Comparison

Calta vs Simple Calculator Multi

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
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。

About

Simple Calculator Multi

Features
Read full description

This is a simple calculator that comes in handy when you want to do some quick calculations. It does not display ads and does not use unnecessary permissions. It supports multiple screens, so you can perform multiple calculations at the same time. You can change the look and feel with themes and customize it yourself. How to operate - Clear Button long press ... All clear - Backspace Button long press... Clear. - Screen long press - Copy or Paste - History long press... Copy or delete history. - Custom Theme long press... Delete or Rename.

Screenshots

Calta4 screens
Simple Calculator Multi4 screens

Verdict

The call

The clearest difference is ads: Simple Calculator Multi at none against Calta's shown. Calta's advantage is update cadence (every 3 days vs every 6 months) and iOS requirement (11.0 vs 13.4). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calta ships an update every 3 days, Simple Calculator Multi every 6 months. The most recent releases landed on June 4, 2026 and September 14, 2026 respectively.

Scorecard3 real differences · 5 level
Calta versus Simple Calculator Multi: the parameters behind the verdict, then further details
ParameterCaltaSimple Calculator Multi
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 3 days — betterEvery 6 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.0 — better13.4
Further details — not scored
Size23 MB14 MB
Age rating4+4+
DeveloperHiroki Okatadashi endo

In-app purchases

None

Calta

No in-app purchases

None

Simple Calculator Multi

No in-app purchases

Questions

Is Calta free?
Calta is free to download, with no in-app purchases.
Is Simple Calculator Multi free?
Simple Calculator Multi is free to download, with no in-app purchases.
Do Calta or Simple Calculator Multi have ads?
Calta shows ads; Simple Calculator Multi does not.
Which is updated more often, Calta or Simple Calculator Multi?
Calta ships an update every 3 days, and Simple Calculator Multi every 6 months. Most recently, Calta was updated on June 4, 2026 and Simple Calculator Multi on September 14, 2026.

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