I worry about things like this as much as I worry about calculator use. Back in the day I had a data input job and I used to be able to glance at long strings of numbers and then type them straight into the terminal at lightening speed, same with counting, same with simple arithmetic. And I trusted what I'd entered without checking.

Now I don't trust myself at all - so an app like this is great. But I don't want to rely on it. What I do with maths is work it out in my head, as painful as that sometimes is, and then double check it. It's an attempt to keep my mind nimble but I don't trust myself - that's why I need a calculator and now Tally too.

(I like to think my mind has developed in other ways, though!)

While I haven't needed it to count anything yet, it is a wonderfully simple app that does brilliantly. I wish I had it when I was counting millions of fossil pollen grains and seeds in grad school...