Calta vs FuncNote
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。
FuncNote
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Write and calculate side-by-side with the Note Calculator—perfect for budgets, shopping lists, calorie tracking, and more. ==================== ◆ Top Use Cases ==================== • Budgeting: sort expenses by folder and check monthly totals in seconds • Shopping lists: compare "price × quantity + shipping" for bulk buys • Health tracking: instantly add up calories and PFC balance per ingredient • Study & work: save formulas with variables and recalc whenever you change a value ==================== ◆ Key Features ==================== • Basic arithmetic, variables, and user-defined functions • Built-in functions: exp, ln, log, pow, sqrt, sin, cos, tan, etc. • Constants: pi and Euler's number e • Comment lines for notes right inside your calculations • Folder organization to keep everything tidy • Theme switcher and adjustable font size • Rounding method and decimal-place controls ==================== ◆ Why You'll Love It ==================== 1. Every step is saved—spot input errors at a glance 2. Edit a number and results update instantly 3. Spreadsheet-level power with a fraction of the effort 4. More powerful than a calculator, lighter than a spreadsheet Capture the ease of notes and the power of a full scientific calculator. Download now and start a smarter way of crunching numbers! ==================== ◆ Disclaimer ==================== • Although we strive for accuracy, we cannot guarantee that all results and information are entirely correct or complete. Use at your own risk. • The developer is not liable for any direct or indirect damages arising from the use or inability to use this app, including but not limited to loss of profit, data, or business interruption.
Screenshots
Verdict
The clearest difference is in-app purchases: Calta at none against FuncNote's 2. Calta also leads on update cadence (every 3 days vs every 5 months) and iOS requirement (11.0 vs 17.0). FuncNote's advantage is ads (none vs shown). On price 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. FuncNote sells 2 in-app purchases, starting at $1.99 per month. Calta asks for nothing beyond the download.
Calta ships an update every 3 days, FuncNote every 5 months. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.
| Parameter | Calta | FuncNote |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 3 days — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 26 MB |
| Age rating | 4+ | 17+ |
| Developer | Hiroki Oka | Satoshi Kobayashi |
In-app purchases
Calta
No in-app purchases
FuncNote
- Pro plan$1.991 Month
- Pro plan$19.991 Year









