Scientific Calculator Plus 991
EducationTran Duy
NCalc — Powerful Scientific Calculator, Graphing, and Converter NCalc combines a natural-display scientific calculator, advanced math tools, a full graphing module (as 83/84 calculator), a large formula library, and a comprehensive unit and currency converter—designed for students, engineers, and anyone who loves math. ◉ Main Calculator Features - Natural display: Enter expressions exactly as in textbooks—fractions, roots, exponents, and more—see results as written on paper. - Keyboard layout: Matches popular models for familiarity and speed: 115 ES Plus, 991 ES Plus, 300 ES Plus, and 991 EX. - Symbolic and numeric modes: Perform exact fraction calculation or evaluate numerically when needed. - Arbitrary precision integers: Work with very large integers without losing accuracy. - Output types: Choose from fraction, mixed fraction, decimal, repeating decimal, degrees/minutes/seconds, and polar coordinates. - Angle units: Degree, radian, and gradian (grade). - Decimal formatter: Display numbers in normal, engineering, engineering SI, scientific, or fixed formats. - Calculation history: Review and reuse past calculations with ease. - Copy and paste support for fast data entry and sharing. ◉ Algebra, Calculus, and Core Math - Algebra calculation: Expansion, factorization, simplification, and more. - Calculus calculator: Derivatives, integrals, and limits of expressions. - Complex number calculation: Arithmetic, polar/rectangular conversion, exponential, logarithm, powers, roots, and full trigonometric functions. ◉ Equations and Inequalities - Equation solver: Solve general equations, plus dedicated solvers for quadratic, cubic, and quartic equations. - System of equations solver: Solve systems with 2, 3, or 4 variables. - Inequality solvers: Quadratic, cubic, and quartic inequalities with interval-based solutions. ◉ Matrices and Vectors - Operations: Addition, subtraction, multiplication for matrices and vectors. - Advanced tools: Determinant, inverse, transpose, rank, eigenvalues, and eigenvectors. ◉ Statistics and Distributions - Statistical calculation: Descriptive stats and regression calculation (including a regression plotter). - Distribution calculation: Normal distribution, binomial distribution, Poisson distribution, t-distribution, chi-square distribution, and F-distribution. ◉ Number Bases and Formats - Base N calculation: Effortlessly switch between binary, octal, decimal, and hexadecimal, with arithmetic in each base. ◉ Tables, Variables, and Custom Functions - Table Generator: Generate value tables based on any expression and range. - Calculator variables: Store values and reuse them across calculations. - User-defined functions: Create your own functions to streamline repetitive work. - Built-in constants: A rich set of mathematical and physical constants. ◉ Formulas - Extensive formula collection: Math and Physics formulas, clearly categorized—ideal for secondary school, high school, and university students. ◉ Unit Converter - Currency Converter - 1000+ unit conversions ◉ Graphing as 83, 84 calculator - Cartesian functions, implicit plots, polar, and parametric. - Tracing, roots, intersections, extrema, derivative, and integral evaluations on graphs. ◉ Auto-renewing subscription You may purchase an auto-renewing subscription through an In-App Purchase. • Auto-renewable subscription • Your subscription will be charged to your AppStore account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your AppStore Account Settings after purchase • Privacy policy and terms of use: https://ncalc-app.web.app/terms-of-services.html
快速结论
Scientific Calculator Plus 991 当前最便宜地区是 尼日利亚
Scientific Calculator Plus 991 在 54 个国家和地区有可比较价格。当前最低价约为 $1.10，最高价约为 $3.18（匈牙利），选择最低价地区最多可节省 65%。价格每两天更新，汇率每日更新。
下一步：购买对应地区礼品卡后订阅
如果选择 尼日利亚 区，先准备该地区 Apple 礼品卡
当前最低价约 $1.10，理论最高可省 65%。购买前确认 Apple ID 地区、礼品卡地区和订阅 App 地区一致，避免余额无法兑换或订阅失败。
购买前检查
- Apple ID 地区必须和礼品卡地区一致。
- 订阅前确认 App 在该地区可用。
- 价格和税费可能随地区政策变化。
- 支付失败常见原因：地区不匹配、余额不足、账号风控。
订阅方案
全球价格对比(Calculator month subscription)
| # | 国家/地区 | 原价↕ | USD↑ | 标签 |
|---|---|---|---|---|
| 1 | 🇳🇬尼日利亚App Store | NGN 1,500 | $1.10 | 最低 |
| 2 | 🇹🇷土耳其App Store | TRY 59.99 | $1.27 | -60% |
| 3 | 🇪🇬埃及App Store | EGP 69.99 | $1.37 | -57% |
| 4 | 🇮🇩印尼App Store | IDR 29,000 | $1.61 | -49% |
| 5 | 🇵🇭菲律宾App Store | PHP 99 | $1.61 | -49% |
| 6 | 🇵🇰巴基斯坦App Store | PKR 500 | $1.80 | -43% |
| 7 | 🇹🇼台湾App Store | TWD 60 | $1.85 | -42% |
| 8 | 🇻🇳越南App Store | VND 49,000 | $1.86 | -41% |
| 9 | 🇯🇵日本App Store | JPY 300 | $1.88 | -41% |
| 10 | 🇧🇷巴西App Store | BRL 9.9 | $1.95 | -39% |
| 11 | 🇺🇸美国App Store | USD 1.99 | $1.99 | -37% |
| 12 | 🇦🇷阿根廷App Store | USD 1.99 | $1.99 | -37% |
| 13 | 🇧🇴玻利维亚App Store | USD 1.99 | $1.99 | -37% |
| 14 | 🇺🇦乌克兰App Store | USD 1.99 | $1.99 | -37% |
| 15 | 🌐App Store | KZT 999 | $2.05 | -35% |
| 16 | 🇮🇳印度App Store | INR 199 | $2.09 | -34% |
| 17 | 🇦🇺澳大利亚App Store | AUD 2.99 | $2.10 | -34% |
| 18 | 🇨🇦加拿大App Store | CAD 2.99 | $2.14 | -33% |
| 19 | 🇨🇱智利App Store | CLP 1,990 | $2.15 | -32% |
| 20 | 🇦🇪阿联酋App Store | AED 7.99 | $2.18 | -31% |
| 21 | 🇨🇳中国App Store | CNY 15 | $2.22 | -30% |
| 22 | 🇲🇽墨西哥App Store | MXN 39 | $2.25 | -29% |
| 23 | 🇷🇴罗马尼亚App Store | LEI 9.99 | $2.26 | -29% |
| 24 | 🇮🇹意大利App Store | EUR 1.99 | $2.29 | -28% |
| 25 | 🇵🇹葡萄牙App Store | EUR 1.99 | $2.29 | -28% |
| 26 | 🇪🇸西班牙App Store | EUR 1.99 | $2.29 | -28% |
| 27 | 🇫🇮芬兰App Store | EUR 1.99 | $2.29 | -28% |
| 28 | 🇫🇷法国App Store | EUR 1.99 | $2.29 | -28% |
| 29 | 🇩🇪德国App Store | EUR 1.99 | $2.29 | -28% |
| 30 | 🇬🇷希腊App Store | EUR 1.99 | $2.29 | -28% |
| 31 | 🇮🇪爱尔兰App Store | EUR 1.99 | $2.29 | -28% |
| 32 | 🇦🇹奥地利App Store | EUR 1.99 | $2.29 | -28% |
| 33 | 🇳🇱荷兰App Store | EUR 1.99 | $2.29 | -28% |
| 34 | 🇧🇪比利时App Store | EUR 1.99 | $2.29 | -28% |
| 35 | 🇭🇰香港App Store | HKD 18 | $2.30 | -28% |
| 36 | 🇰🇷韩国App Store | KRW 3,300 | $2.32 | -27% |
| 37 | 🇸🇬新加坡App Store | SGD 2.98 | $2.32 | -27% |
| 38 | 🇵🇪秘鲁App Store | PEN 7.9 | $2.33 | -27% |
| 39 | 🇨🇿捷克App Store | CZK 49 | $2.33 | -27% |
| 40 | 🇳🇿新西兰App Store | NZD 3.99 | $2.34 | -26% |
| 41 | 🇹🇭泰国App Store | THB 79 | $2.37 | -25% |
| 42 | 🇲🇾马来西亚App Store | MYR 9.9 | $2.42 | -24% |
| 43 | 🇿🇦南非App Store | ZAR 39.99 | $2.43 | -24% |
| 44 | 🇨🇭瑞士App Store | CHF 2 | $2.48 | -22% |
| 45 | 🇷🇺俄罗斯App Store | RUB 199 | $2.50 | -21% |
| 46 | 🇮🇱以色列App Store | ILS 7.9 | $2.58 | -19% |
| 47 | 🇵🇱波兰App Store | PLN 9.99 | $2.67 | -16% |
| 48 | 🇸🇦沙特App Store | SAR 9.99 | $2.68 | -16% |
| 49 | 🇬🇧英国App Store | GBP 1.99 | $2.68 | -16% |
| 50 | 🇩🇰丹麦App Store | DKK 19 | $2.93 | -8% |
| 51 | 🇸🇪瑞典App Store | SEK 29 | $3.04 | -4% |
| 52 | 🇳🇴挪威App Store | NOK 29 | $3.04 | -4% |
| 53 | 🇨🇴哥伦比亚App Store | COP 9,900 | $3.13 | -1% |
| 54 | 🇭🇺匈牙利App Store | HUF 999 | $3.18 | 最高 |
App Store 价格走势(Calculator month subscription)
免费用户可查看 7 天历史数据。升级 Pro 可查看 365 天。
Scientific Calculator Plus 991 价格概要
Scientific Calculator Plus 991 在全球 54 个国家和地区提供订阅服务。最低价格为 $1.10 USD（NG），最高价格为 $3.18 USD（HU）。通过选择最便宜的地区订阅，最多可节省 65%。
