If you have a Nexus 5, Moto X, or LG G2 (or other recent high-end device) that features a hardware step sensor AND you want a pedometer with the NEW Android UI (called Material Design) then take a look at Pedometer (by Ivin Liu)…
What I like about this particular pedometer is that it is not tied into the GPS feature of the phone, which means better battery life, and it is specifically (and simply) designed to do what a pedometer does and that is track your steps (and distance).
– Set your goal! It is recommended that you take 10000 steps a day. This app allows you to set a goal that’s right for you, and displays your current progress.
– Track your progress with a detailed list of history entries. Unlike other apps, Pedometer’s history feature will keep track of all the info from every day you walk.
– Split counter for activities! Create and save activities so you can separate how many steps you took in that one jog from the rest of the day. Useful for tracking progress over a particular activity rather than throughout the whole day. Free version is limited to the creation of 5 activities, purchase pro to unlock unlimited activities.
– Colorful themes: choose one of 6 colorful themes that use the new material design. Dark themes coming soon.
– Low powered: Unlike other pedometer apps, this one will not affect your battery life at all.
– Achievements and leaderboards: sign in with your Google+ account to unlock both single and multi day achievements and compete with your friends in leaderboards!
– More than just steps: Pedometer also shows you how far you walked and how many calories you have burned today.
– Devices with a hardware step sensor, such as Nexus 5, Moto X, or LG G2. Most recent high-end devices will also have this sensor. The hardware step counter makes it possible to keep the pedometer active without any additional battery drain.
– Android 4.4 KitKat or newer: The latest version of Android provides APIs to utilize that hardware step counter