Comparison

Just A Calc vs ReadableCalc

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Just A Calc

Features
Read full description

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.

About

ReadableCalc

Features
Read full description

ReadableCalc is a calculator app that displays large numbersβ€”like 3 trillion 500 billionβ€”in readable units. It’s designed to make extremely large numbers more intuitive at a glance. Main Features β€’ Supports four basic operations (+, βˆ’, 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 β€œreadable” result to toggle display between: β€’ Short scale / Long scale / Kanji numerals Additional features in landscape mode: β€’ β€œ00”, β€œ000”, and β€œ0000” buttons for quickly adding zeros β€’ β€œx²” and β€œx³” 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

Just A Calc2 screens
ReadableCalc3 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference Β· 5 level
Just A Calc versus ReadableCalc: the parameters behind the verdict, then further details
ParameterJust A CalcReadableCalc
PriceFreeFree
Update frequencyEvery 38 monthsWeekly β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details β€” not scored
Size10 MB28 MB
Age rating4+4+
DeveloperTom DohertyYONAGARE LAB

In-app purchases

None

Just A Calc

No in-app purchases

None

ReadableCalc

No in-app purchases

Questions

Is Just A Calc free?
Just A Calc is free to download, with no in-app purchases.
Is ReadableCalc free?
ReadableCalc is free to download, with no in-app purchases.
Do Just A Calc or ReadableCalc have ads?
Neither Just A Calc nor ReadableCalc shows ads.
Which is updated more often, Just A Calc or ReadableCalc?
Just A Calc ships an update every 38 months, and ReadableCalc weekly. Most recently, Just A Calc was updated on September 9, 2026 and ReadableCalc on September 20, 2026.

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