Color Board vs 昭和レトロ電卓
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Color Board
This utility app allows users to create vibrant color boards and display large, customizable text on their iPhone and iPad. It's ideal for presentations, events, or making bold statements with adjustable colors, backgrounds, and text effects.
- Create pure color boards
- Display big, customizable text
- Choose background and text colors
- Twinkle mode for flashing effects
- Adjustable font size and speed
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Color Board – Big Text & Pure Colors Color Board is a simple yet powerful tool designed for iPhone and iPad. Whether you need to display a big, clear message or create a vibrant color board, this app makes it easy and effective. With customizable colors, backgrounds, and text, you can instantly turn your device into a bold display. Perfect for presentations, events, or simply grabbing attention. Key Features: • Create pure color boards on iPhone and iPad • Display big, customizable text • Choose any background or text color • Twinkle mode for flashing color effects • Adjustable font size and speed settings Bring your message to life with Color Board – where text meets color in the simplest way.
昭和レトロ電卓
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昭和家電のような「蛍光表示管（VFD）」風の光り方と、カチカチ音で“触って気持ちいい”電卓です。 【主な機能】 四則演算・小数・％・符号反転 紙テープ履歴（端末内のみ保存） クリック音／ボタン振動のON/OFF ※広告（AdMob）を表示します。データは原則端末内で完結します。
Screenshots
Verdict
The clearest difference is in-app purchases: 昭和レトロ電卓 at none against Color Board's 1. 昭和レトロ電卓 also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.6). Color Board's advantage is update cadence (every 2 months vs every 5 months). 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. Color Board sells 1 one-off in-app purchase. 昭和レトロ電卓 asks for nothing beyond the download.
Color Board ships an update every 2 months, 昭和レトロ電卓 every 5 months. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.
| Parameter | Color Board | 昭和レトロ電卓 |
|---|---|---|
| Price | Free | Free |
| Rating | 1.6 (7 ratings) — better | — |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | 文睿 李 | Masaki Takahashi |
In-app purchases
Color Board
- Remove Ads$0.99
昭和レトロ電卓
No in-app purchases
