chesstempo.com/mobile). For about 5 years now, I've wanted to solve ChessTempo problems on my phone, but it just wasn't feasible to use CT on a phone.
Recently, I've been able to use my tablet to solve problems on the go, but there are still times when I'm waiting around and I only have my phone with me and I wish I could play on CT. Now it's finally here.
I tested it out on my tab as well and it's phenomenal! I had my tab set up so the board was maximized as much as possible, but despite that, I still had to scroll up and down after each problem. Now, with the mobile site that problem is fixed.
There appears to be some minor kinks that Richard (the site admin) will have to work out. He's requesting feedback at this forum thread. The issues I've noticed have already been identified.