my two cents.