Electrical Calculations vs HF Drone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electrical Calculations
This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.
- Wire size and voltage drop calculations
- Power, current, and resistance calculations
- Motor performance and connection diagrams
- Electronic component calculations
- Extensive unit conversions
- PDF report generation
- Support for IEC, CEI, NEC, CEC standards
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Electrical Calculations is the PROFESSIONAL app for those who work with electrical systems every day: design, size and verify in just seconds, from the job site or the office. Over 200 calculations, diagrams, formulas and tables in a single app, with clear, printable PDF reports to attach to your documents. Designed for electricians, installers, designers and surveyors, it saves you time and helps you avoid mistakes: from cable sizing to short circuit. COMPLIANT WITH STANDARDS Reliable results aligned with the main standards: IEC (International Electrotechnical Commission), CEI (Italian Electrotechnical Committee), NEC (National Electrical Code), CEC (Canadian Electrical Code). WHY CHOOSE IT SAVE TIME: the calculations you'd do by hand, instantly available here. AVOID ERRORS: verified formulas and up-to-date regulatory parameters. PROFESSIONAL REPORTS: PDF reports ready for printing and archiving. ALWAYS WITH YOU: over 200 tools including calculations, converters, tables and pinouts. THE MOST USED CALCULATIONS Cable sizing and coordination with the protective device, voltage drop, operating current, current intensity, voltage and power (active, reactive, apparent). Power factor and power factor correction. Current capacity of conductors and busbars, sizing of conduits and trunking, maximum cable length. SHORT CIRCUIT AND PROTECTION Short-circuit current at a point on the line, earthing system and coordination with the residual current device, cable protection against short circuit (K²S²), power loss, cable temperature, neutral current. ELECTRIC MOTOR Motor current, power, voltage, efficiency and power factor, slip, speed, maximum torque and full-load current. Three-phase motor connection diagrams, terminal markings. Three-phase to single-phase. ELECTRONICS Color and alphanumeric codes for resistors, capacitors and inductors, SMD code, LED resistor, voltage and current divider, Zener diode, battery life, resonant frequency, fuses and transformers. CONVERSIONS Delta-star, AWG, SWG, cross-section, length, energy, temperature, pressure, Ah/kWh, var/µF, Gauss/Tesla, RPM and many more. RESOURCES AND TABLES Tripping curves, cable reactance and resistivity, cable dimensions and weight, distribution systems (TT, TN, IT), IP/IK/NEMA protection ratings, ATEX marking, insulation classes, electrical symbols, ANSI device codes, plugs and sockets, IEC 60309, NEMA and EV charging connectors, SI prefixes and units of measurement, thermistors and thermocouples. PINOUTS Ethernet RJ-45, Ethernet with PoE, USB, HDMI, VGA, DVI, RS-232, FireWire, SATA, DisplayPort, Apple Lightning, Raspberry Pi, OBD II, XLR audio/DMX, MIDI, Jack, RCA, Thunderbolt, SD Card, SIM Card and LED. Stop searching everywhere for formulas and tables: PUT YOUR ENTIRE ELECTRICAL LAB IN YOUR SMARTPHONE. Download Electrical Calculations and work faster, with standards-compliant results. Terms of service (EULA): https://www.egalnetsoftwares.com/terms_of_service_app/
HF Drone
This application enhances the visual experience of drone operation with HD previews and various shooting modes. It offers safety features for beginners and advanced functions for experienced pilots, ensuring a comprehensive and enjoyable flight experience.
- HD Preview and Camera
- Panoramic Shooting
- Electronic Image Stabilization
- GPS Following
- Automatic Return
- Flight Records
- Safety Features for Novices
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This is a diversified UAV mobile app: Compared with the app that pays attention to operation, it focuses more on visual experience. It includes Hd Preview, HD camera, HD video, various panoramic shooting, electronic image stabilization, GPS following, automatic return, dot cruising, palm control, electronic fence, image quality switching, full screen viewing mode, steering gear adjustment, search for unmanned aerial vehicles, flight records and other rich functions. For novices, it provides functions such as low-speed control, distance and altitude limitation, and one click return to ensure flight safety; For master pilots, it provides simple operation, runaway / low power return, low power reminder, flight record, aircraft search and other practical functions. Finally, connect your drone and let it fly!
Screenshots
Verdict
The clearest difference is rating: Electrical Calculations at 4.6 against HF Drone's 3.7. Electrical Calculations also leads on review sentiment (87% vs 50%) and ratings volume (129 vs 3). HF Drone's advantage is in-app purchases (none vs 2). On price, ads, device support and iOS requirement 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
Both are free to download. Electrical Calculations sells 2 in-app purchases, starting at $3.99 per 3 months. HF Drone asks for nothing beyond the download.
Electrical Calculations holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Electrical Calculations has 129 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 87% of Electrical Calculations's written reviews are positive against 50% of HF Drone's.
Electrical Calculations ships an update every 2 weeks, HF Drone every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Electrical Calculations | HF Drone |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (129 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 86.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 129 — better | 3 |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 56 MB | 222 MB |
| Age rating | 4+ | 4+ |
| Developer | Egal Net di Ettore Gallina | Robert Ronash |
Customer experience
Electrical Calculations
HF Drone
In-app purchases
Electrical Calculations
- PRO Version (3 months)$3.993 Months
- PRO Version (1 year)7 Days trial$7.491 Year
HF Drone
No in-app purchases
Questions
Is Electrical Calculations free?
Is HF Drone free?
Which has better reviews, Electrical Calculations or HF Drone?
Do Electrical Calculations or HF Drone have ads?
Which is updated more often, Electrical Calculations or HF Drone?
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