Comparison

Ohmly vs FieldCalc Pro

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

Head to head
About

Ohmly

Features
Read full description

Your electrical toolkit, redesigned for speed. 26 pro tools, one clean app. Ohmly is the modern electrical calculator for electricians, students, and engineers. Solve VIRP calculations, decode resistor and SMD codes, check voltage drop, size conductors, design circuits, and keep your work organizedβ€”without ads. 26 PRO TOOLS β€’ Ohm's law, resistor color code, SMD resistor code β€’ Series/parallel resistance, voltage divider, LED resistor β€’ Reactance, resonance, AC impedance, power factor β€’ RC/RL/LC filters, decibels, op-amp gain, 555 timer β€’ Voltage drop, wire gauge/AWG, three-phase power β€’ Motor FLA, conduit fill, short-circuit current β€’ Transformer ratio, LM317 regulator β€’ Capacitor code, inductor color code, PCB trace width β€’ Heat sink thermal resistance and battery life WHY OHMLY β€’ Clean light and dark modes with no ads β€’ Shared display metrics across every tool β€’ Save, label, and search calculations β€’ Export multi-calculation PDF reports β€’ Home Screen, Lock Screen, and StandBy widgets β€’ Full Apple Watch companion Unlock Pro with a lifetime purchase or a low monthly plan. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

FieldCalc Pro

Features
Read full description

FieldCalc Pro puts 28 professional trade calculators in your pocket β€” built for the job site, referenced to real codes, and 100% offline. ELECTRICAL (NEC 2023) Ohm's Law, Voltage Drop, Wire Sizing with DLO cable & parallel conductor support, Conduit Fill, Load Calculator, Motor FLA, Transformer Sizing, Breaker & Fuse Sizing, Power Factor Correction. HVAC (ASHRAE) BTU Heat Load, CFM Airflow, Duct Sizing, Equipment Sizing, Refrigerant Charge, Ventilation Rate (ASHRAE 62.1), Psychrometric, Heat Exchanger, Cooling Tower. CONSTRUCTION (IRC / ACI) Concrete Volume, Paint Coverage, Lumber Framing, Drywall Estimator, Roof Pitch & Area, Gravel & Aggregate, Brick & Block, Rebar Spacing (ACI 318-19), Staircase (IRC R311.7), Tile Estimator. EVERY CALCULATOR SHOWS ITS CODE Each result cites the applicable standard and edition year. Compliance badges show whether a calculator is code-compliant, standards-referenced, or an estimation tool. Wire sizes display both AWG/kcmil and mmΒ² for international use. PRO FEATURES - All 28 calculators unlocked - Job-site photo attachments (up to 3 per calculation) - Batch calculations β€” compare up to 20 scenarios side by side - PDF reports with your company logo and license number - CSV export for estimating and documentation - Imperial/metric toggle on all results - Calculation history with search and trade filter - Unlimited projects - iCloud sync across devices FREE FEATURES - 6 calculators (2 per trade) with full code references - Unit converter with AWG-to-mmΒ², HP-to-kW, and more - 1 project - Works 100% offline β€” no account, no internet, no tracking BUILT FOR THE FIELD - Large touch targets for gloves and sunlight - Input memory remembers your last values - Haptic feedback on calculations and compliance results - Spotlight search β€” find any calculator from your home screen - Quick Actions β€” jump to recent calculators from the app icon Start with a 7-day free trial. $4.99/month or $49.99/year after trial. Support URL: https://www.bytecovesoftware.com/fieldcalc/support Marketing URL: https://www.bytecovesoftware.com/fieldcalc Privacy Policy URL: https://www.bytecovesoftware.com/fieldcalc/privacy

Screenshots

Ohmly4 screens
FieldCalc Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Ohmly at none against FieldCalc Pro's 2. FieldCalc Pro's advantage is iOS requirement (18.6 vs 26.0). On price, ads and device support 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. FieldCalc Pro sells 2 in-app purchases, starting at $4.99 per month. Ohmly asks for nothing beyond the download.

Scorecard2 real differences Β· 4 level
Ohmly versus FieldCalc Pro: the parameters behind the verdict, then further details
ParameterOhmlyFieldCalc Pro
PriceFreeFree
Update frequencyEvery 3 weeksβ€”
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, Apple Watch β€” betteriPhone, iPad
Requires iOS26.018.6 β€” better
Further details β€” not scored
Size7 MB2 MB
Age rating4+4+
DeveloperAdam WilkieTroy Bearden

In-app purchases

None

Ohmly

No in-app purchases

2 purchases

FieldCalc Pro

Subscriptions2
  • FieldCalc Pro Monthly7 Days trial$4.991 Month
  • FieldCalc Pro Yearly$49.991 Year

Questions

Is Ohmly free?
Ohmly is free to download, with no in-app purchases.
Is FieldCalc Pro free?
FieldCalc Pro is free to download, with in-app purchases available.
Do Ohmly or FieldCalc Pro have ads?
Neither Ohmly nor FieldCalc Pro shows ads.

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