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.
ReadableCalc
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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.
スピードメーター
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | ReadableCalc | スピードメーター |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 28 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | YONAGARE LAB | Hayate Ito |
In-app purchases
ReadableCalc
No in-app purchases
スピードメーター
No in-app purchases









