Electronic Formulator vs Smart Lidar
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Electronic Formulator
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Electronic Engineer puts over 1,100 formulas and 24 reference tables in your pocket. No internet required. No ads. Just fast, accurate calculations when you need them. POWERFUL CALCULATORS Solve real-world electrical problems instantly: β’ Ohm's Law β Voltage, current, resistance, and power calculations β’ Voltage Divider β Output voltage, resistor values, current, and power dissipation β’ Three-Phase Power β Balanced systems, Wye and Delta connections β’ LED Circuits β Series resistor selection, power dissipation, max LEDs in series β’ 555 Timer β Astable and monostable modes with frequency, duty cycle, and timing β’ RLC Circuits β Resonant frequency, Q factor, bandwidth, impedance, and reactance β’ Power Triangle β Real, reactive, and apparent power with PF correction sizing β’ Impedance & Resistance β AC/DC circuit analysis β’ Star-Delta Conversion β Transform between Y and Ξ configurations β’ Wheatstone Bridge β Unknown resistance and unbalanced bridge voltage β’ Inductors β Reactance, energy storage, series/parallel, and time constants β’ Wire Sizing β Circular mils, voltage drop (single and three-phase) β’ Capacitors, Transformers, Motors, Batteries, UPS, Lighting, and more PRO CALCULATORS Unlock advanced tools for professionals: β’ Op-Amp Circuits β Inverting, non-inverting, differential, and voltage follower β’ Filter Design β RC and RL low-pass, high-pass, and bandpass filters β’ PCB Trace Width β IPC-2221 current capacity and trace resistance β’ Skin Effect β Depth calculations for copper and custom conductors 24 REFERENCE TABLES Instantly look up critical data β no more flipping through handbooks: β’ AWG Wire Gauge β Diameter, area, resistance, and ampacity β’ NEC Ampacity Table β 60Β°C, 75Β°C, and 90Β°C conductor ratings β’ Resistor Color Codes β 4-band and 5-band decoding β’ Standard Resistor Values β E12, E24, E48, and E96 series β’ Circuit Breaker Sizes β Amp ratings, wire sizes, and typical applications β’ Wiring Color Codes β NEC, IEC, and Australian standards β’ Logic Gates Truth Tables β AND, OR, NAND, NOR, XOR, XNOR β’ Transformer Connections β Delta, Wye, Scott-T, Zig-Zag, and more β’ Power Factor Reference β Typical PF for motors, lighting, drives, and loads β’ SI Prefixes β From tera to femto with electronics examples β’ Conductor Properties β Resistivity, conductivity, and temp coefficients β’ Common Semiconductor Pinouts β BJTs, MOSFETs, regulators, 555, 741 β’ NEMA Enclosure Types β Indoor/outdoor ratings with IP equivalents β’ IP Protection Ratings β Solids and liquids protection levels β’ Ampacity Derating Factors β Temperature and conduit fill corrections β’ Standard Capacitor Values β Ceramic, film, and electrolytic β’ Cable Types β THHN, THWN, NM-B, MC, UF-B, and more β’ Decibel Reference β Power and voltage ratios at a glance β’ Motor Frame Sizes, Fuse Classes, Conduit Fill, and more UNIT CONVERSIONS Over 400 conversion formulas across 19 categories including metric, linear, liquid, cubic, pressure, weight, flow, BTU, horsepower, watts, joules, frequency, and HVAC. Plus 8 temperature scales: Celsius, Fahrenheit, Kelvin, Rankine, RΓ©aumur, Delisle, Newton, and RΓΈmer. BUILT FOR YOUR WORKFLOW β’ Favorites β Star the calculators you use daily for one-tap access β’ Calculation History β Every result saved automatically for easy reference β’ Export & Share β Send results to colleagues or save for documentation β’ Search & Filter β Find any formula or reference table in seconds β’ Dark Mode β Designed for comfortable use on job sites and in the field β’ US & Metric β Toggle between unit systems instantly WHY ELECTRONIC ENGINEER? Built by engineers, for engineers. We obsessed over accuracy, speed, and completeness so you can focus on what matters β getting the job done right. One purchase, no subscriptions, no recurring fees.
Smart Lidar
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Smart Lidar is the EagleArca digital touchpoint for capturing 3D LiDAR surveys directly on site using compatible iPhone and iPad Pro devices. The app allows field operators to quickly document the real condition of excavations, pipes, site constraints, and work progress, turning each surveyed section into a georeferenced, photographic, and consultable 3D point cloud. The workflow is simple: select the project, set the origin point, start the scan, review the result, and save the survey. When a connection is available, you can manually sync the data with EagleArca Web, integrating it into operational projects and making it available for consultation, measurements, history tracking, and comparison with the design project. Smart Lidar is designed for linear jobsites, excavations, pipe installation, inspections, and as-built activities, even in environments where connectivity is not always stable. Key features: β’ 3D LiDAR scans from compatible Apple devices β’ Capture of the real jobsite condition β’ Point clouds with GPS coordinates and texture β’ Configurable scan quality: Standard, Pro, and Ultra β’ Local saving of surveys β’ Manual online sync with EagleArca Web β’ Integration with EagleArca projects β’ Automatic photos to support documentation β’ Exportable output associated with the operational project Compatible devices: Smart Lidar requires a LiDAR scanner, available on iPhone 12 Pro or later Pro models and on iPad Pro models from 2020 onward.
Screenshots
Verdict
The clearest difference is iOS requirement: Smart Lidar at 15.4 against Electronic Formulator's 26.2. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Electronic Formulator ships an update every 9 days, Smart Lidar fortnightly. The most recent releases landed on May 15, 2026 and September 18, 2026 respectively.
| Parameter | Electronic Formulator | Smart Lidar |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days β better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 26.2 | 15.4 β better |
| Further details β not scored | ||
| Size | 19 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Historycentral.com Inc | Eagleprojects S.p.A. |
In-app purchases
Electronic Formulator
No in-app purchases
Smart Lidar
No in-app purchases





