Pichak co. has Recordium Pro (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $6.99) for a limited time.

Recordium is a powerful yet elegant recording app designed for iPhone, iPad, and iPod Touch. Recordium lets you highlight the track while playing or recording audio, helping you focus on the most important parts of your recordings.

Attachments such as notes, tags, and pictures can be easily added to any part of the recording. This enables searching among your recordings, allowing you quick access to the most important and highlighted parts of your tracks.

Recordium’s intuitive user interface, smooth playback, and multiple options for customizing the size and quality of the recordings using various compression algorithms are among the features that make this app an essential tool for everybody, especially students, journalists and musicians.

Perfect Dimension has Convertizo 2 (iTunes Link) for the iPad in the iTunes App Store for FREE (regularly $2.99) for a limited time.

Convertizo 2 is a clean and reliable unit converter for your iPhone, iPod Touch and iPad. Built from the ground up with an iOS7 inspired look, Convertizo 2 features an intuitive user interface.

Designed to be as simple and easy to use as possible, Convertizo 2 is capable of converting between hundreds of different units and includes up to the minute live automatic exchange rate import for conversion between currencies.

Assets are fully optimised for the retina screen both on iPhone and iPad.

Unlike other converters, Convertizo 2 also includes both metric (US) and imperial units.

Appxy has OneKey Pro (iTunes Link) for the iPad in the iTunes App Store for FREE (regularly $4.99) for a limited time.

With OneKey, you don’t need to remember all the usernames, passwords, web addresses and those boring information in modern life. OneKey provides a safe and simple way to store and manage all your passwords and private information. It can save your credit card details, PINs, bank accounts, notes, web site logins…etc in a highly secure position.

OneKey uses 256bit AES encryption to protect your passwords, accounts, credit cards and more. You can trust that no one else will have access to your most important information.

Code Hero has Face Replace! (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE for a limited time.

Face Replace combines your faces with other photos to make unique and hilarious creations. Take new photos or mix and match your own from Facebook. Share your best faces with your friends!