7gnuPrimeL∞R vs ReadableCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
7gnuPrimeL∞R
Read full descriptionHide full description
タイトル上段より [image→R]はボタン ・左に隣接する数字入力欄に奇数の数字を入力 ・仮に1を入力すると[range]1[~9]のように[範囲]が表示 ・これは1を含まない2~9の間の素数の[位置]を調べる ・上記のボタンを押す ・画面が右にスライドして結果が表示 ・結果は全て点の羅列である // ;;;;. ・これは左から// 2;3;5;7;9. を意味する ・起点が一桁までは補足として数字が下部に表示 ・二桁以降で素数の位置ではなく数字が知りたい場合は [Calc↓L]より調べる [Calc↓L]はボタン ・右に隣接する数字入力欄に奇数の数字を入力 ・仮に3を入力すると[range]9[~25]のように[範囲]が表示 ・これは11~25の間の素数を調べる意味(奇数) ・√9 = 3 ←この範囲を調べる→ √25 = 5 ・上記のボタンを押す ・画面が下部にスライドし結果が表示 ・Count:5のように素数の数も表記 [ゴミ箱]Alldeleteボタン ・テキスト文字を全て一括消去する ・メモリー記録などアプリで保存する機能はありませんのでご注意ください ・テキストは長押しでコピーやペーストが可能です
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 price: ReadableCalc at Free against 7gnuPrimeL∞R's $0.99. ReadableCalc also leads on iOS requirement (12.0 vs 14.2). On update cadence, 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
ReadableCalc is free to download; 7gnuPrimeL∞R costs $0.99 up front. 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 November 3, 2026 and October 25, 2026 respectively.
| Parameter | 7gnuPrimeL∞R | ReadableCalc |
|---|---|---|
| Price | $0.99 | Free — better |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Masaru Sasaki | YONAGARE LAB |
In-app purchases
7gnuPrimeL∞R
No in-app purchases
ReadableCalc
No in-app purchases
Questions
Is 7gnuPrimeL∞R free?
Is ReadableCalc free?
Do 7gnuPrimeL∞R or ReadableCalc have ads?
Which is updated more often, 7gnuPrimeL∞R or ReadableCalc?
Other comparisons















