Calculation Pad vs RedoCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculation Pad
This calculator app keeps a history of your calculations, allowing you to easily reuse past results. It offers enhanced security features like fingerprint or password protection for sensitive data. Despite its advanced functionality, it remains free to use.
- Calculation history
- Reuse past calculations
- Add taxes
- Fingerprint/password/face protection
- Free to use
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Calculation Pad is a calculator. Of course it can keep your history, and add taxes to your calculation easily, and use your history for a new calculation. Even if you are a spy running a top secret project, you can easily protect your calculation result with your fingerprint or password or your face. However functional this calculator this is, it can't beat the price of your daily necessities. After all, it's just a calculator.
RedoCalc
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This is a calculator for people who only use it for simple calculations, such as adding up receipts or calculating the cost of a meal split between several people, but who are always worried about whether the input was correct. As it is a simple calculator, the only operations it can perform are - Four arithmetic operations (addition, subtraction, multiplication, division) - Percentage calculations (including calculations such as consumption tax using percentages) . The results are displayed as numbers with a digit symbol. There is no complicated exponential display. The calculation proceeds in the order of the keys you enter. There is no priority for multiplication or division. The formulas you enter are displayed in order in the upper area as a history. If you tap the white part, it will turn yellow and you will be able to modify that part. (You can modify not only numbers, but also arithmetic symbols such as + and ×.) If you tap “=”, the expressions from the first line to the last line will be recalculated. The result will be automatically copied, so you can switch to other apps and paste the value there.
Screenshots
Verdict
The clearest difference is in-app purchases: RedoCalc at none against Calculation Pad's 5. RedoCalc also leads on update cadence (every 3 days vs fortnightly). Calculation Pad's advantage is ads (none vs shown) and device support (3 vs 1). On price 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. Calculation Pad sells 5 one-off in-app purchases. RedoCalc asks for nothing beyond the download.
Calculation Pad ships an update fortnightly, RedoCalc every 3 days. The most recent releases landed on October 5, 2026 and September 25, 2026 respectively.
| Parameter | Calculation Pad | RedoCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Yukio Tajima | Toshiyuki Kuwabara |
In-app purchases
Calculation Pad
- Developer Support$0.99
- Small tip$0.99
- Medium tip$3.99
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- Developer Support$6.99
- Large tip$6.99
RedoCalc
No in-app purchases









