SmartRedFilter
Study Smarter with Camera
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Turn your phone into a digital red study sheet! Point the camera at your textbook and red text disappears instantly.
Turn your smartphone into a digital red study sheet!
Point the camera at your textbook and red text disappears instantly, just like the classic red transparent sheet.
• Key features:
• Automatic detection and hiding of red text
• Tap the screen to show or hide answers
• Adjust filter intensity for your study material
• On-device processing — camera does not send data
• Works with books, notes and revision cards
• Pro:
• Hide other colours (orange, pink, green, blue)
• Save processed screenshots
• No adverts
Study smarter wherever you are.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Mitsuhiro Hashimoto, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 11 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 and 33 more
- English, Arabic, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Pro 1,99 €
- Provider
Mitsuhiro Hashimoto
- Mitsuhiro Hashimoto has not identified itself as a trader for this app. If you are a consumer in the European Economic Area, consumer rights do not apply to agreements between you and the provider.
- Copyright
- © 2026 Mitsuhiro Hashimoto