Comparison

sci.calculator vs Custom Real

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
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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

Custom Real

Features
Read full description

This is a calculator application that can register formulas and perform real-time calculations. You can change the color of the buttons, background image, etc.

Screenshots

sci.calculator3 screens
Custom Real1 screens

Verdict

The call

The clearest difference is in-app purchases: Custom Real at none against sci.calculator's 1. Custom Real also leads on update cadence (every 3 days vs every 5 weeks). sci.calculator's advantage is ads (none vs shown). On price, 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. Custom Real asks for nothing beyond the download.

UpkeepUpdate frequency

sci.calculator ships an update every 5 weeks, Custom Real every 3 days. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 3 level
sci.calculator versus Custom Real: the parameters behind the verdict, then further details
Parametersci.calculatorCustom Real
PriceFreeFree
Update frequencyEvery 5 weeksEvery 3 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size49 MB5 MB
Age rating4+4+
DeveloperYukihiro Shioyakenta hamazaki

In-app purchases

1 purchases

sci.calculator

One-time1
  • remove Ads$1.99
None

Custom Real

No in-app purchases

Questions

Is sci.calculator free?
sci.calculator is free to download, with in-app purchases available.
Is Custom Real free?
Custom Real is free to download, with no in-app purchases.
Do sci.calculator or Custom Real have ads?
Custom Real shows ads; sci.calculator does not.
Which is updated more often, sci.calculator or Custom Real?
sci.calculator ships an update every 5 weeks, and Custom Real every 3 days. Most recently, sci.calculator was updated on October 16, 2026 and Custom Real on October 15, 2026.

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