Apps That Went Free on 2020-09-30

iPhone

iPad

Taculator Graphing Calculator

Di Venisco UG (haftungsbeschrankt)

Turn your iPhone or iPad into an advanced calculator with Taculator. TODAY ONLY: Receive 2 months of Taculator Pro free of charge! After launching the app and choosing your favorite colors, enter the promo code “APPADVICE”. To do so, press and hold the “alpha” key and enter the letters. For example, the “math” key will enter the letter “A” when alpha lock is on. Tap “enter” to activate the promo code.

Students and teachers.

FREE ($7.99) For a limited time FREE ($7.99) For a limited time

Why we picked this?

Taculator is even better than a actual calculator. It’s faster, has a better display, and is always with you wherever you go. Taculator covers pre-algebra, algebra 1 and 2, pre-calculus, calculus, and statistics, and includes every command and function you’ll ever need. You’re able to plot graphs in a snap, perform matrix arithmetic operations, execute statistical tests, and much more. An integrated catalog and help section provides assistance with syntax, possible error messages, and examples.

You frequently deal with complex calculations.

You simply don’t need all of the excess functionality.

iPhone

iPad

Animated 3D Knots

Sergey Burlakov

Learn how to tie more than 55 essential knots with this reference app.

Whether you fish, climb, or just need to get some work done around the house, you’ll find this app coming in handy at some point.

$0.99 $0.99

Why we picked this?

You’re able to browse through the knots by category or search for something specific. Each knot includes a difficulty rating, a description, and step-by-step instructions accompanied by 3D animations. You’re able to share knots via Facebook or Twitter, and leave a comment and a rating. The app also includes the ability to favorite knots and adjust the animation speed.

You can’t tie more than a basic knot. The 3D animations will help ensure you’ll never have another knot come undone.

You’re a master knot tier who earned every scout badge.

iPhone

iPad

Animated 3D Origami

Sergey Burlakov

Learn how to craft your own origami with Animated 3D Origami.

Children and adults.

$0.99 $0.99

Why we picked this?

Animated 3D Origami will delight anyone who gives it a try. It includes more than 120 traditional origami patterns to choose from, covering everything from animals and insects to clothes and containers. Each pattern includes step-by-step written instructions and animations to follow.

You enjoy paper folding and want to work on your fine motor skills.

You have no interest in the art of origami.