Recording weights??

what do ya'll use to record your kittens weights? i was using a kitchen scale, but it wasent digital so it wasent very accurate. also, if they are getting bigger and gaining weight, do i really need to weigh them every day? at first weigh in ( day 4), they weighed as much as 2 week old kittens.

There's a mechanical pet scale that's accurate to within two ounces and costs under $50. I don't remember where I bought mine, and I don't know if this is the cheapest vendor, it was just a handy link to show you the product:
http://www.amazon.com/gp/product/B00...470987-5700828