Get some insights from the location history Google saves from your phone or tablet

parse_location_history.rb

require 'json'

data = JSON.parse(File.read("location_history.json"))

num_locations    = data["locations"].length
accuracy_sum     = 0
activities       = {}
total_activities = 0

puts "Number of locations: #{num_locations}"

data["locations"].each do |location|
  accuracy_sum = accuracy_sum + location["accuracy"] unless location["accuracy"].nil?
  if location["activitys"] && location["activitys"][0]
    activities[location["activitys"][0]["activities"][0]["type"]] = 0 if activities[location["activitys"][0]["activities"][0]["type"]].nil?
    activities[location["activitys"][0]["activities"][0]["type"]] = activities[location["activitys"][0]["activities"][0]["type"]] + 1
    total_activities = total_activities + 1
  end
end

puts "Avg. accuracy: #{accuracy_sum/num_locations}m"

activities.each do |activity, count|
  puts "#{activity}: #{((count.to_f / total_activities.to_f) * 100.0).round(2)}%"
end