Noom Walk is described as 'pedometer that counts your steps all the time without killing your battery:' and is an app in the sport & health category. There are five alternatives to Noom Walk for iPhone and Android. The best alternative is Pedometer Ultimate GPS +. It's not free, so if you're looking for a free alternative, you could try KeepTrax or Pacer Pedometer and Weight Loss Coach. Other great apps like Noom Walk are Lefft and Home Walking & Exercise.