Make quick work of calculations and edit them with ease with Critical Point's productivity app, Scalar: The Better Calculator. We also have a colorful rhythm game, and a collection of monster jigsaw puzzles.
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.
Alien Raid ($0.99 → Free, 21.4 MB): Fight off an alien invasion in this defense game. Fire all kinds of different projectiles from your mobilized units by tapping, dragging, and releasing your finger at just the right moment. You're able to score more points by landing consecutive shots. The game includes three environments, 48 levels, a challenge mode, and achievements and leaderboards via Game Center.
Alien Raid is available for free for a limited time. It has a 4.5-star rating with a total of 165 ratings.
Photo Guard: protect your private photos from prying eyes! ($0.99 → Free, 3.7 MB): Keep your private photos away from prying eyes with this utility app. You're able to protect your photos behind a pattern or passcode lock. If someone attempts to break in, the app will snap a photo via the front-facing camera so you can catch the perpetrator. The app also allows you to import and export photos in bulk, create albums, copy and paste, snap photos, and view photos in a slideshow.
Photo Guard: protect your private photos from prying eyes! is available for free for a limited time. It has a 4.5-star rating with a total of 14 ratings.
Animator ($0.99 → Free, 7.9 MB): Make your own animated flip books with this fun art creation app. You're able to construct your animation page-by-page. Each time you flip to a new page, you can choose to either duplicate the previous page to minimize your workload or you can just go off of a residual presence. Animations can be previewed before being sent off via Facebook, Twitter, or email. The app includes a variety of drawing tools, the ability to snap a photo and use it as a background, a user guide, and stat tracking.
Animator is available for free today only (08/05). It has a 5-star rating with a total of 39 ratings.
Scalar: the Better Calculator ($4.99 → Free, 15.1 MB): A powerful calculator app for your iPhone or iPad. The app keeps track of all of your calculations on an endless sheet of paper, so you'll never lose track of them. You can also edit your entries at any time, and the app will recalculate everything as you type. The app also includes the ability to reorder entire calculations, three sharing options, support for text labels, the ability to create and save multiple sheets, and copy and past support.
Scalar: the Better Calculator is available for free for a limited time. It has a 4-star rating with a total of 55 ratings.
Monster Puzzles ($1.99 → Free, 18.9 MB): Keep your child entertained with this collection of 20 monster jigsaw puzzles. Puzzles can be customized to match your child's abilities, with options to show hints, snap pieces into place, and show the puzzle in the background. The app also includes a child lock, and the ability to import creatures from Playtend's other monster apps to generate new puzzles.
Monster Puzzles is available for free for a limited time. It has a 5-star rating with a total of 12 ratings.
Rhythm Repeat ($0.99 → Free, 17.6 MB): A colorful rhythm game that requires you to repeat sequences in the correct order. As the beat is played, colorful buttons will pulse and be added to the bottom of the screen. It's then your turn to repeat the sequence in the proper order before time expires. Miss a note or run out of time and you'll lose a life. Lose all three and it's game over. The game includes more than 300 melodies and beats to play, three instruments to choose from, and leaderboards via Game Center.
Rhythm Repeat is available for free for a limited time. It has a 4.5-star rating with a total of 38 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. 
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