Now in early access

The library you share with people you trust.

Shelve the books you own and love. Then hop through your friends, and their friends, to see what they thought and borrow your next read from someone you know.

Coming soon toGoogle Play

Android first. iOS and a web version are on the way.

9:41

Grasshopper RP

Your shelves

5 owned · 2 lent out · 2 borrowed

Search your library & network

Owned 5 Read 6 Want 1

Available Lent out Borrowing All

Project Hail Mary

Andy Weir

Project Hail Mary

Andy Weir

Lent · Maya

Piranesi

Susanna Clarke

Piranesi

Susanna Clarke

Lent · Leo

The Overstory

Richard Powers

The Overstory

Richard Powers

#bookclub

Klara and the Sun

Kazuo Ishiguro

Klara and the Sun

Kazuo Ishiguro

Borrowing

Library Graph Discover Friends You

How it works

Your next book is one or two hops away.

Grasshopper turns your friend graph into a living library. Every connection is a hop, and every hop opens up shelves, opinions, and books you can actually get your hands on.

Shelve your books

Scan a cover or search a title to add the books you own and have read. Tag them, rate them, and keep anything private with a tap.

Hop through friends

Connect with people you trust. Their shelves, and their friends' shelves, come into reach, measured in hops from you.

Borrow what you find

See who in your network owns the book, how many hops away they are, and ask to borrow it, straight from someone you know.

Features

Your bookshelf meets your group chat.

All the reading-tracker basics, built around the one thing that actually changes what you read next: the people you trust.

The living graph

Watch your reading network come alive. Friends, friends of friends, and the books rippling out between them. Pan, zoom, and reach further with every hop.

Reviews from your circle

Skip the noise of a million strangers. See what your friends, and the people they trust, actually thought, with the hop that connects you to each take.

Borrow & lend

Track what you've lent out and to whom, and find the closest available copy across your whole network before you buy.

Private by default

No AI, no algorithm deciding for you. Every book and every review can stay private. You choose exactly what your network sees.

FAQ

Good questions.

What exactly is a “hop”?

A hop is one step across your friend graph. A direct friend is one hop away; their friends are two hops. Grasshopper measures every book, owner, and review by how many hops it sits from you, so you always know how close a recommendation really is.

Do I have to make my whole library public?

Never. Grasshopper is private-first: every book and every review can be hidden with a tap. You decide what your network sees, shelf by shelf, and you can keep things entirely to yourself.

How does borrowing work?

Search any title and Grasshopper looks across your network for a copy. You'll see who owns it, how many hops away they are, and whether it's available, then you can ask to borrow it directly. No marketplace, no strangers, just people you're connected to.

Is there any AI deciding what I read?

No. There's no recommendation algorithm and no AI features. Discovery comes from real people you trust and the graph that connects you. Nothing more.

Which devices does it run on?

Grasshopper runs on Android phones and tablets. An iOS app and a web version aren't available yet. They're on the way.