COLON vs Transparent red sheet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
COLON
A minimalist digital clock app that focuses on displaying the time in a large, clear format. Customize colors, fonts, and display options to suit your preferences. It offers essential features without unnecessary complexity.
- Large time display
- Customizable background, text color, and font
- 200 font options
- Show/hide seconds
- Minimalist design
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シンプル is ベスト！ 時計以外何もない、時間を大きく表示するだけのアプリ。 位置情報に基づく天候表示、日付表示、アラーム機能、タイマー機能、ウィジェット等々・・・ 最近の時計アプリはこれらの機能がスタンダードになりつつあります。しかし、 「時計アプリにそこまで求めてないよ！時間を大画面で確認できればそれで良いんだよ！」 という方もまた、いらっしゃると思います。 そんな方ためのシンプルでミニマルな時計アプリがCOLONです。 【機能・特徴】 ・時計の背景色、文字色、フォントを自由にカスタマイズできます。 ・フォントは200種類！ ・秒数の表示/非表示を自由に選択できます。 ・課金、広告一切なし、完全無料で使えます。
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: COLON at none against Transparent red sheet's shown. Transparent red sheet's advantage is update cadence (every 2 weeks vs every 29 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.
COLON ships an update every 29 months, Transparent red sheet every 2 weeks. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.
| Parameter | COLON | Transparent red sheet |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 87.5% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 29 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.8.3 |
| Further details — not scored | ||
| Size | 8 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Toshihide Miyake | Hideaki Uchikoshi |
In-app purchases
COLON
No in-app purchases
Transparent red sheet
No in-app purchases
Questions
Is COLON free?
Is Transparent red sheet free?
Do COLON or Transparent red sheet have ads?
Which is updated more often, COLON or Transparent red sheet?
Other comparisons
