Category: Website Design Tool

Industries: Marketing, Business, Education, Communication

Principle is powered by Core Animation, the hardware-accelerated animation engine that iOS and macOS are built on. It also includes the Mac features you love: Full-screen mode, a Retina interface, and Auto Save — so you’ll feel right at home.

20M+ Downloads

#1 in Magazines & Newspapers

Speechify is the #1 audio reader in the world. Get through books, docs, articles, PDFs, email – anything

you read – faster.

Sir Richard Branson

Speechify is absolutely brilliant. Growing up with dyslexia this would have made a big difference. I’m so glad to have it today.

Sir Richard Branson


Principle licenses are $129 for each computer you want to use it on
Licenses get all updates for a year, after that you can renew your license to continue getting updates
Licenses can be renewed for $99 per computer
Pros Cons
Testing out interactions as a designer It is for Mac users only and not for Windows users
Doing user testing Achieving more complex animations can be tricky if not impossible
The users they feel like they're using a real production app It would be great if there would be more straightforward features for these kind of effects.
The integration is seamless and allows me to work quickly and efficiently to take my mock-ups to prototypes.


Atlanta, Georgia, United States

Principle reviews

"Principle is by far my favorite prototyping tool"

- Lucy Guo Designer, Snapchat

"I’m seriously in love with Principle, it’s even easier than I expected."

- Alan Roy Design Consultant

"This tool is amazing, very well done."

- Patrick Wong Designer, Lyft

What is Speechify?

Speechify is one of the most popular audio tools in the world. Our Google Chrome extension, web app, iOS app, and Android app help anyone listen to content at any speed they want. You can also listen to content in over 30 different voices or languages.

How can Speechify turn anything into an audiobook?

Speechify provides anyone with an audio play button that they can add on top of their content to turn it into an audiobook. With the Speechify app on iOS and Android, anyone can take this information on the go.

Learn more about text to speech online, for iOS, Mac, Android, and Chrome Extension.

Speechify is the #1 audio reader in the world

Get through books, docs, articles, PDFs, email – anything you read – faster.


20M+ downloads

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