SimpleSigma+ vs sci.calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimpleSigma+
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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.
sci.calculator
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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.
Screenshots
Verdict
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
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.
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.
| Parameter | SimpleSigma+ | sci.calculator |
|---|---|---|
| Price | $3.99 | Free — better |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | YUKARI KIKUCHI | Yukihiro Shioya |
In-app purchases
SimpleSigma+
No in-app purchases
sci.calculator
- remove Ads$1.99









