I haven't used Fever personally, but I do know the popular Reeder RSS client for Mac and iOS has Fever support.

That's true, but you'll have to recommend something as an alternative instead, since there is only a finite amount of RSS services; I say that as an RSS power user.

Beggars can't be choosers. :)

I also vouch for Fever. Someone on HN recommended Fever to me when Bloglines initially bit the dust a couple years ago and it meets every need I've wanted from an RSS reader and more. The genius of it's design is that Fever gets more useful the more RSS feeds you subscribe to, which initially seems counter-intuitive, but is brilliant.

I don't know what you mean by customize, but the extent of customization only extends to grouping feeds in folders and choosing how and in which order to display them.

So I wouldn't call it customizable.

Is the software any less useful because it's not created in a trendy language?

One of the advantages that PHP has is that virtually any cheap web-host in the world can run it. It's not a bad choice to sell a self-hosted product in PHP because of this advantage.

I'm not a huge fan of PHP for many types of projects, but I don't see how it benefits anybody to reflexively hate on something just because of a technology choice.

We're here to make $$$, not to be trendy. There's plenty of good reasons to use PHP, especially if commercial viability is a primary goal.

PHP and MySQL aren't that bad (and support for them is pretty much guaranteed on every web host).

However, the fact that it supports PHP 4.2 and MySQL 3.23 makes me wonder how old the code base is! Makes me think it's using so many obsolete PHP methods, the deprecated MySQL extension, and is all procedural code (which almost always seems to be spaghetti code with PHP).

It works reliably on simple shared host. The developer rolls out automatic updates as well. PHP is a perfectly fine solution for this purpose.

If it works, it works.