Comparison

Ohms Law Calc. vs QR Code Generator Studio

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

Head to head
About

Ohms Law Calc.

This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.

Highlights
  • Ohm's Law calculations
  • Voltage drop calculator
  • Wire size calculator
  • Impedance calculations (R, L, C)
  • Electrical unit converters
  • Power and current conversions
  • Circuit design tools
Features
Read full description

Ohm's Law Calc. consists of 60 Electrical Calculators with Formulas and Circuits and 16 Electrical Converters. • Voltage Calculator • Current Calculator • Resistance Calculator • Power Calculator • Voltage Drop Calculator • Wire Size Calculator • DC Generator Calculator • Transformer Calculations (Voltage & Current) Impedance Calculators Calculate impedance for combinations of resistors (R), inductors (L), and capacitors (C) in both series and parallel configurations: • R and L in Series / Parallel • R and C in Series / Parallel • L and C in Series / Parallel • R, L and C in Series / Parallel Power and Current Conversions • kVA to Amps (Single Phase & Three Phase) • Amps to kVA (Single Phase & Three Phase) • Single Phase & Three Phase Power Calculators • Horsepower Calculators (DC, Single Phase, Three Phase) Efficiency and Power Factor Tools • Efficiency Calculators (DC, Single Phase, Three Phase) • Power Factor Calculators (Single Phase & Three Phase) Energy Storage Calculators • Energy Cost Calculator • Energy Storage Calculators (Resistance, Inductance, Capacitance) Circuit Design Tools • Star-to-Delta and Delta-to-Star Conversions • Inductive & Capacitive Reactance Calculators • Resonant Frequency Calculator • Inductor and Capacitor Sizing Equations Component Calculations • Series and Parallel Calculators for Resistance, Inductance, and Capacitance • Unknown Resistance and Capacitance Calculators (Series & Parallel) More Calculations • Neutral Current (3-Phase Unbalanced Loads) • Characteristic Impedance (Parallel & Coaxial) • Transformer Calculator • Voltage Divider Calculator Illumination Calculators • Luminous Intensity Calculator • Luminous Flux Calculator • Solid Angle Calculator Electrical Converters • Field Strength Converter • Electrical Potential Converter • Resistance and Resistivity Converters • Conductance and Conductivity Converters • Capacitance and Inductance Converters • Charge Converters: Handles conversions for electrical charge, including: • Linear Charge Density • Surface Charge Density • Volume Charge Density • Linear Current Density • Surface Current Density • Power Converter App works with both iPhones, iPads and Mac Multiple Unit Compatibility: Supports a wide range of units for all electrical parameters, including Ohms, kiloOhms, Farads, Henrys, kVA, Volts, Weber, and more.

About

QR Code Generator Studio

Features
Read full description

Create beautiful QR codes in seconds. QR Code Generator Studio is the fast, friendly QR maker for iPhone — design a custom code for your website, Wi-Fi, contact card or social profile, style it until it feels yours, and share it anywhere. Pick a type, type a link, and your code appears instantly — ready to save, print, or drop on a menu, flyer, business card, or story. CREATE ANY QR CODE - Websites and links, plain text, email, SMS, and phone numbers - Wi-Fi codes guests can scan to join your network - Contact cards (vCard and meCard) and calendar events - Locations with a built-in map picker - Social profiles: Instagram, TikTok, X, WhatsApp, Telegram, Facebook, Snapchat, Viber, Spotify - Crypto wallets: Bitcoin, Ethereum, Ripple, Solana and more - Barcodes too: Code 128, Code 39, Code 93, EAN-8, EAN-13 MAKE IT YOURS - Patterns: classic squares, smooth rounded, playful dots - Color themes: Classic, Purple, Sunset, Ocean, Mono Dark - Or go custom with your own foreground and background colors - Watch your code restyle live as you design SAVE, SHARE, PRINT - Every code you make is saved to your library automatically - Save to Photos, copy, share, or print in a tap - Come back and edit any code later SCAN SMART, TOO - Built-in scanner for QR codes and barcodes - Every scanned link is safety-checked: see the real destination, HTTPS status, and domain age, with warnings for known-malicious and look-alike links - Scan straight from a photo in your library - Scan history, with a Private Mode when you'd rather keep none BUILT TO LOVE - Clean, modern design that makes creating fun - No account needed - Available in 13 languages Whether it's a menu, an invitation, a storefront sign, or just your Wi-Fi password on the fridge — make a code that looks as good as what it links to. Payment is charged to your Apple ID at confirmation of purchase. Your subscription renews automatically unless it is canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your account settings. Privacy Policy: https://pocketknifeapps.com/privacy.html Terms of Use: https://pocketknifeapps.com/terms.html

Screenshots

Ohms Law Calc.4 screens
QR Code Generator Studio4 screens

Verdict

The call

The clearest difference is ads: QR Code Generator Studio at none against Ohms Law Calc.'s shown. On price, update cadence, 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. Ohms Law Calc. sells 1 one-off in-app purchase and QR Code Generator Studio sells 1 in-app purchase, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Ohms Law Calc. ships an update every 2 months, QR Code Generator Studio monthly. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

Scorecard1 real difference · 9 level
Ohms Law Calc. versus QR Code Generator Studio: the parameters behind the verdict, then further details
ParameterOhms Law Calc.QR Code Generator Studio
PriceFreeFree
Rating4.7 (1.3K ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings1.3K — better—
Update frequencyEvery 2 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size59 MB5 MB
Age rating4+4+
DeveloperV PUGAZHENTHIPocketKnife Apps Inc.

Bugs and requests

Ohms Law Calc.

Reported bugs

3 issues
  • Paid version not unlocking
  • Repeatedly prompting for payment after already paid
  • Keyboard overlaying results making it difficult to see

Requested features

3 requests
  • Add more electrical conversions and calculations
  • Add ability to input voltage and resistance to get amps and watts
  • Add kVA, rms, and other popular needed conversions

QR Code Generator Studio

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Ohms Law Calc.

One-time1
  • Ohms Law Calc.$3.99
1 purchases

QR Code Generator Studio

Subscriptions1
  • QR Scan Pro3 Days trial$7.997 Days

Questions

Is Ohms Law Calc. free?
Ohms Law Calc. is free to download, with in-app purchases available.
Is QR Code Generator Studio free?
QR Code Generator Studio is free to download, with in-app purchases available.
Do Ohms Law Calc. or QR Code Generator Studio have ads?
Ohms Law Calc. shows ads; QR Code Generator Studio does not.
Which is updated more often, Ohms Law Calc. or QR Code Generator Studio?
Ohms Law Calc. ships an update every 2 months, and QR Code Generator Studio monthly. Most recently, Ohms Law Calc. was updated on October 14, 2026 and QR Code Generator Studio on October 4, 2026.

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