A new week has dawned, and with it comes a new list of great things happening on Android. This is the Google Play App Roundup where we tell you what needs to be on your phone or tablet right now. Just click the links to head to Google Play and grab these apps for yourself.

Have you ever heard someone online or in real life talk about a movie and think it sounds like something you should check out, and then, months later you realize you completely forgot about it? CineTrak might be able to help you avoid that. It's a movie watchlist tracker and info browser that pulls in data from various sources and syncs to the Trakt.tv service.

The app is done in Google's material design from top to bottom. The main interface is the "Discover" page. At the top are a series of tabs that show movies based on criteria like trending, popular, most watches, and box office. You can use the app without Trakt.tv login, but your lists and watch stats won't be available on other devices. You can switch to upcoming, my lists, or my collection in the navigation menu.

Whenever you come across a movie, you can add it to your watch list by tapping the floating action button. That same button then becomes a "check-in" button. You can tap that indicate that you're watching the movie, and share that activity with the app of your choice. When it's over, tap again and the movie goes into your previously watched list. To undo all of that, tap one more time and the movie is removed.

The info page for each film includes the sort of data you'd get on something like IMDB, but I find the interface much more pleasant. It has ratings aggregated from Rotten Tomatoes, IMDB, Metacritic, and Trakt.tv. There's also a cast list and a trailer.

The bookmark icon at the top of the info page lets you add a film to your library. It seems like this should get a more prominent button as it's one of the main features of the app. When adding, you get to pick the format, resolution, and date of acquisition. Then, you can scroll through the collection page to see all your stuff.

CineTrak is free to use, and you don't have to sign into Trakt.tv if you don't want. However, there are a few ads in the app by default. A $2.99 in-app purchase will remove them and add staff picks and additional curated lists.

It should come as no surprise that you play as a ninja in Mr Future Ninja. Although, technically you play as two ninjas. Your goal is to defeat the evil company that has abducted your ninja clan. They want to clone your ninja buds and sell them as "Mr Future Ninja," and you can't let that happen.

This game has a clear resemblance to Monument Valley, but that's only at first glance. Mr Future Ninja is a stealth action game with a little puzzling thrown in. Your goal in each level is to reach the exit without falling, being zapped, or exploded by a sentry. Easier said than done.

Your two ninjas each have their own skill. The pink ninja can throw a shuriken to disable enemies, trigger switches, and create diversions. The blue ninja can dash across gaps and around enemies. By default, the two move as one, and you can tap on the ninja head next to your action button to pick the "lead" ninja whose skill you'll use. You can also drag one of the heads away to let them move around the level independently (they join back up when you move them close). All moving is handled by the virtual thumbstick opposite the action button. Simply tap the ninja you want to control (if separated) and get moving.

The levels offer a good mix of puzzle solving and stealth. You often have to watch how the guardbots move, then distract or disable them at just the right moment. Remember, your footsteps make noise that attracts the guards. If you're spotted, everyone's going to start shooting. Luckily, the levels have checkpoints where you'll respawn is things go wrong.

The visual style is one of my favorite things about Mr Future Ninja—it's just a blast to explore. The world has the same blocky appearance as Monument Valley, but the colors are neon retro with lots of lighting effects. The color palate changes up frequently as well, which keeps things interesting.

Mr Future Ninja is not free, but you only have to buy it once. $3.99 and the entire game is yours.

The interest in 2048 a few years ago led to a number of interesting takes on the "merging" puzzle game. We've covered a few of them in past roundups like Merged and Atomas. Infinity Merge has the same basic gameplay, but there are a few twists that make it worth checking out.

You begin each game with a few red icons with a single dot. You can swipe in any direction to move all the pieces as far as they can go in that same direction. If two or more icons are the same, they will merge into a single icon of the next level. Each icon has a different, shape, color, and number of dots. Each turn, a new low-level piece will spawn. The game is over when you run out of spaces and have no moves. The game pieces have bright colors and the animations when you swipe are very well done.

You can merge two or more, and it's the or more that's the important part. If you can line up three or more icon, you get a point bonus and you will level up all the matching icons on the board. That makes it easier to clear things for a few turns. There are also a few special abilities to help you along. Each successful merge increases your energy. When it's full, as indicated by the button at the bottom, you can upgrade two random pieces. There are also two other powers that cost coins to trigger: one that adds two wildcard pieces to the board, and another that removes two random pieces.

About those coins, that's there the in-app purchases come in. You earn coins from playing, which are used to trigger the aforementioned powers, but also to unlock new game themes. If you want to spend a few bucks on coins, you can do that. The IAPs top out at $5.49, though. There are also ads that pop up after you play a round, but those can be removed for $0.99.