Calta vs No
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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。
No
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iCalcSpeed is a calculator app that can calculate with the fewest operations. There is no equal key and you can save time by reducing even one tap operation. The two input values are displayed as they are after calculation, so you can check calculations reliably. It has an independent memory that is always visible. There is ⓘ button to display the information page that describes instructions. Thank you for using iCalcSpeed. (Basic operation method) A Calculation is performed each time you tap a key to enter a number or tap an operator key. A number will be entered in the cell with a white frame. If you tap an input cell without a white frame, "0" will be entered with a white frame. If you tap the operator key while the upper input cell is framed in white, the lower input cell will be framed in white and "0" will be entered. If you tap the operator key after entering a number in the lower input cell, the result will be entered in the upper input cell and "0" will be entered in the lower input cell to enter the input state. (Independent memory) [M+] key adds the calculated value to the memory cell. [M-] key subtracts the calculated value from the memory cell. [MR] key inputs a memory cell value into an input cell with a white frame. [MC] key clears the value of the memory cell. Flipping the memory cell also clears it. (Other keys) [>] key deletes the rightmost input value of the cell with a white frame. Flipping a cell with a white frame will also delete the rightmost input value. [copy] key puts the calculated value into the clipboard. [paste] key puts the clipboard value into the cell with a white border. [< Prev] key moves the calculation back one step at a time. [Next >] key advances the calculation returned by the [< Prev] key one step at a time. (Remarks) The calculation range is −999,999,999,999 ~ 999,999,999,999. The maximum number of digits is 12. The developer assumes no responsibility for any loss or claims by third parties which may arise from the use of this app.
Screenshots
Verdict
The clearest difference is update cadence: Calta at every 3 days against No's every 2 months. Calta also leads on iOS requirement (11.0 vs 15.0). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Calta ships an update every 3 days, No every 2 months. Both last shipped on November 3, 2026.
| Parameter | Calta | No |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 3 days — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 23 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroki Oka | Takao Ichimura |
In-app purchases
Calta
No in-app purchases
No
No in-app purchases









