Comparison

Belt Length Calculator 2PS vs RF calculator & Smith Chart

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

Head to head
About

Belt Length Calculator 2PS

Features
Read full description

The Belt Length Calculator is a versatile and handy mobile application designed to simplify the process of determining the optimal length of belts and pulleys for various mechanical systems and applications. Whether you're an engineer, a DIY enthusiast, or a technician, this app will be your go-to tool for accurate belt length calculations. Key Features: Intuitive Interface: The app offers a user-friendly interface that makes it easy for both professionals and beginners to use. Multiple Belt Types: The Belt Length Calculator supports a wide range of belt types, including V-belts, timing belts, flat belts, and more. Customizable Settings: You can input specific data for your application, such as pulley diameters, center-to-center distances, and belt type, allowing for precise calculations. Unit Conversion: The app supports various units of measurement, enabling you to work in the units that best suit your needs, including metric and imperial systems. Detailed Results: Get accurate results for belt length, effective belt length, and the number of teeth required for timing belts. These results can be crucial for ordering the right belt size. Save and Share: Save your calculations for future reference or share them with colleagues and friends through email or messaging apps. Quick Calculations: With just a few inputs, you can get instant results, eliminating the need for manual and time-consuming calculations. The Belt Length Calculator app is a must-have tool for engineers, mechanics, and anyone involved in belt-driven systems. It simplifies the process of selecting the right belt size, ensuring optimal performance and efficiency in your projects. Download the app today and take the guesswork out of belt length calculations.

About

RF calculator & Smith Chart

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.

Screenshots

Belt Length Calculator 2PS4 screens
RF calculator & Smith Chart4 screens

Verdict

The call

The clearest difference is price: RF calculator & Smith Chart at Free against Belt Length Calculator 2PS's $3.99. Belt Length Calculator 2PS's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.0). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

RF calculator & Smith Chart is free to download; Belt Length Calculator 2PS costs $3.99 up front. RF calculator & Smith Chart sells 1 one-off in-app purchase. Belt Length Calculator 2PS asks for nothing beyond the download.

UpkeepUpdate frequency

Belt Length Calculator 2PS ships an update every 3 months, RF calculator & Smith Chart every 4 months. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

Scorecard3 real differences · 3 level
Belt Length Calculator 2PS versus RF calculator & Smith Chart: the parameters behind the verdict, then further details
ParameterBelt Length Calculator 2PSRF calculator & Smith Chart
Price$3.99Free — better
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size54 MB31 MB
Age rating4+4+
DeveloperKantaben GorasiyaAnas Abubakar

In-app purchases

None

Belt Length Calculator 2PS

No in-app purchases

1 purchases

RF calculator & Smith Chart

One-time1
  • upgrade to pro$3.99

Questions

Is Belt Length Calculator 2PS free?
Belt Length Calculator 2PS costs $3.99, with no in-app purchases.
Is RF calculator & Smith Chart free?
RF calculator & Smith Chart is free to download, with in-app purchases available.
Do Belt Length Calculator 2PS or RF calculator & Smith Chart have ads?
Neither Belt Length Calculator 2PS nor RF calculator & Smith Chart shows ads.
Which is updated more often, Belt Length Calculator 2PS or RF calculator & Smith Chart?
Belt Length Calculator 2PS ships an update every 3 months, and RF calculator & Smith Chart every 4 months. Most recently, Belt Length Calculator 2PS was updated on October 27, 2026 and RF calculator & Smith Chart on October 22, 2026.

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