Simple Bitcoin Ticker is exactly what its name implies. Look at it:

Features:

• Real time: As any good ticker should be, it shows the current MtGox exchange rate up to the instant.
• Ticker: It’s also a ticker.
• Rejected: Apple didn’t let it in the store because it was too simple.

That pretty much covers it. If you want a real-time MtGox ticker on your phone, this would have been the one for you.