That's why we installed
Tapatalk. Unfortunately it requires you buy the app for your phone to use it.
<Aside>This is where I hate the app store. There is no trial option. If I compare it to buying something like a shirt: When I buy a shirt, I can walk into the shop and try it on to see if I like it. You can't do this with the app store. You get shown a discription of it and a couple of screenshots and have to make your decision there. This is very much like ordering a shirt mail-order. You get a few photos of it and order it. Except that with the shirt, when it gets sent to you - if it doesnt' fit or you don't like it you can send it back and get your money back. There is no option for this for the app store. You have to take it on faith that it will do what you want and not be annoying before shelling out your money and if you don't like it then you've lost your money. A lot of apps have 'free versions' that are limited/add supported that you can use as a trial and then upgrade if you like it. Apps like these are the only ones that I have bought from the App store.
I am trying to find a uPnP media player that can stream videos from my MythTV setup to my iPhone. I've tried about 6 free/ad-supported ones and non of them work with Myth. There are many more that are payware, but with no guarantee that they work or do what I want them to do I could shell out about £30 on various ones and still end up with nothing that works. I'd like to see whether Tapatalk is worth the £2 to browse the forum easier on my mobile, but without trying it for myself I have no way to know and I don't want to pay full price to try it as I hate that kind of forced marketing and would rather punch them in the back of the head than bow to their arsehole marketing strategies.
Given the App store/iOS is locked down* you'd have thought they could easily and securely implement a trial feature. But then again, this would reduce the number of purchases made on faith and thus their profit, so why would they bother? Making money by screwing customers over looks better in the board room than pleasing customers.
*Ignoring jailbreaks, where you can get full versions of all the apps for free anyway.