I have ad blockers on my desktop browsers, but I wasn’t aware of anything that would block the internal ads for an iOS app, which is why I went Gold.
For someone who wanted use Cronometer for free with a web browser, I would recommend they use it with a decent ad blocker.
Depending on your definition of nerd or geek (I prefer geek), I’m a geek’s geek and I love all the data!
I’m a multi-faceted software developer that spans being a software engineer, database administrator, virtual network engineer (waning hardware skills), as well as a former paramedic, and paraphrase @Marty_Kendall who says, “I’m an engineer and I believe that a large enough spreadsheet can solve any problem.” 
I currently own the paid/subscription versions of MyFitnessPal (MFP), Cronometer (COM) and KetoDietApp (KDA).
I actually enjoy dual-entering the information into iOS apps for COM and MFP, but I can’t stand to even open KDA; I respect that some people like KDA, but there are too many steps to do the same things in COM and MFP and it just looks unpolished. I know that KDA is a work-in-progress and I will continue to watch it.
Regardless of their official designations, but considering their features, performance, and reliability, I would classify COM as late beta, MFP as early beta and KDA as alpha.
@mikki likes Fat Secret, but so far haven’t looked at it to see where it fits into the available apps so far.