ZN vs Transparent red sheet
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ZN
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ZN-Light App is used to control Bluetooth lights. You can set the light switch, color, brightness, mode, etc.
Transparent red sheet
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This app allows user to take a picture of areas written in red and make only the red text less visible. After taking a picture with the camera, the app saves two images: the original image and an image with the red text less visible. Even if user don't have a red transparent sheet, user can still memorize and study by hiding the parts highlighted in red pen.
Screenshots
Verdict
The clearest difference is ads: ZN at none against Transparent red sheet's shown. ZN also leads on iOS requirement (11.0 vs 15.8.3). Transparent red sheet's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ZN ships an update every 6 weeks, Transparent red sheet every 2 weeks. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.
| Parameter | ZN | Transparent red sheet |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 2 weeks โ better |
| Ads | No โ better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 โ better | 15.8.3 |
| Further details โ not scored | ||
| Size | 28 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | ้ฃ้ฃ ๆจ | Hideaki Uchikoshi |
In-app purchases
ZN
No in-app purchases
Transparent red sheet
No in-app purchases
Questions
Is ZN free?
Is Transparent red sheet free?
Do ZN or Transparent red sheet have ads?
Which is updated more often, ZN or Transparent red sheet?
Other comparisons
