Clopass vs Red Sheet Camera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clopass
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【KEY FEATURES】 ■ Blanks that don't give away answer length ■ Every hidden answer is replaced with a blank of the same length, regardless of how many characters it contains. You can't guess from the length of the underline, so you can check whether you truly remember the answer. ■ Color-code with red and green pens ■ Simply drag over the text you want to remember to turn it into a blank. Use red for key terms and green for supporting details, or choose a system that works for you. Show or hide all answers of either color to focus on what you want to review. ■ Hints that help you recall, one character at a time ■ Can't remember an answer? Each tap reveals just one more character. Get a small nudge to help you recall it yourself, without revealing the whole answer at once. ■ Add images to bring your notes to life ■ Insert images into your notes. Keep diagrams, maps, and photos alongside your text to organize what you're learning. Note: Only text can be turned into blanks. Hiding parts of an image is not supported. ■ Two ways to test yourself ■ Choose & Practice: Pick the material you want to review, then answer paragraph-based questions in random order. Ideal for focusing on a particular topic. Target Weak Spots: Get questions selected automatically based on your test results. See the reason behind each selection, such as your accuracy or review timing. In either mode, you can open a question's source note from your results and save a quick memo about what you learned. ■ Pick up where you left off ■ Clopass saves your position in the last note you opened, along with which answers were visible. Even after closing the app, you can resume studying right where you stopped. ■ Study offline and keep your notes organized ■ Create and edit notes, study, and take tests offline. Duplicate, move, and reorder folders and notes to organize your material your way. ■ Share your notes ■ Send a share link to friends or study partners. You can also post links on social media to share your own notes with a wider audience. ■ Track your study habits and set reminders ■ See your daily study activity on a calendar. Choose the days and times you'd like reminders, and build a routine that fits your schedule. ■ Encrypted backups and data recovery ■ Enable automatic backups to encrypt your data and save it to the cloud when you're online. Use your recovery code to restore your data after switching devices or reinstalling the app. ■ No account required ■ No sign-up needed. Download Clopass and start learning right away.
Red Sheet Camera
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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. PRO (ONE-TIME PURCHASE) Scanning, hiding and studying with the red sheet stay free, always. With Pro: - The parts you could not recall are remembered - Next time, review only those parts - See how many rounds you have done and how much you recalled - No ads One payment. Restore it for free after changing or reinstalling your device.
Screenshots
Verdict
The clearest difference is in-app purchases: Clopass at none against Red Sheet Camera's 1. Clopass also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). Red Sheet Camera's advantage is update cadence (weekly vs every 3 weeks). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Red Sheet Camera sells 1 one-off in-app purchase. Clopass asks for nothing beyond the download.
Clopass ships an update every 3 weeks, Red Sheet Camera weekly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | Clopass | Red Sheet Camera |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Aika Ooka | RAINBOW TREE LLC |
In-app purchases
Clopass
No in-app purchases
Red Sheet Camera
- 広告を削除$2.99
Questions
Is Clopass free?
Is Red Sheet Camera free?
Do Clopass or Red Sheet Camera have ads?
Which is updated more often, Clopass or Red Sheet Camera?
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