Space out This week's roundup includes two similarly named apps that have very different functions.History VaultThe new History Vault app features \u201chundreds of hours\u201d of documentaries and specials from the History Channel\u2019s archives; pay just $5 a month for commercial-free on-demand video content\u2014no TV provider needed.RememberThe free Remember app for iPhone is kind of like a contacts app on steroids; when you enter the name and number of a person, the app researches that person\u2019s background and adds details. The app can also remember where you met a person\u2014and nearby locations\u2014to help you better remember the context of your first meeting.The RollThe Roll is a free iPhone app that \u00a0\u201cmakes your photo library smarter, grouping the best shots, events and albums so you have half the screen time.\u201d Developers say the app uses an algorithm to identify the best pics in your camera roll.SpaceSpace, a $4 iPad app, lets you create asteroids, nebula, comets, experiment with gravity and other forces of nature. Also: It\u2019s fun.\u00a0SpacesSpaces is a new app from Google, which is still trying to get a foot in the door on this whole social media thing. This app lets users create small groups of friends and acquaintances who share a common topic interest. You can comment, search, and add YouTube links to posts.SoundHoundThe latest update to SoundHound adds voice control: Just say, \u201cOK, Hound,\u201d then instruct the app to play a track from any of several music services\u2014including iTunes, Pandora, and Spotify\u2014that you use.Yahoo MailYahoo Mail is getting prettier, letting users choose from several different \u201cstationary\u201d designs to gussy up their emails to friends, family, and co-workers.YouTubeYouTube is adding Google Cardboard support\u2014any video you watch on your phone can now be viewed in virtual reality.Others of notePodbean\u00a0(pictured) has overhauled its user interface \u2026 Packing Pro\u2019s \u201cmajor overhaul\u201d includes the addition of \u201csmart search\u201d \u2026 PDF Expert has Apple Pencil support. \u2026 Adobe\u2019s productivity apps have been rebranded under the Adobe Spark umbrella.