addition calc vs 電卓&ストップウォッチ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
addition calc
This calculator app clearly displays inputs and sums on separate rows for easy understanding. Perform basic arithmetic operations with large, accessible buttons. Customize decimal places and rounding for precise calculations.
- Separate input and sum display
- Large buttons for easy input
- Supports four input operations
- Customizable decimal places
- Adjustable rounding settings
- Optional vibration feedback
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The input (lower row) and the sum (upper row) are separated, so you can always understand the answer. How to use is simple, just enter the numbers and press the add button. Four input operations can be performed on the input (lower row), and the results can be added. You can set the total number of decimal places and rounding. You can also activate the vibrator when you touch the iPhone.
電卓&ストップウォッチ
This app combines a stopwatch, numerical counter, and calculator into a single, easy-to-use interface. It allows for simultaneous operation of all three tools, simplifying daily tasks.
- Simultaneous operation
- Stopwatch
- Numerical counter
- Calculator
- Simple interface
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日々の生活でよく使う「ストップウォッチ」「数値カウンター」「電卓」を1つの画面で同時に操作できるように設計しました。 シンプルな簡単操作でそれぞれの機能を独立して使用することができます。
Screenshots
Verdict
The clearest difference is ads: addition calc at none against 電卓&ストップウォッチ's shown. addition calc also leads on update cadence (monthly vs every 19 months) and monetization model (free vs ad-supported). On price, review sentiment, 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.
addition calc ships an update monthly, 電卓&ストップウォッチ every 19 months. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.
| Parameter | addition calc | 電卓&ストップウォッチ |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Monthly — better | Every 19 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 13.0 |
| Further details — not scored | ||
| Size | 13 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Shozo Obayashi | Ametiar |
Customer experience
addition calc
電卓&ストップウォッチ
In-app purchases
addition calc
No in-app purchases
電卓&ストップウォッチ
No in-app purchases
