Comparison

Calta vs 電卓

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Equation display
  • Calculation history
  • Redo and Undo functions
  • Customizable background
  • Customizable button shape
  • Tax calculation
  • Order of operations support
Features
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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。

About

電卓

Features
Read full description

“Calculator - No Ads on Calculator” is a simple and easy-to-use calculator app designed to help you stay focused while calculating. No ads are displayed on the calculator screen, so you can concentrate on the numbers and controls without distractions. In addition to everyday calculations, the app includes useful features such as tax-inclusive and tax-exclusive calculations, discount calculations, and calculation history for quickly reviewing previous results. You can customize the calculator with your favorite photos as wallpapers and combine them with theme colors and light or dark mode. Your wallpaper, theme color, and appearance settings can be saved together as a “Style.” Create multiple styles for different moods or purposes and easily switch between them whenever you like. Main Features • Basic arithmetic operations • Calculation history • Memory calculations • Tax-inclusive and tax-exclusive calculations • Discount calculations • Light mode and dark mode • Custom photo wallpapers • Customizable theme colors • Save wallpapers, theme colors, and appearance settings as Styles • Save up to 2 Styles for free • Expand the Style limit to 8 with an in-app purchase • In-app purchase to remove ads Use it as a simple everyday calculator, or personalize it with your favorite photos and colors to make it your own. Ads may appear on some screens, such as the Settings screen. No ads are displayed on the calculator screen.

Screenshots

Calta4 screens
電卓4 screens

Verdict

The call

The clearest difference is in-app purchases: Calta at none against 電卓's 3. Calta also leads on iOS requirement (11.0 vs 17.0). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 電卓 sells 3 one-off in-app purchases. Calta asks for nothing beyond the download.

UpkeepUpdate frequency

Calta ships an update every 3 days, 電卓 every 6 days. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

Scorecard2 real differences · 6 level
Calta versus 電卓: the parameters behind the verdict, then further details
ParameterCalta電卓
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 3 days — betterEvery 6 days
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPad
Requires iOS11.0 — better17.0
Further details — not scored
Size23 MB8 MB
Age rating4+4+
DeveloperHiroki OkaTakahiro Kimura

In-app purchases

None

Calta

No in-app purchases

3 purchases

電卓

One-time3
  • Support the Developer$0.99
  • Remove Ads$0.99
  • Unlock More Styles$1.99

Questions

Is Calta free?
Calta is free to download, with no in-app purchases.
Is 電卓 free?
電卓 is free to download, with in-app purchases available.
Do Calta or 電卓 have ads?
Both Calta and 電卓 show ads.
Which is updated more often, Calta or 電卓?
Calta ships an update every 3 days, and 電卓 every 6 days. Most recently, Calta was updated on October 29, 2026 and 電卓 on November 1, 2026.

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