I notice that the clocks in many of my field projects that use the old DS1302 chips drift about 2 or 3 minutes a month. These projects are not near wifi or any ability to poll NIST, so they have to be standalone. While I give the users a very simple keypad entry time setting function, I'd rather that they don't need to set them every few months.
The DS3231 looks like it has much greater stability... does anyone here have any experience with that chip? Thoughts as to it's performance over the old DS1302?