No more Echofon on mac. Suggest alternative?

I usually use Echofon on my Mac (desktop, not Macbook) as my Twitter app. I;ve always found it to be easy to use and have a decent and simple interface.
However Echofon are no longer supporting their program on Mac, Windows or anything that is not an Ipad or iPhone.
To come with this change in policy, they released one last version that REQUIRES the latest Mac operating system to use, and quite frankly I can't be bothered to buy a whole new OS just for an app that will no longer supported.

As such, I need a replacement.
I'm asking for suggestions, my general requirements being that I'd like a clean and simple interface, and I need to be able to use multiple profiles. It's ok if I have to switch between them via a button like with Echofon, but if there's one out there that can show two profiles at once I'd love that more.

So, suggestions please.

Apple apps and iOS problems?

Hi, I'm using the iPhone 4 & iPad 2, both using iOS 5. They both have the YouTube app (the old one) and I accidently update my iPhone 4 to iOS 6.1.3 and the YouTube app is no longer available so I plan on not updating my iPad 2 because of that YouTube app. I do not like the new one because its realt complicated and the old one doesn't have any advertisements popping out. In both my iPad and iPhone, I also have the older ver. Of twitter and I do not want to update it. I'm wondering, in the future, will I still get to use the old twitter on my iPhone if I keep updating to a newer iOS (if there's one) but not updating twitter?

Also, if I do not update my iOS 5 on my iPad, the same as my iPhone 4, will twitter force me to update to a newer ver. Of twitter & iOS to continue using?

If I use my iphone as a hotspot to transfer Wi-fi, does it consume my data anyway?

I have Wi-fi in my home. But my laptop has been having problems connecting to my router. My iPhone has no problems connecting to my Wi-fi.So, I've been using my iPhone as a hotspot to transfer the Wi-fi to my laptop. Does this consume my data? When I connect my laptop to the iPhone, I make sure the iPhone has the Wi-fi on and the Wi-fi icon is showing.

What does it mean when snapchat disk is full?

When I try to send a snapchat it sends a popup message that says Disk Full. Please free up space on your disk and try again. I don't know what disk this is referring too… I have an iPhone and I've tries clearing all the snaps I've been sent but that's it. Any ideas?