Comparison

ReadableCalc vs スピードメーター

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

Head to head
About

ReadableCalc

Features
Read 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.

About

スピードメーター

Features
Read full description

A simple speedometer app designed for clear visibility and smooth operation while driving. • Minimal UI with status bar hidden for a clean display • Supports switching between km/h and MPH — ideal for international use • Japanese interface and dark mode supported Note: • Japanese UI is available only when the device language is set to Japanese. • This app uses GPS to display speed. Accuracy may be affected indoors or in areas with weak GPS signals.

Screenshots

ReadableCalc3 screens
スピードメーター4 screens

Verdict

The call

The clearest difference is ads: ReadableCalc at none against スピードメーター's shown. スピードメーター's advantage is update cadence (daily vs weekly). On price, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

ReadableCalc ships an update weekly, スピードメーター daily. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 4 level
ReadableCalc versus スピードメーター: the parameters behind the verdict, then further details
ParameterReadableCalcスピードメーター
PriceFreeFree
Update frequencyWeeklyDaily — better
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size28 MB25 MB
Age rating4+4+
DeveloperYONAGARE LABHayate Ito

In-app purchases

None

ReadableCalc

No in-app purchases

None

スピードメーター

No in-app purchases

Questions

Is ReadableCalc free?
ReadableCalc is free to download, with no in-app purchases.
Is スピードメーター free?
スピードメーター is free to download, with no in-app purchases.
Do ReadableCalc or スピードメーター have ads?
スピードメーター shows ads; ReadableCalc does not.
Which is updated more often, ReadableCalc or スピードメーター?
ReadableCalc ships an update weekly, and スピードメーター daily. Most recently, ReadableCalc was updated on November 8, 2026 and スピードメーター on November 5, 2026.

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