Comparison

RF calculator & Smith Chart vs EMC Debug

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

Head to head
About

RF calculator & Smith Chart

This app provides a comprehensive suite of tools for RF engineers and enthusiasts, including impedance matching, network analysis, filter design, and antenna calculations. It simplifies complex RF engineering tasks with an intuitive interface and quick results.

Highlights
  • Smith Chart for impedance visualization
  • Impedance matching network design
  • RF filter design tools
  • RF attenuator design
  • Antenna and propagation calculations
  • RLC circuit analysis
  • Component design and reference
Features
Read full description

RF Calculator & Smith Chart is an all-in-one RF engineering toolkit for impedance matching, RF network analysis, antenna calculations, filters, attenuators and wireless system design. Built for RF engineers, electronics engineers, students, technicians and radio enthusiasts, it brings essential RF calculations and design tools together in one convenient app. Analyze impedance, work with Smith Charts, calculate VSWR and S11, design matching networks, estimate path loss, build RF attenuators and evaluate wireless links without jumping between multiple tools. RF & IMPEDANCE TOOLS • Smith Chart for impedance visualization and matching • S11 and reflection analysis • Reflection coefficient calculator • VSWR calculator • Impedance and transmission-line calculations • Cascaded RF network calculations IMPEDANCE MATCHING Design and analyze common RF matching networks: • L matching networks • Pi (π) matching networks • T matching networks • Stub tuner calculations Useful for antenna matching, RF amplifiers, transmission lines and other impedance-matching applications. RF FILTER DESIGN Calculate and design common passive and RF filters: • RC filters • RL filters • RLC networks • Butterworth LC low-pass filters • Chebyshev LC low-pass filters • Filter designs up to 8th order • Microstrip band-pass filters • Microstrip band-reject / notch filters RLC CIRCUITS Analyze frequency-dependent RLC networks: • Series RLC circuits • Parallel RLC circuits • Resonant frequency calculations • Frequency behavior and reactance RF ATTENUATOR DESIGN Quickly calculate standard RF attenuator networks: • Pi (π) attenuator • T attenuator • Bridged-T attenuator Ideal for RF signal-level control, impedance-matched pads and test setups. ANTENNA & PROPAGATION TOOLS Plan and evaluate RF and wireless systems with: • Antenna design utilities • Free-space path loss calculations • Friis transmission calculations • RF link budget calculator • Power density calculator • Radar maximum-range calculator COMPONENT DESIGN & REFERENCE Useful electronics tools are also included for RF design and prototyping: • Air-core inductor design • Spiral inductor design • Multi-layer air-core inductor calculations • SMD resistor code • Resistor color code • Resistors in series and parallel • SMD capacitor code • Capacitors in series and parallel BUILT FOR PRACTICAL RF WORK RF Calculator & Smith Chart is designed for quick engineering workflows. Select a tool, enter your parameters and get the values you need without working through repetitive equations manually. Use it for: • RF circuit design • Impedance matching • Antenna projects • Wireless link planning • Filter design • RF testing and troubleshooting • Electronics laboratories • Engineering study and coursework • Amateur radio and RF experimentation Whether you're checking VSWR, designing an impedance-matching network, calculating a link budget or experimenting with RF filters, RF Calculator & Smith Chart keeps essential RF engineering tools within easy reach.

About

EMC Debug

Features
Read full description

[Professional EMC Solutions, Your On-site Technical Expert] Designed for electronics engineers and EMC specialists, this app is the ultimate tool to boost testing efficiency and solve electromagnetic interference issues on the spot. We understand the challenges of working in controlled environments where information access is critical. Key Features: 100% Offline Access: Perfect for signal-free shielding rooms and anechoic chambers. Access all EMC solutions and technical documents without an internet connection during lab tests. Comprehensive EMI Strategies: Proven solutions for Conduction (CE), Radiation (RE), ESD, Surge, and other common electromagnetic compatibility challenges. Quick Lookup & Diagnosis: Locate issues instantly with an intuitive interface. Get specific advice on filtering, shielding, and grounding to speed up your R&D process. Who is this for? Hardware R&D Engineers EMC Test Engineers Product Certification Specialists Download now and streamline your product certification process anytime, anywhere! 【專業 EMC 整改方案,您的隨身技術專家】 這是一款專為電子工程師與 EMC 專家打造的專業工具,旨在提升測試效率並即時解決電磁干擾問題。我們深知在受限的實驗室環境中,快速獲取技術資料的重要性。 主要特色: 100% 完全離線使用: 專為無訊號的屏蔽室與電波暗室設計。實驗室測試期間無需網路,即可隨時查閱所有 EMC 整改方案與技術文件。 全方位整改對策: 收錄傳導 (CE)、輻射 (RE)、靜電 (ESD)、雷擊 (Surge) 等各類電磁相容挑戰的成熟解決方案。 快速查找與診斷: 直覺化的分類界面助您快速定位問題。提供濾波、屏蔽與接地的具體操作建議,大幅加速研發進度。 適用對象: 電子研發工程師 EMC 測試工程師 產品認證專員 立即下載,隨時隨地簡化您的產品認證流程!

Screenshots

RF calculator & Smith Chart4 screens
EMC Debug4 screens

Verdict

The call

The clearest difference is in-app purchases: EMC Debug at none against RF calculator & Smith Chart's 1. EMC Debug also leads on update cadence (weekly vs every 4 months) and iOS requirement (13.0 vs 15.0). RF calculator & Smith Chart's advantage is ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RF calculator & Smith Chart sells 1 one-off in-app purchase. EMC Debug asks for nothing beyond the download.

UpkeepUpdate frequency

RF calculator & Smith Chart ships an update every 4 months, EMC Debug weekly. The most recent releases landed on November 13, 2026 and November 9, 2026 respectively.

Scorecard4 real differences · 5 level
RF calculator & Smith Chart versus EMC Debug: the parameters behind the verdict, then further details
ParameterRF calculator & Smith ChartEMC Debug
PriceFreeFree
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 4 monthsWeekly — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size31 MB63 MB
Age rating4+4+
DeveloperAnas AbubakarCHEHUNG LIN

In-app purchases

1 purchases

RF calculator & Smith Chart

One-time1
  • upgrade to pro$5.99
None

EMC Debug

No in-app purchases

Questions

Is RF calculator & Smith Chart free?
RF calculator & Smith Chart is free to download, with in-app purchases available.
Is EMC Debug free?
EMC Debug is free to download, with no in-app purchases.
Do RF calculator & Smith Chart or EMC Debug have ads?
EMC Debug shows ads; RF calculator & Smith Chart does not.
Which is updated more often, RF calculator & Smith Chart or EMC Debug?
RF calculator & Smith Chart ships an update every 4 months, and EMC Debug weekly. Most recently, RF calculator & Smith Chart was updated on November 13, 2026 and EMC Debug on November 9, 2026.

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