Comparison

SimpleSigma+ vs sci.calculator

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

Head to head
About

SimpleSigma+

Features
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"SimpleSigma+” easily totals numerical values in a table. You don't need to input extra data, so you can quickly input values only and get the calculation result. Its function and characteristics are ————————- 3 types of spreadsheet [Simple] -- Sum of simple numbers [Duplex] -- Enter and calculate the quantity for each value too [Shopping] -- Enter quantity and consumption tax for each value too and calculate Swipe the keyboard to quickly move the active cell. Each time you tap the key, it will be recalculated so you can see the result immediately. Initial setting of consumption tax is possible. Saving and reusing each calculation data. Data import and export in CSV format. ————————- Enjoy the maximum comfort with a simple and easy-to-understand interface. "SimpleSigma +" does not display advertisements. It can be used in full screen. There is also a free version "SimpleSigma" that displays advertisements.

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.

Screenshots

SimpleSigma+4 screens
sci.calculator3 screens

Verdict

The call

The clearest difference is price: sci.calculator at Free against SimpleSigma+'s $3.99. sci.calculator also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.1). SimpleSigma+'s advantage is in-app purchases (none vs 1). On update cadence and ads 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

sci.calculator is free to download; SimpleSigma+ costs $3.99 up front. sci.calculator sells 1 one-off in-app purchase. SimpleSigma+ asks for nothing beyond the download.

UpkeepUpdate frequency

SimpleSigma+ ships an update every 3 weeks, sci.calculator every 5 weeks. The most recent releases landed on September 30, 2026 and September 11, 2026 respectively.

Scorecard4 real differences · 2 level
SimpleSigma+ versus sci.calculator: the parameters behind the verdict, then further details
ParameterSimpleSigma+sci.calculator
Price$3.99Free — better
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.115.0 — better
Further details — not scored
Size1 MB49 MB
Age rating4+4+
DeveloperYUKARI KIKUCHIYukihiro Shioya

In-app purchases

None

SimpleSigma+

No in-app purchases

1 purchases

sci.calculator

One-time1
  • remove Ads$1.99

Questions

Is SimpleSigma+ free?
SimpleSigma+ costs $3.99, with no in-app purchases.
Is sci.calculator free?
sci.calculator is free to download, with in-app purchases available.
Do SimpleSigma+ or sci.calculator have ads?
Neither SimpleSigma+ nor sci.calculator shows ads.
Which is updated more often, SimpleSigma+ or sci.calculator?
SimpleSigma+ ships an update every 3 weeks, and sci.calculator every 5 weeks. Most recently, SimpleSigma+ was updated on September 30, 2026 and sci.calculator on September 11, 2026.

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