The good voice app looks to record your input, upload it to the internet and then pass back the answer.
Given how little horsepower is in these phones (yes, it's not that much) you see why they toss it up onto a big machine.
Maybe the old voice recorder at some office store will do better. Record on that then on your machine have Nuance munch on the results.
My 91-year-old dad wants to dictate some memories and review/edit them using speech-to-text. His MAC can be upgraded for Nuance only at more expense than this whim is worth. I tried an Android tablet with WiFi but no phone service and it didn't seem to want install the voice recognition apps, which it didn't come with. So here's my question: can I get an Android 2.2 phone on ebay, install Documents 2 Go using a flash drive, and have him dictate on that and transfer the results back to his computer using just the flash drive again? He is on my Verizon family plan but I don't want to pay for the data plan and I guess he can't just upgrade to Droid without getting one.