The Mesozoic

135creatures, each one painted

5ages, from the Permian to after the dinosaurs

10games, and 9 kinds of quiz

0ads, accounts or tracking

Every creature, painted

From giant sauropods to feathered hunters

Each creature has its own painting, its size next to yours, where its fossils were found on a map of the ancient Earth, and a story to play, read aloud. All of it is in the app, so it works on a plane or in a tent.

Fun facts, checked against museums and papers
Maps of the continents as they were in each age
Size compare, timelines and famous fossils

Hatch a mystery egg

Who's inside? Look for clues

Every few hours your egg gives a clue about who's inside. Guess who's inside, watch it crack open, and give your hatchling a name. Rarer eggs take longer, and twins can surprise you.

Eggs painted for every kind of dinosaur and pterosaur
Volcanic ash, earned by learning, warms an egg so it hatches sooner
Badges bring reward eggs

Collect cards

A card for every creature, and rare full-art ones

Read about a creature to get its card, win it in a quiz, then hatch it for a glowing one. Cards come in six art styles, from crayon to pixel art, with stickers to decorate them. Full-art cards are the rarest of all: their paintings fill the whole card.

Meet Tiko

Ask Tiko the Troodon anything

Tiko knows every creature in the app. Ask a question, or chat with a dinosaur itself: it answers in its own voice, from what scientists know (and what they still argue about). The chat runs on Apple's on-device model, so nothing you type leaves your iPhone.

Did T. rex have feathers?

Maybe a few when it was small! The big adults had scaly skin on most of their body, from the fossil skin we've found. Want to see who did have feathers?

Play

Play what you've learned

Nine kinds of quiz, from "Who's that shadow?" to myth busters and a speed round, and ten games: Dino Duel, Card Battle, a fossil dig, a pterosaur glide over the sea, jigsaws and more, alone or with someone next to you. Quizzes and games earn volcanic ash for your egg.

Compare any two creatures, or a creature with you
Find fossil sites and the museums that show them

Compare: Tyrannosaurus and Triceratops side by side

Deep time

Five ages, one story

Walk from the Permian, before the dinosaurs, through the Triassic, Jurassic and Cretaceous, to what came after. Each age has its painting, its map and its story, read aloud by a recorded voice, with bedtime stories of your own to make.

PermianBefore the dinosaurs

TriassicThe dawn of the dinosaurs

JurassicThe age of giants

CretaceousFeathers, horns and flowers

PaleogeneAfter the dinosaurs

Seasons

Something new every month

Each season brings a new path of rewards: stickers, card looks, eggs, app icons and a full-art card to finish. Play on the free path, or unlock the whole season with the season pass.

For families

Made to be trusted

No ads, no tracking

Nothing is sold or shared for advertising. Anonymous usage notes help us improve the app, and one switch turns them off.

Grown-ups decide

The app asks the reader's age once. Younger readers get a grown-up's question before purchases, links and sharing.

Works offline

Every creature, painting and fact is in the app. Chats and stories stay on the device. Read the privacy policy.