As do I. However, a light meter with an ongoing monthly cost of US $70 (even if it's a shared cost) doesn't appear to me to be one of the best bargains out there, and that outlay is required before one can use the app. Obviously individual folks will decide for themselves about that, and the apps are selling.
At the risk of descending into a pointless circular off-topic argument which the internet is so good at, my point was predicated on the assumption that one has an iPhone already...certainly a more reasonable proposition than one that somebody would get an iPhone just for an app.
As you were....
"Never criticize someone until you've walked a mile in their shoes. That way, you're a mile away and you've got their shoes."