Comparison

sci.calculator vs Calendar LED

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

Head to head
About

sci.calculator

Features
Read full description

A stylish yet powerful scientific calculator. The app is designed with a single-screen layout for simple and intuitive operation. Calculation history is saved and can be reused easily. Results are shown in both mathematical notation and decimal format. 【Main Features】 • Basic arithmetic, modulo, trigonometric functions • Exponential, logarithmic, power and root calculations • Unit conversion and 47 scientific constants (CODEC2022) • Prime factorization, GCD and LCM • Binary, octal and hexadecimal calculations with logical operations • 8 memory slots • Permutations, combinations, and pseudo-random numbers • Systems of linear equations (up to 4 variables) • Polynomial equations (up to 4th degree) • Equation solving using Newton’s method • Time and angle calculations • External keyboard support 【Designed for Ease of Use】 • Unit conversion includes intuitive units such as “Tokyo Dome volume,” light-years, and cooking measurements. • Choose from 6 color themes to match your iPhone or iPad. • Quick switching between RAD/DEG and number bases on a single screen. • Supports iPad multitasking, allowing calculations alongside other apps. Clean, readable, and efficient. A scientific calculator that combines functionality with a modern design.

About

Calendar LED

This app displays your calendar events using a unique, station-style departure board aesthetic. It offers practical alerts for upcoming schedules and features themes inspired by Japanese railway stations.

Highlights
  • Station-style calendar event display
  • Practical schedule alerts
  • Japanese railway station themes
  • Customizable themes
  • Event notifications
Features
Read full description

This app displays your calendar events in the style of Japanese railway departure boards. It not only appeals to railway enthusiasts, but also provides practical alerts to keep you on top of your upcoming schedules. Themes inspired by station departure boards from across Japan—including Tokyo, Nagoya, and Shin-Osaka—are included and can be switched at any time.

Screenshots

sci.calculator3 screens
Calendar LED2 screens

Verdict

The call

The clearest difference is in-app purchases: Calendar LED at none against sci.calculator's 1. Calendar LED also leads on update cadence (weekly vs every 5 weeks). On price, ads, 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. sci.calculator sells 1 one-off in-app purchase. Calendar LED asks for nothing beyond the download.

UpkeepUpdate frequency

sci.calculator ships an update every 5 weeks, Calendar LED weekly. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 6 level
sci.calculator versus Calendar LED: the parameters behind the verdict, then further details
Parametersci.calculatorCalendar LED
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 5 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size49 MB41 MB
Age rating4+4+
DeveloperYukihiro ShioyaTOMIHIDE OTA

In-app purchases

1 purchases

sci.calculator

One-time1
  • remove Ads$1.99
None

Calendar LED

No in-app purchases

Questions

Is sci.calculator free?
sci.calculator is free to download, with in-app purchases available.
Is Calendar LED free?
Calendar LED is free to download, with no in-app purchases.
Do sci.calculator or Calendar LED have ads?
Neither sci.calculator nor Calendar LED shows ads.
Which is updated more often, sci.calculator or Calendar LED?
sci.calculator ships an update every 5 weeks, and Calendar LED weekly. Most recently, sci.calculator was updated on October 16, 2026 and Calendar LED on October 25, 2026.

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