CHALLENGE
November: 30 Days of Focus
Start it from Home, see all 30 days at a glance, and get a note after days 7, 14, 21 and 30. It stays on your iPhone.
Open Book: Content Blocker
Screen Time & Website Filter
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Doing NNN? Start the 30-day challenge. Keep blocking on and watch your kept days add up. Your blocking choices and activity log stay on your iPhone.
Open Book blocks adult content and the apps that pull you off track, using Apple's built-in Screen Time controls. You set it up, you manage it, and your choices stay on your iPhone.
30-DAY CHALLENGE
Start a 30-day challenge from Home. Every day that blocking stays on with no pause counts as a kept day. See all 30 days at a glance, get a short note after days 7, 14, 21 and 30, and start over whenever you want. Your challenge is kept on your iPhone.
NATIVE BLOCKING. NO VPN.
Open Book uses Apple's Screen Time framework, not a VPN or traffic inspection. When blocking is on, Safari's adult-content filter turns on automatically. Use Apple's own picker to choose apps, app categories and websites to block.
KEEP THE APPS YOU NEED
Blocking a whole category? Add app exceptions so a work chat app or another app you rely on keeps working.
SHORT PAUSES ON YOUR TERMS
Need a break? Pause blocking for 15, 30 or 60 minutes. Blocking is scheduled to resume when the pause ends, and you can resume it sooner. iOS may delay the resume while your phone is idle.
YOUR ACTIVITY, PRIVATELY
The Activity tab lists when blocking started or stopped and when pauses began and ended. Filter it by type. It records event types and times only, never websites, app names or browsing history.
WEEKLY RECAP
Turn on the weekly recap from Activity to get a short notification each Sunday evening. It counts your pauses for the week and the days you had none. The recap is built on your iPhone from your Activity log.
PRIVATE BY DESIGN
Your blocking choices, activity log, challenge and recaps stay on your device. Open Book never sees your browsing and doesn't share your activity with anyone. To improve the app, it sends a few anonymous usage events, such as starting or finishing a challenge. They never include websites, app names or Screen Time data, and they aren't linked to your account. A minimal account, created without an email or password, supports purchase restore and account deletion. You can delete it anytime in Settings.
YOU'RE IN CONTROL
Stop blocking whenever you want. You can also turn off Screen Time access in iPhone Settings at any time. Open Book is for managing your own iPhone. It is not a parental-monitoring tool.
Existing subscribers can restore or manage their subscription in Settings > Account & subscription.
Privacy Policy: https://useopenbook.com/privacy
Terms of Use: https://useopenbook.com/terms
Support: https://useopenbook.com/support
Events
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Tap Open on the 30-day challenge's App Store event, and Open Book takes you straight to the challenge.
The developer, Reno Labs, 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
- Identifiers
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
- Reno Labs, LLC
- Size
- 10.7 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 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 Reno Labs LLC