Resistor calc vs 九天八字
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Resistor calc
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Resistor Calc is an essential tool for anyone working with electronic circuits and resistors. Designed to streamline complex calculations and provide invaluable insights, this powerful app for iOS devices is a must-have in your toolkit. At the heart of Resistor Calc lies a comprehensive suite of calculators tailored to the needs of electrical engineers, students, hobbyists, and professionals. The series/parallel calculator makes it a breeze to determine the equivalent resistance for even the most intricate circuit configurations, eliminating the need for tedious manual calculations prone to errors. The LED series resistor calculator is a game-changer for those working with LED lighting systems. Simply input the required parameters, and Resistor Calc will recommend the ideal resistor value to ensure proper current limiting and protect your LEDs from potential damage, ensuring optimal performance and longevity. For three-phase circuits, the app's star-delta and delta-star converters streamline the process of switching between different wiring configurations. Whether you need to convert from star to delta or vice versa, Resistor Calc has you covered, saving you valuable time and effort. But the true standout feature of Resistor Calc is its powerful resistor color code decoder. Never again will you need to decipher those tiny colored bands manually. Simply input the color codes, and the app will instantly reveal the resistor's value, tolerance, and other essential information, making component identification a breeze and saving you countless hours of frustration. With its sleek and intuitive interface, Resistor Calc is designed for seamless navigation and ease of use. Whether you're a student grappling with complex circuit problems or a seasoned professional tackling intricate projects, this app empowers you with accurate and reliable calculations at your fingertips. Download Resistor Calc today and experience the power of efficient circuit analysis and resistor management on your iOS device. Streamline your workflow, minimize errors, and unlock new levels of productivity in your electrical engineering endeavours.
九天八字
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九天八字是一款基于中国传统命理学的八字排盘工具 【核心功能】 - 八字排盘 — 根据出生年月日时,精准生成四柱八字命盘 - 五行分析 — 直观呈现金木水火土五行强弱与生克关系 - 大运推演 — 自动排列一生大运走势 - 十神推断 — 体现命盘中的十神关系与格局 - 双人合盘 — 支持合朋友、合同事、合爱人~ 【温馨提示】 命理推算内容仅供参考与文化交流,不构成任何专业建议,请理性看待。
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Verdict
The clearest difference is price: 九天八字 at Free against Resistor calc's $1.99. 九天八字 also leads on update cadence (weekly vs every 2 months). Resistor calc's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 26.2). On ads and device support 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
九天八字 is free to download; Resistor calc costs $1.99 up front. 九天八字 sells 3 one-off in-app purchases. Resistor calc asks for nothing beyond the download.
Resistor calc ships an update every 2 months, 九天八字 weekly. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.
| Parameter | Resistor calc | 九天八字 |
|---|---|---|
| Price | $1.99 | Free — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 17 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Anas Abubakar | 美薇 殷 |
In-app purchases
Resistor calc
No in-app purchases
九天八字
- 月度会员$3.99
- 年度会员$29.99
- 8年会员$99.99









