The Activity Log for Nintendo 3DS does what it says it’ll do, but no more. It was assumed by many to be an expansion of Personal Trainer Walking (without the pedometers but with a game log), but all it does is record your steps and the amount of time you are spend playing games. Many still think that an expansion is necessary; I am one of those people. The 3ds is capable of a game like that; especially considering it would only need one save file, since only one person can carry the 3ds at a time. Other than the lack of anything interesting, the app is functional, unless you mess with the system clock. So its fine since it comes with the system but ifit didn’t it wouldn’t be worth getting.