I want both.
Paper one for basic log, position, speed, observations, etc. At the very minimum, enough to go back to for DR purposes. But I like reading through a log that is in different colors of ink, sometimes faded, sometimes with a coffee stain on it, sometimes loquacious, sometimes terse, sometimes in a shaky hand. It tells a story that can't be told in an electronic log.
Electronic for auto location, speed, fuel-flow meters, engine
temps, etc. And optionally adding the same things I put in the paper log. Probably update the electronic one from the paper one each time at anchor
, as a backup. It would be more for analysis and long term record keeping.
But since I want the electronic one to be automatic and read instruments (even tank levels), then an iPhone app would be of no interest to me.