Critterbook
Bug Identifier & Field Guide
Free · Designed for iPad. Not verified for macOS.
A painted field guide for families. Point the Bug Lens at a critter, see who it is, and press it into your Journal. Free, private, all on your phone.
Critterbook is a painted field guide to the creatures your family actually meets: the isopods in the terrarium, the orb weaver by the porch light, the frog at the pond.
Every one of its 36 creatures is a hand-finished painted plate on warm paper. Snakes, poison frogs, isopods, and the backyard visitors kids find on their own. Tap a plate for its vitals, its story, and the kind of fact a child repeats at dinner.
POINT THE BUG LENS
Found something? Look at it through the Bug Lens. Identification happens entirely on your phone; the photo never leaves the device. When Critterbook recognizes a creature from its guide, it suggests a match honestly ("Looks like a ladybug!") and never gives a confident wrong answer.
FILL YOUR JOURNAL
Every creature you find gets pressed into your Journal, a collection wall that starts as 36 ghosts and fills with color as your family finds them. Two ways to collect: scan one with the Bug Lens, or mark it seen in person.
NOMINATE NEW CREATURES
Found something the guide doesn't know? Nominate it. New plates are painted and added to the guide over time.
MADE FOR FAMILIES
- Free. No ads, no accounts, no purchases.
- Private by design: everything happens on your device.
- Works offline, in the yard, at the park, off the grid.
Critterbook is painted, not photographed. A field journal your family fills together.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Behind-the-scenes improvements.
The developer, Altai Ventures LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Altai Ventures LLC
- Size
- 269.9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Brian Le Vu