I use the iPhone Apps - Acro Bible ESV | Apptism which is excellent when you are travelling and want to look up a refrence or suddenly have a thought and want to search for a word or phrase to find the text you are thinking of.

It is not ideal for extended reading but it usefull to ensure that you have the full text (with excellent search options) with you at all times.

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Mike
London City Presbyterian Church
London
England

"Surely, we wish to be orthodox, but we must first learn what real orthodoxy is. Surely, we wish to be progressive, but we must first have a basis to progress from."