Just A Calc vs ReadableCalc
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Just A Calc
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This is Just A Calculator, nothing more, nothing less. The calculator will perform addition, subtraction, multiplication, division, percentage calculations, and find the square root. This will allow a maximum 38 digits to the left of the decimal and a maximum of 12 digits to the right of the decimal. This was developed primarily for the iPhone, however it will work on any iOS device.
ReadableCalc
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ReadableCalc is a calculator app that displays large numbersβlike 3 trillion 500 billionβin readable units. Itβs designed to make extremely large numbers more intuitive at a glance. Main Features β’ Supports four basic operations (+, β, Γ, Γ·) β’ Displays results in English numeric units for easy readability β’ Handles decimals and negative numbers β’ DEL button for deleting one character at a time (Long press to clear the entire expression) β’ Long press on expressions or results to copy β’ Tap on the βreadableβ result to toggle display between: β’ Short scale / Long scale / Kanji numerals Additional features in landscape mode: β’ β00β, β000β, and β0000β buttons for quickly adding zeros β’ βxΒ²β and βxΒ³β buttons for quick exponentiation Note: β’ Numbers exceeding 200 digits may be rounded due to calculation and display limitations. Please be cautious if you need high precision. β’ Short scale and Long scale support numbers up to 10^198. β’ Kanji numeral display supports up to 10^72. Larger numbers are shown in Arabic numerals instead.
Screenshots
Verdict
The clearest difference is update cadence: ReadableCalc at weekly against Just A Calc's every 38 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Just A Calc ships an update every 38 months, ReadableCalc weekly. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.
| Parameter | Just A Calc | ReadableCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 38 months | Weekly β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details β not scored | ||
| Size | 10 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Tom Doherty | YONAGARE LAB |
In-app purchases
Just A Calc
No in-app purchases
ReadableCalc
No in-app purchases
Questions
Is Just A Calc free?
Is ReadableCalc free?
Do Just A Calc or ReadableCalc have ads?
Which is updated more often, Just A Calc or ReadableCalc?
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