ThumbThru
Check the content of any book
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Scan any book and instantly see what's inside — language, violence, romance, and mature themes — checked against your family's preferences and each reader's age.
ThumbThru helps you know what's actually inside a book before you (or someone you care about) reads it.
Scan any book's ISBN barcode, or search by title or author, and ThumbThru gives you a clear, honest content guide including language, violence, romantic content, substances, and the heavier emotional themes a book might explore. Not a rating. Not a recommendation. Just the information
you need to decide if it's right for you.
HOW IT WORKS
- Scan the barcode on the back of any book or search the title
- See an at-a-glance breakdown of content categories
- Tap any category for the specific details
- Set your content preferences once, and ThumbThru flags anything in a book that falls outside them
- Change your content preferences whenever you choose
YOUR PREFERENCES, YOUR CALL
ThumbThru doesn't decide what's appropriate—you do. Set the content categories that matter to you. When you scan a book,
anything that crosses your line gets flagged. You read the details and decide whether it's a fit for you.
This works whether you're choosing for yourself, vetting a book your kid wants to read, or building a reading list for your book club. Same tool, same honest information.
UPLOAD A READING LIST
Got a summer reading list from school? A book fair flyer? A list of recommendations from a friend? Snap a photo or paste the titles in. ThumbThru identifies the books and gives you content guides for the whole list at once.
ALSO IN THE APP
- Save books for later (bookmarks)
- Track what you've read and what you liked
- Add family members and their ages to ThumbThru on their behalf
- Connect with a partner library for unlimited scans, free
WHY WE BUILT IT
You shouldn't have to get into the story before you know what you're getting into. You shouldn't have to guess based on the cover. You shouldn’t have to slog through endless reviews for hours to get the information you want. ThumbThru gives you
the same kind of thumb-through you'd do at a bookstore, in a few seconds, for any book.
GET STARTED
Open the app, sign in with Google, scan a book. Your free standard account gives you a set of monthly scans, but you can also connect with a partner library for unlimited scans completely free!
Questions, suggestions, or a book that didn't get assessed right? Tap "Report an Issue" in the app—we read everything.
Terms of Use (EULA): https://thumbthru.com/terms
Privacy Policy: https://thumbthru.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, ThumbThru 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ThumbThru LLC
- Size
- 56.9 MB
- Category
- Books
- Compatibility
Requires iOS 15.5 or later.
- iPhone
Requires iOS 15.5 or later. - iPad
Requires iPadOS 15.5 or later. - iPod touch
Requires iOS 15.5 or later. - Mac
Requires macOS 12.4 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+
- In-App Purchases
Yes
- ThumbThru Premium — Annual $39.99
- ThumbThru Premium — Monthly $4.99
- Copyright
- © 2026 ThumbThru LLC
