Work your abs into shape with Clear Sky Apps’ fitness app, SitUps 0 to 200. We also have an app that allows you to convert standard and non-standard units, and a business app that turns your iPad into an interactive whiteboard.

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:

Convertible: Unit Conversion Perfected ($0.99 → Free, 2.7 MB): This is not your standard unit conversion app. Convertible is able to convert units of measurement, currency, and a whole bunch of non-standard and real-world units. Non-standard and real-world units consist of things like tigers, red blood cells, AAA batteries, and baseball bats. The app’s intuitive interface allows you to just slide the unit categories and measurements left and right to choose them. Conversions can be swapped and shared via Twitter or email. The app also includes five themes to choose from.

Convertible: Unit Conversion Perfected is available for free today only (10/10). It has a 5-star rating with a total of 20 ratings.

SitUps 0 to 200: Ab Workouts ($1.99 → Free, 18.0 MB): Work your abs into shape with this fitness app. It features a 10 week program that will help you gradually work your way from 0 situps to 200. The app includes audio coaching, achievements for performance that can be shared via Facebook and Twitter, and the ability to listen to music while exercising. Situps 0 to 200 will also be updated in the next couple of days with iPhone 5 screen support.

SitUps 0 to 200: Ab Workouts is available for free today only (10/10). It has a 5-star rating with a total of 5 ratings.

Atomic Ball ($1.99 → Free, 24.3 MB): A Brick Breaker-style game that’s absolutely loaded with content. Guide your paddle around the screen in order to bounce the ball into the highly interactive objects. Try to collect the power-ups and credits that fall while avoiding the power-downs. The game includes more than 90 handcrafted levels, 30 power-ups, touch and tilt controls, voice narration, and achievements and leaderboards via Game Center. It was also just updated with iPhone 5 screen support.

Atomic Ball is available for free for a limited time. It has a 3.5-star rating with a total of 1134 ratings.

Universal:

Super Action Hero PLUS ($2.99 → Free, 30.5 MB): Protect the universe from mysterious forces of evil in this side-scrolling action game. Take control of your action hero via on-screen controls and string together vicious combos to take out your enemies. As you progress through the game, you’ll have the opportunity to upgrade your hero’s looks and attributes. You can also have up to six different allies tag along to assist you in your quest. The game includes more than 100 mission, and achievements via Game Center.

Super Action Hero PLUS is available for free for a limited time. It has a 4-star rating with a total of 12 ratings.

QuickSearch PDF Reader ($4.99 → Free, 11.1 MB): A productivity app that makes it fast and easy to find text in PDF documents. You’re able to import PDF documents via the “Open In…” function, or you can transfer them via iTunes File Sharing. You can then search across all of your documents at once, or you can narrow down your search to a specific document. The app highlights each match in yellow and with a spotlight. It also includes multiple layout options, AirPrint support, multitouch gestures, and the ability to email documents. QuickSearch PDF Reader was also recently updated with iPhone 5 screen support.

QuickSearch PDF Reader is available for free for a limited time. It has a 4.5-star rating with a total of 6 ratings.

iPad:

MediaSlate Pro ($1.99 → Free, 2.7 MB): This business app turns your iPad into an interactive whiteboard. You’re able to choose from a wide variety of colors, line thicknesses, and line types. Then just draw or write all over the screen with the tip of your finger. You can project your work onto a monitor or television via TV-out support, or you can share it via email, Facebook, or Twitter. The app also includes a customizable interface, the ability to import images from your library, and undo and redo.

MediaSlate Pro is available for free for a limited time. It has a 4.5-star rating with a total of 13 ratings.

Prompterous ($1.99 → Free, 5.8 MB): Turn your iPad into a portable teleprompter with this business app. You’re able to import your work via Google Docs, Dropbox, or email, or you can generate a new document within the app. You can then adjust your text’s font, size, color, speed, and alignment. When you’re ready to present your work, Prompterous will go into a full-screen mode and automatically scroll the text. The app includes support for 24 formats, a timer, and the ability to manually scroll text.

Prompterous is available for free for a limited time. It has a 3.5-star rating with a total of 46 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.