This Weekend in the App Store: the best free apps, new apps and app updates

Here are some of the best free apps, app updates and new apps that have landed in the App Store recently. All app prices are USD and subject to change. Some deals may expire quickly, so grab them while you can.

Apps Now Free

Operation Math - Addition, Subtraction, Multiplication and Division for Kids [iPad; Now free, down from $2.99] Complete your mission by solving the equations that block your escape and earn all the uniforms and watches of a seasoned Base 10 spy.

Operation Math Pocket - Addition, Subtraction, Multiplication and Division for Kids [iPhone; Now free, down from $2.99] Complete your mission by solving the equations that block your escape and earn all the uniforms and watches of a seasoned Base 10 spy.

Weather glance - daily live forecast [iOS Universal; Now free, down from $1.99] Weather glance is an intuitive and detailed weather app. It shows you temperature by colour so you can find out all the weather conditions and trends at a quick glance.

Farmscapes HD (Premium) [iPad; Now free, down from $6.99] Help Joe restore his ranch in the brand new game by Playrix! Earn money by selling fresh veggies, juicy fruits, eggs, flowers and honey from his old farm to the townspeople, and spend it on restoring the landholding back to its grandeur and beauty.

Sago Mini Ocean Swimmer [iOS Universal; Now free, down from $2.99] Laugh out loud as you explore a magical underwater world with Fins the fish.

Timeline 3D - Create and present timelines [iOS Universal; Now free, down from $9.99] Create and present timeline charts for school, work, or home.

Nuts!: Infinite Forest Run [iOS Universal; Now free, down from $0.99] Help Jake, your nimble squirrel hero and his squirrel friend Miranda dodge branches and climb to new heights on the majestic Infinitree!

Picture Collage Maker 3 [OS X; Now free, down from $19.99] Picture Collage Maker 3 is a powerful and easy-to-use photo collage creator to create photo collages, scrapbooks, greeting cards, photo calendars, photo albums and posters quickly.

New and Notable Apps

dEXTRIS [iOS Universal; Free] AVOID THE SPIKES! Like hard games? Dodge spikes at super speed using a cool new "magnetic" control scheme.

Lumena [iOS Universal; $1.99] Lumena is a no-nonsense rhythm game with an original electronic soundtrack from Modbom.

Noisli [iOS Universal; $0.99] The Official App of Noisli.com - The background noise and color generator for working and relaxing.

LEGO Marvel Super Heroes [OS X; $29.99] Fly, smash and swing your way through a side-splitting LEGO adventure as over 100 classic Marvel characters.

Fishdom 3 [OS X; Free] Enjoy the ultimate Fishdom experience - now all your fish are in 3D and have their own personality. Feed them, play with them, and watch them interact with each other.

feedly. Read more, know more. [OS X; Free] The feedly app gathers the content of your favorite websites, blogs, Youtube channels and RSS feeds in one place.

Updates you don't want to miss

TuneIn Radio Pro [iOS Universal; $3.99] TuneIn is real radio. Discover, follow and listen to what's most important to you from the world's largest collection of sports, news, music and talk stations. Version 6.1 brings the following changes:

• Updated look and feel

• TuneIn suggests stations, shows and categories to follow based on your interests

• Your past favorites are now the stations/shows you are following. You can find this in your Profile tab.

• Your personalized feed brings you live updates from the stations, shows and people you follow

• Use the Explore page to discover great new stations and shows to follow

• The TuneIn Echo lets you share what you're listening to with your friends and followers

• Create your own profile so that your friends can follow you and what you are following on TuneIn.

Vimeo [iOS Universal; free] Vimeo is the home for your videos. It makes them look great, easy to share, and simple to save. Version 4.1.00 brings the following changes:

• The Vimeo-est app ever: all-new look and feel with streamlined menus, more lightweight design, and a friendlier vibe.

• A new home for you: quick access to your videos, feed, likes, and Watch Later queue.

• View and edit info in a snap: tap a video to see its description and metadata; share, like, and add comments more easily.

• More personalized profiles: there's a sweet new design, plus check out what videos people like, who they follow, and who follows them.

• Speed demon: Faster video playback for all!

Stackables for iPhone and For iPad [iPhone or iPad; $0.99] Stackables is the most advanced and comprehensive effects layering and blending app. Version 1.5 brings the following changes:

• To celebrate the official launch of our Instagram feed, we have added ELEMENTAL textures pack. Six nature-inspired textures that you can unlock by following us on Instagram.

• Added "Spring Forest" preset formula, which makes good use of the newly added ELEMENTAL textures.

• We have many outstanding user-created formulas to share with you - 20 in total! Hope you enjoy experimenting with them as much as we did!

• Added a Grain tool with black and white variations under Adjustments.

Union [iOS Universal; $1.99] Combine your photos in infinite ways to create mind-blowing scenery, artistic framing, and surreal images. Version 1.0.2 brings the following changes:

• Improvements to help pages and tips

• Fixes for undo tool

• Performance improvements

• Bug fixes

Paw HTTP Client [OS X; $19.99] Easily craft your HTTP requests, try them, archive them. Version 2.0.6 brings the following changes:

• Paw now remembers exactly where you left each document

• New JSON pretty-printer

• Added an alert when changing the Request Body Type will be destructive

• Improved the Preferences window

• The Response Status Code and name of the request are now displayed in the system notification

• Various HTTP Improvements

• Improvements in Dynamic Values

• Improvements in Code Generation