# Red Sheet Camera: Study Notes — Hide answers and memorize fast

> Hide answers and memorize fast (iPhone/iPad app by RAINBOW TREE LLC.)

- Source: https://appshunter.io/ios/app/red-sheet-camera-study-notes/id6790114724 (this page in markdown: same URL + `.md`)
- Developer: [RAINBOW TREE LLC](https://appshunter.io/developer/1619997282)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 16 MB
- Languages: American English, Japanese
- Released: 2026-07-13
- Data updated: 2026-09-04
- User reviews in markdown: https://appshunter.io/ios/app/red-sheet-camera-study-notes/id6790114724/reviews.md

## What is Red Sheet Camera?

Turn your everyday notes into flashcards — just by taking a photo.

Red Sheet Camera hides the answers you wrote in red or orange pen (and green highlighter), so you can quiz yourself just like a physical red memorization sheet.

HOW IT WORKS — 3 EASY STEPS
1. Scan your notes or textbook (auto-straightened)
2. Red-pen answers get hidden by the sheet
3. Tap or slide the sheet to reveal the answers

FEATURES
- A real red sheet, digitized
The same idea as a physical red sheet: red and orange pen disappear, while black and blue text stays readable.

- Auto-Hide
Tap "Auto-Hide" to detect red/orange pen and green highlighter and cover them automatically. Fine-tune the hidden areas by tap or drag.

- Organize by subject
Keep a separate notebook for each subject — biology, history, English, math and more.

- Fully on-device
Everything works offline, and your photos stay on your device.

Perfect for exam prep, vocabulary, dates, formulas and anything you need to memorize.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 広告を削除 | $2.99 | one-time |



## Version history (last 5 releases)

### 1.0.7 — 2026-08-28

Thank you for using our app.

In this update we reviewed the app as a whole and refined the experience.

If you notice anything, please let us know from Contact inside the app.

### 1.0.6 — 2026-08-19

Added “Edit Larger”.
• Mark hidden areas with your note filling the whole screen, from Sheet Settings
• Pinch with two fingers to zoom in and mark even small handwriting
• You can now pinch to zoom on the study screen too
• Added “Undo” for when you mark the wrong spot

### 1.0.5 — 2026-08-01

• Refreshed the app icon and in-app illustrations for a cleaner, clearer look.
• Minor bug fixes and visual improvements.

### 1.0.4 — 2026-07-24

Refreshed the app icon and mascot design.

### 1.0.3 — 2026-07-21

• Refreshed the mascot, app icon and overall visual design
• Clearer first-time onboarding guide
• Red-pen answers are now hidden far more reliably by the red sheet
• The red sheet can now be used vertically, and you can change its thickness
• Switch freely between tap-to-reveal and the sliding red sheet
• Rotate your photos
• Added Help & FAQ and Contact us in Settings

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All apps by RAINBOW TREE LLC: https://appshunter.io/developer/1619997282

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*