Here are the latest iPhone/iPod touch/iPod/iPad apps. You can find ’em at the Apple App Store (

Autodesk has announced TinkerBox, a free iOS game designed to spark interest in physics and mechanical engineering. The mechanical puzzles and challenging physics problems in the app require players to devise imaginative solutions, insert gadgets, assemble components, customize switches and test their inventions.

Jorg Piringer has released Gravity Tweets 1.0, a free twitter client for the iPhone, iPod touch and iPad. It combines a physics simulator with a minimalistic tweet display to create a novel tweet viewer. The app is not a full featured Twitter client but rather a program to view tweets in a relaxing way.

Derek Clark has introduced Ez Budget 1.0 for the iPhone and iPod touch. The US$4.99 app is designed to help you implement an envelope budgeting system. You allocate your income to the envelopes you want and then categorize your transactions as they come in. With Ez Budget, frugal shoppers can group envelopes into categories, manually import transactions, automatically import transactions using OFX, and more.

LiniQue has unveiled UniQPass Lite and UniQPass Pro, a productivity tool for the iPad and Android. It’s a $4.99 password and personal data manager equipped with instant capture capabilities and hosted on a cloud server so users can synchronize their data to access it from any of their multiple devices. UniQPass features military grade protection with 256-bit AES during storage and transmission of data, and more.

Intersog Mobile has launched Messenger Map for iPhone and Messenger Map for the iPad. This free app allows users to share their personal Google Maps and directions with their friends and family, all while on-the-go. Navigators can share where they are going and information how to get there with the click of a button via email, Facebook, or Twitter.

Bubanji has debuted SkyNumber HD 1.0, an iPad math game. In the $2.99, random numbers are falling from the sky with four sets of clouds holding them for a little while. Your task is to create the equation using the basic math calculations and these numbers, and reach the specified result.

Tenlin Studios has created Licking Letters for iOS, a $0.99 game where kids ages two to eight are challenged to spell words by having Hoppy the Frog catch the correct letters using his lightning-fast, long-range tongue. Letters float across the pond where Hoppy rests on a lily pad. Touching the screen causes his tongue to dart out, lick, and swallow any letter overhead until the required word is spelled. Players win Leapin’ Loot coins and play Bonus games between spelling rounds.

Holderness Media has developed iMelodica 1.0 for iPhone and iPod touch devices. It’s a $0.99 virtual melodica. Also known by the names “wind piano,” “melodyhorn,” etc., traditional melodicas are wind instruments that are played by blowing into the mouthpiece while pressing the keys. iMelodica is played by simply touching the keys.

Paper Corn Media has served up a free version of the iPhone/iPad game, Color Blaster. Color Blaster Free offers the first 15 levels of the full version.

Ivanovich says their iOS game Operation Wow will be available as a free download for a limited amount of time starting Saturday, April 30. It’s a new version of the game Operation Wolf that will give us the opportunity to enjoy the missions that marked a whole generation. This multi-touch shooter features a multi-touch fire system that allows players to kill enemies using all their fingers at once.

Mallow Technologies has updated ConvertX — a unit converter for the iPhone, iPod touch and iPad covering 684 units in 44 categories including currencies — to version 1.1 The $0.99 app features a search option to search any unit or category that needs conversion. Frequently used units can be added to favorites for quick access any time. Units and categories can be switched on or off.

TimeStream Software has announced Walt Disney World Guide 3.4, an update to its Notescast app for the iPhone and iPod touch. The $3.99 app showcases all of Walt Disney World Resort with over 300 pages of in-depth information and more than 750 photos.