Comparison

Ohms Law Calc. vs CanvLess

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

CanvLess

This app provides a shared map of security cameras for verified law enforcement personnel. It helps investigators quickly identify camera locations, viewing angles, and footage retention times to efficiently gather evidence after an incident. The platform ensures accountability through user logging and watermarking.

Highlights
  • Shared security camera map
  • Camera location and direction
  • Footage retention tracking
  • Camera verification system
  • Apple Watch integration
  • Secure user authentication
Features
Read full description

CanvLess is a shared map of the security cameras investigators have found, built for verified United States law enforcement agency personnel. When something happens, the first hours decide whether footage survives. CanvLess shows the cameras other investigators have documented around a scene: where each one is, which way it faces and how far it sees, who owns it, how long it keeps footage, and who to ask for it. TRY IT FIRST A short demo on sample cameras runs before you sign in: drop a canvass, see which footage runs out first, then place and aim a camera. Nothing in the demo is real. CANVASS Press and hold where it happened, or drag the circle over the area you need. Set the time, and the cameras are listed by when their footage will be overwritten, so you knock on the right doors first. SEE WHAT EACH CAMERA SEES Every pin shows the camera's direction and range as a cone on the map. Tap a camera for its card: mount, picture quality by day and night, retention, and how to request footage. ADD AND CONFIRM Found a camera? Drop a pin on it, drag to aim it, and fill in what you know. When another investigator confirms it in person, it's marked verified. ON YOUR WRIST With Apple Watch, the cameras around you are a glance away: a map, the nearest ones with how long each keeps footage, and walking directions to any of them. BUILT FOR LAW ENFORCEMENT • Verified agency personnel only • One phone per account, unlocked with Face ID • No case details, footage or incident data, ever • Every view is logged, and the map carries your account as a watermark, so a leak traces back to an account CanvLess requires a verified CanvLess account. Sign in with the email on your account. Privacy policy: https://canvless.app/privacy Terms of use: https://canvless.app/terms

Screenshots

Ohms Law Calc.4 screens
CanvLess4 screens

Verdict

The call

The clearest difference is update cadence: CanvLess at daily against Ohms Law Calc.'s every 2 months. CanvLess also leads on rating (5.0 vs 4.7). Ohms Law Calc.'s advantage is ratings volume (1.3K vs 2). On price, ads, in-app purchases and monetization model 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 CanvLess sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CanvLess holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Ohms Law Calc. has 1.3K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Ohms Law Calc. ships an update every 2 months, CanvLess daily. Both last shipped on October 29, 2026.

Scorecard3 real differences · 7 level
Ohms Law Calc. versus CanvLess: the parameters behind the verdict, then further details
ParameterOhms Law Calc.CanvLess
PriceFreeFree
Rating4.7 (1.3K ratings)5.0 (2 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings1.3K — better2
Update frequencyEvery 2 monthsDaily — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS17.616.4 — better
Further details — not scored
Size59 MB67 MB
Age rating4+4+
DeveloperV PUGAZHENTHIAAK Studio LLC

Customer experience

Ohms Law Calc.

All ratings1,328 ratings
Positive92.8%
Neutral3.5%
Negative3.7%
Written reviews44 reviews
Positive50.0%
Neutral6.8%
Negative43.2%

CanvLess

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

CanvLess

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Ohms Law Calc.

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

CanvLess

Subscriptions2
  • Canvless Monthly7 Days trial$3.991 Month
  • Canvless Yearly$39.991 Year

Questions

Is Ohms Law Calc. free?
Ohms Law Calc. is free to download, with in-app purchases available.
Is CanvLess free?
CanvLess is free to download, with in-app purchases available.
Which has better reviews, Ohms Law Calc. or CanvLess?
CanvLess is rated higher. Ohms Law Calc. averages 4.7 out of 5 from 1.3K ratings, while CanvLess averages 5.0 from 2 ratings.
Do Ohms Law Calc. or CanvLess have ads?
Both Ohms Law Calc. and CanvLess show ads.
Which is updated more often, Ohms Law Calc. or CanvLess?
Ohms Law Calc. ships an update every 2 months, and CanvLess daily. Most recently, Ohms Law Calc. was updated on October 29, 2026 and CanvLess on October 29, 2026.

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