Today’s apps gone free: Gloomlogue, Olo, xSky and more

Give your photos a gloomy look, compete against friends in disk sliding mayhem, and get a good look at the night sky with today’s collection of apps and games.

All app prices are subject to change at any time and without notice regardless of stated free duration. Price changes are solely under the control of the developers.

iPhone:

Real Fireworks Artwork Visualizer ($0.99 → Free, 4.2 MB): Put on your own fireworks show with this entertainment app. It’s for anyone interested in putting on an Independence Day fireworks show.

Tap all over the screen to set off colorful explosions, or change a variety of parameters and allow the app to perform the show all on its own. You’re also able to choose from seven different modes, including one that allows you to draw your own images. The app includes multitouch controls, five color options, the ability to capture and share your works of art, and TV-out support.

Real Fireworks Artwork Visualizer is available for free for a limited time. It has a 4.5-star rating with a total of 118 ratings.

Gloomlogue ($0.99 → Free, 17.7 MB): Add a little gloom to your photos with this powerful effects app. It’s for anyone who wants to give their photos a more moody, film-inspired look.

It requires very little effort to transform your photos into illustrated gloom paintings. Just choose a photo from your library or take a new one from within the app. Then drag the gloom slider to adjust the intensity of the effect. After that, you can take your photos to a whole new level by applying filters, text, borders, and distortions. Your creations can be shared via Facebook, Twitter, Instagram, AirDrop, or email.

Gloomlogue is available for free for a limited time. It has a 4.5-star rating with a total of 1881 ratings.

Universal:

NC – Twitter Widget for Notification Center ($1.99 → Free, 34.2 MB): View your Twitter timeline and mentions within Notification Center with NC. It’s for social media addicts who can’t live without checking Twitter every few minutes.

Just launch NC and sign into your Twitter account. Then swipe down to bring up Notification Center and scroll all of the way down to the bottom to find the “Edit” button. Add the new NC widget to Notification Center with a tap, and you’ll immediately see the last five tweets in your Twitter timeline. You’re able to favorite and retweet tweets right from Notification Center as well. NC also offers the ability to display mentions instead of your timeline.

NC – Twitter Widget for Notification Center is available for free for a limited time. It has a 4-star rating with a total of 28 ratings.

OLO game ($2.99 → Free, 16.4 MB): Slide colorful disks around the screen in order to get more into the target zone than your opponent in OLO. It’s the perfect game for those who enjoy competing in real time with their friends.

OLO is multiplayer gaming perfection thanks to its slick graphics and silky smooth gameplay. Your goal is to get as many of your own OLOs as possible into the target zone on the opposite side of the screen by sliding them into place. If you miss the target zone, your opponent is able to use your OLO as their own. You can also strategically bounce your own or your opponent’s already used OLOs into and through target zones. The game includes local two- and four-player multiplayer options, online multiplayer, voice chat, and achievements and leaderboards via Game Center.

OLO game is available for free for a limited time. It has a 4.5-star rating with a total of 3388 ratings.

xSky ($0.99 → Free, 66.1 MB): Get a good look at the night sky with xSky. It’s for everyday stargazers and aspiring astronomers.

Unlike similar apps, xSky really focuses on the view. The interface is clutter-free, sporting only three small icons: search, lock, and settings. You’re able to look around the sky just by holding your iDevice up and rotating. When something catches your eye, lock the screen and pinch to zoom in close. You can also search for objects in the sky and have xSky point them out.

xSky is available for free for a limited time. It has a 5-star rating with a total of 23 ratings.

iPad:

Mystery Trackers: Silent Hollow HD – A Hidden Object Detective Game (Full) ($6.99 → Free, 1.0 GB): Solve the mystery of the masks and save your fellow agents in Mystery Trackers: Silent Hollow. It’s for fans of hidden object adventure games.

The Mystery Trackers’ headquarters has been taken over by a long-time enemy bent on revenge. You must investigate the building and Silent Hollow in order to come out on top. Search through dozens of scenes for hidden objects, collect weapons and earn new abilities, and release your canine sidekick to investigate tight spaces only he can reach.

Mystery Trackers: Silent Hollow HD – A Hidden Object Detective Game (Full) is available for free for a limited time. It has a 4.5-star rating with a total of 10 ratings.

Real Fireworks Artwork 4-in-1 HD 2012 – Play Awesome Light Show, Enjoy Fun Visualizer, Make Cool Wallpapers and Draw Amazing Art with Colors & Glow ($4.99 → Free, 8.7 MB): Put on your own fireworks show with this entertainment app. It’s for anyone interested in putting on an Independence Day fireworks show.

Tap all over the screen to set off colorful explosions, or change a variety of parameters and allow the app to perform the show all on its own. You’re also able to choose from seven different modes, including one that allows you to draw your own images. The app includes multitouch controls, five color options, the ability to capture and share your works of art, and TV-out support.

Real Fireworks Artwork 4-in-1 HD 2012 – Play Awesome Light Show, Enjoy Fun Visualizer, Make Cool Wallpapers and Draw Amazing Art with Colors & Glow is available for free for a limited time. It has a 3.5-star rating with a total of 6 ratings.

That concludes today’s issue of Apps Gone Free. If you like staying on top of these daily deals, don’t forget to check out our free AppsGoneFree app. It provides all the deals each day, and even an archive of past deals that are still active.

Developers:

If you are a developer who would like to get your app included in our “Apps Gone Free” daily lists, here’s our basic set of rules:

It must have at least a three-star average rating at the time it goes free.
The app must not have been free numerous times (3+) over the last six months.
The free version of your app must not include ads.

To submit an app, simply send a request to tyler@appadvice.com with the subject “Apps Gone Free.” Please include the name of the app, a link to it in the App Store, when and for how long you intend to offer the app for free, and anything else you would like to share. We will take it from there.