Comparison

Electronic Formulator vs NFC Card Reader & NFC Tags

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

Head to head
About

Electronic Formulator

Features
Read full description

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: • Ohm's Law — Voltage, current, resistance, and power calculations • Voltage Divider — Output voltage, resistor values, current, and power dissipation • Three-Phase Power — Balanced systems, Wye and Delta connections • LED Circuits — Series resistor selection, power dissipation, max LEDs in series • 555 Timer — Astable and monostable modes with frequency, duty cycle, and timing • RLC Circuits — Resonant frequency, Q factor, bandwidth, impedance, and reactance • Power Triangle — Real, reactive, and apparent power with PF correction sizing • Impedance & Resistance — AC/DC circuit analysis • Star-Delta Conversion — Transform between Y and Δ configurations • Wheatstone Bridge — Unknown resistance and unbalanced bridge voltage • Inductors — Reactance, energy storage, series/parallel, and time constants • Wire Sizing — Circular mils, voltage drop (single and three-phase) • Capacitors, Transformers, Motors, Batteries, UPS, Lighting, and more PRO CALCULATORS Unlock advanced tools for professionals: • Op-Amp Circuits — Inverting, non-inverting, differential, and voltage follower • Filter Design — RC and RL low-pass, high-pass, and bandpass filters • PCB Trace Width — IPC-2221 current capacity and trace resistance • Skin Effect — Depth calculations for copper and custom conductors 24 REFERENCE TABLES Instantly look up critical data — no more flipping through handbooks: • AWG Wire Gauge — Diameter, area, resistance, and ampacity • NEC Ampacity Table — 60°C, 75°C, and 90°C conductor ratings • Resistor Color Codes — 4-band and 5-band decoding • Standard Resistor Values — E12, E24, E48, and E96 series • Circuit Breaker Sizes — Amp ratings, wire sizes, and typical applications • Wiring Color Codes — NEC, IEC, and Australian standards • Logic Gates Truth Tables — AND, OR, NAND, NOR, XOR, XNOR • Transformer Connections — Delta, Wye, Scott-T, Zig-Zag, and more • Power Factor Reference — Typical PF for motors, lighting, drives, and loads • SI Prefixes — From tera to femto with electronics examples • Conductor Properties — Resistivity, conductivity, and temp coefficients • Common Semiconductor Pinouts — BJTs, MOSFETs, regulators, 555, 741 • NEMA Enclosure Types — Indoor/outdoor ratings with IP equivalents • IP Protection Ratings — Solids and liquids protection levels • Ampacity Derating Factors — Temperature and conduit fill corrections • Standard Capacitor Values — Ceramic, film, and electrolytic • Cable Types — THHN, THWN, NM-B, MC, UF-B, and more • Decibel Reference — Power and voltage ratios at a glance • 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, Réaumur, Delisle, Newton, and Rømer. BUILT FOR YOUR WORKFLOW • Favorites — Star the calculators you use daily for one-tap access • Calculation History — Every result saved automatically for easy reference • Export & Share — Send results to colleagues or save for documentation • Search & Filter — Find any formula or reference table in seconds • Dark Mode — Designed for comfortable use on job sites and in the field • US & Metric — 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 — getting the job done right. One purchase, no subscriptions, no recurring fees.

About

NFC Card Reader & NFC Tags

Easily read and scan NFC tags and contactless cards with your iOS device. View detailed tag information, save and export data, and work offline. Ideal for smart tech enthusiasts and IT professionals.

Highlights
  • NFC tag reading
  • Smart card detection
  • Detailed data view
  • Secure offline mode
  • Tag history and export
  • Intuitive interface
Features
Read full description

Unlock the Power of Contactless with NFC Card Reader & NFC Tags Experience a seamless way to read, scan, and interact with NFC (Near Field Communication) tags and cards using your iOS device. Whether you're exploring smart tech, verifying access cards, or experimenting with IoT, this app offers a fast and reliable NFC reading experience. Key Features: NFC Tag Reading: Instantly scan a variety of NFC tags, including NTAG, MIFARE, and more. Smart Card Detection: Identify and decode information from access cards and contactless credentials. Detailed Data View: View tag details such as payload, type, technology, serial number, and manufacturer. Secure & Offline Mode: Works without internet access for privacy-first scanning. Tag History & Export: Save scanned tag data and export for later use or analysis. Simple, Intuitive Interface: Clean UI designed for both beginners and advanced users. Perfect For: Smart card users and developers NFC tag hobbyists and experimenters IT professionals managing access systems Anyone curious about contactless tech Supported Tags Include: NTAG203, NTAG213, NTAG215, NTAG216, MIFARE Classic, MIFARE Ultralight, and more. Please Note: Your device must support NFC and have iOS 13 or later for full functionality. Reading encrypted or locked cards is not supported due to security restrictions. Download NFC Card Reader & NFC Tags now and start discovering the world of contactless technology today. To find out more about automatic subscription renewals: - Ad-free version - Access all Feature Premium Plans: CardRead One Week - 6.99 USD CardRead One Year - 44.99 USD Your payment will be charged to your iTunes Account. The app offering is auto-renewable subscriptions. For More Information : Privacy Policy : https://sonanibharatbhai.blogspot.com/2024/06/privacy-policy.html Terms of Use : https://sonanibharatbhai.blogspot.com/2024/06/terms-of-use.html

Screenshots

Electronic Formulator4 screens
NFC Card Reader & NFC Tags4 screens

Verdict

The call

The clearest difference is ads: Electronic Formulator at none against NFC Card Reader & NFC Tags's shown. Electronic Formulator also leads on update cadence (every 9 days vs every 7 months). NFC Card Reader & NFC Tags's advantage is iOS requirement (16.6 vs 26.2). On price, in-app purchases 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. Electronic Formulator sells 1 one-off in-app purchase and NFC Card Reader & NFC Tags sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Electronic Formulator ships an update every 9 days, NFC Card Reader & NFC Tags every 7 months. The most recent releases landed on October 8, 2026 and October 23, 2026 respectively.

Scorecard3 real differences · 7 level
Electronic Formulator versus NFC Card Reader & NFC Tags: the parameters behind the verdict, then further details
ParameterElectronic FormulatorNFC Card Reader & NFC Tags
PriceFreeFree
Rating—1.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 9 days — betterEvery 7 months
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS26.216.6 — better
Further details — not scored
Size19 MB63 MB
Age rating4+17+
DeveloperHistorycentral.comSonani Bharatbhai

In-app purchases

1 purchases

Electronic Formulator

One-time1
  • Electronic Pro$2.99
2 purchases

NFC Card Reader & NFC Tags

Subscriptions2
  • CardRead One Week$4.997 Days
  • CardRead One Year$19.991 Year

Questions

Is Electronic Formulator free?
Electronic Formulator is free to download, with in-app purchases available.
Is NFC Card Reader & NFC Tags free?
NFC Card Reader & NFC Tags is free to download, with in-app purchases available.
Do Electronic Formulator or NFC Card Reader & NFC Tags have ads?
NFC Card Reader & NFC Tags shows ads; Electronic Formulator does not.
Which is updated more often, Electronic Formulator or NFC Card Reader & NFC Tags?
Electronic Formulator ships an update every 9 days, and NFC Card Reader & NFC Tags every 7 months. Most recently, Electronic Formulator was updated on October 8, 2026 and NFC Card Reader & NFC Tags on October 23, 2026.

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