Planet Lettra: A Word Building Playground

Download on the App Store Badge

Download on the App Store Badge

Bumping bubbles magically build words or invent your own to feed the silly creatures on Planet Lettra. This app is great for experimenting with word building and hearing what you've made.

Imagine a set of letter blocks that your child can arrange any way they want and hear what they've built, blocks that guide your child in building the most important sight words for reading fluency and give him or her lots of exposure to important letter blends, blocks that even form words all by themselves. That's Planet Lettra.

You can even go below the planet surface, into the belly of Lettra, to see the real words you've already fed to the Munchers, hear them read aloud individually or one after the other. Or rearrange the word bubbles to make silly sentences.

Whatever your child or student's age or reading ability, this app has plenty to discover and play with: green and purple Munchers that love to eat words, silly costumes, musical patterns, creatures with other special powers and more.

In classrooms and special ed settings, educators use Planet Lettra to scaffold student learning and development of phonemic awareness.


Studio Goojaji is a participant of the Know What's Inside(R) program for Family Friendly Developers. For more information, visit

What People Are Saying

5/5 "Best of the Best App": "Planet Lettra is an outstanding app that will help young readers develop an intuitive understanding of phonics and word analysis skills in a playful, encouraging environment."

Sandra Fleming, Best Apps For Kids

"Greg [of Studio Goojaji] gets that not all kids learn to read at the same time and so he has created a reading app that appeals to all ages. And, when I say ALL ages, I also mean adults.... It is very addictive (in a good way) and I find it meditative.... Another great thing about Planet Lettra is that there are no patronising cartoon characters saying “Good Job” which frankly, our son finds insulting."

Luminara, Living the Education Revolution

4 stars: "This app is great for experimenting with word building and hearing what you have made. The app supports fantastic graphics and a unique playing experience."

Educational App Store

Best Apps For Kids: Best of the Best 5 star review Children's Technology Review Editor's Choice For Excellence In Design 2016 (Grade 86\%) Educational App Store Certified Badge: 4 stars Learn what's inside Planet Lettra.

Click here for the Planet Lettra press kit (screen shots, hi-res app icon).