らくらく電卓 vs ReadableCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
らくらく電卓
This simple calculator app keeps a history of your calculations and allows you to edit input formulas. It also features a comparison tool for shopping to easily determine the best value between two items.
- Calculation history and results
- Editable input formulas
- Copy and paste past calculations
- Two-item price comparison
- Offline functionality
- No internet or account required
Read full descriptionHide full description
「らくらく電卓」は、計算式と結果を残しながら使える、シンプルな電卓アプリです。 日々の計算から、お買い物での価格比較まで、手軽に使えます。 計算式と答えを画面に残せるので、あとから計算の流れを確認できます。 入力中の式はカーソルを動かして修正でき、過去の式や結果を誤って書き換える心配もありません。 お買い物には「比較」機能が便利です。 2商品の価格と内容量・個数を入力すると、単価を自動で比較し、どちらがお得かすぐに分かります。 【主な機能】 - 四則演算、括弧、累乗、平方根 - 計算式と結果の履歴保存 - 前回の計算結果の呼び出し - 過去の式・結果のコピー - 入力中の式へのペースト - 2商品の単価比較 - 全消去前の確認表示 インターネット接続やアカウント登録は不要です。 計算と履歴保存は端末内で完結し、オフラインでも使えます。
ReadableCalc
Read full descriptionHide full description
ReadableCalc is a calculator app that displays large numbers—like 3 trillion 500 billion—in readable units. It’s designed to make extremely large numbers more intuitive at a glance. Main Features • Supports four basic operations (+, −, ×, ÷) • Displays results in English numeric units for easy readability • Handles decimals and negative numbers • DEL button for deleting one character at a time (Long press to clear the entire expression) • Long press on expressions or results to copy • Tap on the “readable” result to toggle display between: • Short scale / Long scale / Kanji numerals Additional features in landscape mode: • “00”, “000”, and “0000” buttons for quickly adding zeros • “x²” and “x³” buttons for quick exponentiation Note: • Numbers exceeding 200 digits may be rounded due to calculation and display limitations. Please be cautious if you need high precision. • Short scale and Long scale support numbers up to 10^198. • Kanji numeral display supports up to 10^72. Larger numbers are shown in Arabic numerals instead.
Screenshots
Verdict
The clearest difference is iOS requirement: ReadableCalc at 12.0 against らくらく電卓's 15.6. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | らくらく電卓 | ReadableCalc |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | noboru hizukuri | YONAGARE LAB |
In-app purchases
らくらく電卓
No in-app purchases
ReadableCalc
No in-app purchases









