Calculator COLORS vs Calta
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator COLORS
This utility app offers a straightforward calculator with a customizable flat design. Users can select from five color themes and choose a preferred function key from options like percentage or tax. It also features calculation history and clipboard integration for easy data transfer.
- Customizable flat design colors
- Choice of function keys (% , TAX, √ ̄, right shift)
- Calculation history
- Copy result to clipboard
- Optimal layout for fast calculations
- 16-digit display
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Dress up your Calc App with Colors. Choose one of 5 flat design colors — purple, blue, green, orange or pink Calculator COLORS is a simple calculator. But it has a perfect design with a great layout for fast and easy calculations. ・Function Keys You can choose from [ % ], [ TAX ], [ √ ̄ ] or [ right shift ] key. ・Calculation History ・The result is copied to clipboard. It can be pasted in other application. ・Simple Flat UI design. ・iPhone6,iPhone6 Plus and iPad perfect compatibles. ・Optimal layout [ 00 ] Key , Big Addition Key ..etc. ・16-digits Display ・Tap Sound Feedback
Calta
This calculator app offers advanced features like equation display, calculation history, and redo/undo functionality for easier use. Customize backgrounds and button shapes, and perform tax calculations with adjustable rates. It supports up to 20 digits and respects order of operations.
- Equation display
- Calculation history
- Redo and Undo functions
- Customizable background
- Customizable button shape
- Tax calculation
- Order of operations support
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Caltaでは、履歴の再利用・RedoやUndoなど独自の機能を持っていますが、使い方は簡単でこれらの機能は電卓をより便利にしてくれます。 Caltaには四則演算に加え様々な優れた機能があります。 ・数式が表示される ・履歴リスト ・好きな背景に変更 ・ボタンの形状を変更 ・税計算ができる ・演算の優先順位を考慮:例)「1 - 2 × 3 = -5」 ・最大で20桁の有効桁数 ・数式のRedo, Undo 【履歴リスト】 「時計マークの履歴ボタン」を押すことで、過去の計算を閲覧することができます。それぞれの計算をタップすることで「数式の答え」をペーストできます。また、長押しすることで「数式のペースト」「名前の変更」ができます。 【背景の変更】 「歯車マークの設定ボタン」「背景を変更」からフォトライブラリの画像から好きな画像を選択することができます。また、一部分のみをくり抜くことができます。 【ボタンの形状を変更】 「歯車マークの設定ボタン」「ボタンの形状を四角にする」からボタンの形状を丸と四角に切り替えることができます 【税計算】 「税」ボタンを押すことで「税込」、長押しすることで「税抜」の計算ができます。また、設定から税率を8%と10%に切り替えられます。 【数式のRedo, Undo】 左右の矢印を押すことで、数式を一個前の状態に戻したり進めたりすることができます。
Screenshots
Verdict
The clearest difference is review sentiment: Calta at 100% against Calculator COLORS's 70%. Calta also leads on update cadence (every 3 days vs every 2 months). On price, ads, in-app purchases and monetization model 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.
Calculator COLORS ships an update every 2 months, Calta every 3 days. The most recent releases landed on August 16, 2026 and June 4, 2026 respectively.
| Parameter | Calculator COLORS | Calta |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 70.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 5 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | newforestar co,.ltd | Hiroki Oka |
Customer experience
Calculator COLORS
Calta
In-app purchases
Calculator COLORS
No in-app purchases
Calta
No in-app purchases









