Comparison

Calc+α vs Calta

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

Head to head
About

Calc+α

This utility app simplifies daily calculations with an intuitive interface. It features a history of your calculations, allows for easy editing and recalculation, and provides convenient tax and division functions. Organize your finances and avoid manual note-taking.

Highlights
  • Calculation history and review
  • Edit past calculations and recalculate
  • Tax-inclusive and exclusive calculation modes
  • Standard and reduced tax rate switching
  • Clear division and remainder display
  • Create and copy calculation sheets
Read full description

Calc+α is an app designed to make daily calculations easier and more efficient. Each feature is intuitive, enabling anyone to use it effortlessly. Whenever there's a need for calculations, Calc+α will be your reliable partner. **Calculation Sheet with History** Calculator+α saves your past calculations in a list, allowing you to review them anytime. It displays subtotals for each calculation, making verification simple. For different purposes like travel or shopping, you can create and copy various sheets to organize your calculations. No need to note down the calculation results on paper anymore. **Mistake Correction Feature** No worries about mistakes. You can edit past calculations and recalculate. By changing numbers, adding or removing rows, you can proceed with your calculations accurately. **Tax Rate Calculation** Switch between tax-inclusive and tax-exclusive calculations with just one button. Furthermore, effortlessly switch between standard and reduced tax rates, smoothing out calculations for products with different tax rates. **Division and Remainder Calculation** With a clear remainder display, you can instantly grasp intermediate results in calculations. By setting the truncation position, you can adjust the display of remainders to your liking. No more headaches with remainders in division.

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
Read full description

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

Calc+α4 screens
Calta4 screens

Verdict

The call

The clearest difference is review sentiment: Calta at 100% against Calc+α's 0%. Calta also leads on update cadence (every 3 days vs every 3 weeks) and iOS requirement (11.0 vs 16.4). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calc+α ships an update every 3 weeks, Calta every 3 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 5 level
Calc+α versus Calta: the parameters behind the verdict, then further details
ParameterCalc+αCalta
PriceFreeFree
Positive reviews0.0% of reviews100.0% of reviews — better
Update frequencyEvery 3 weeksEvery 3 days — better
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supportedAd-supported
DevicesiPhoneiPhone, iPod — better
Requires iOS16.411.0 — better
Further details — not scored
Size9 MB23 MB
Age rating4+4+
DeveloperAriane Inc.Hiroki Oka

Customer experience

Calc+α

Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

Calta

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Calc+α

No in-app purchases

None

Calta

No in-app purchases

Questions

Is Calc+α free?
Calc+α is free to download, with no in-app purchases.
Is Calta free?
Calta is free to download, with no in-app purchases.
Do Calc+α or Calta have ads?
Both Calc+α and Calta show ads.
Which is updated more often, Calc+α or Calta?
Calc+α ships an update every 3 weeks, and Calta every 3 days. Most recently, Calc+α was updated on November 2, 2026 and Calta on November 3, 2026.

Other comparisons