If you use, but don't write MS Excel, you may be intersted in the following:
I like to record my weight at uneven intervals. Sometimes because I forget to weigh, it's inconvenient to weigh, or I want different information. While I'm at beginning induction, I want nearly daily information [while I learn]. Later if I presume things go well, I'm better off with one weigh-in each week. Even then, I might forget to weigh EXACTL in one week. Anyhow, I have a VBA program operating MS Excel which does the following:
one command button enters the current day--you can manually enter other dates.
After date, manually enter weight [I'm using eights of a pound]. Another command buttion calculates:
weight change since last entry
average daily weight change since the last entry
weight change since initial weight in chart
average weight change since initial date
A couple of buttons gives me the info I want.
Anybody interesting in having a copy would be welcome[free]--it can be sent as an attachment to e-mail. Of course, you'd have to
have Excel on your system.