Comparison

OCS vs Electric Master

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

Head to head
About

OCS

Features
Read full description

With the OCS Smart maintenance app you can easily manage and configure your installation of Ojmar OCS Smart locks

About

Electric Master

This app provides a suite of electrical calculation tools for professionals, offering NEC-compliant solutions for wire sizing, voltage drop, and more. It works offline and allows for PDF export of results with custom branding.

Highlights
  • NEC-compliant electrical calculators
  • Offline functionality
  • Voltage drop calculations
  • Ampacity and wire sizing
  • PDF export with branding
  • Calculation history
  • Siri Shortcuts integration
Features
Read full description

Every answer names the code table it came from — 310.16, Chapter 9, 250.122, Article 220 — so you can check it, cite it to an inspector, and learn it. That is the whole point. 20 calculators and a full panel planner. All of it works with no signal, in a basement, on a roof, in a crawlspace. PANEL PLANNER + PANEL SCHEDULE Lay out the actual board on screen. Drag breakers, GFCI/AFCI devices, busbars and terminals onto the rail, wire them up, name every circuit. Then export a PDF with your logo: panel schedule, board drawing and a parts list, ready to hand over. NO ACCOUNT, NO ADS - VOLTAGE DROP — branch and feeder circuits, instant 3%/5% check - AMPACITY — NEC Table 310.16 lookup, every size and insulation type - GROUND WIRE — equipment grounding conductor per 250.122 - OHM'S LAW and POWER TRIANGLE - THREE PHASE - PANEL PLANNER — free to enter and draw, core devices included MORE CALCULATORS - WIRE SIZING — the right conductor for the circuit, accounting for ampacity and temperature - CONDUIT FILL — EMT, IMC, RMC, PVC and flexible raceway - CONDUIT BENDING — 9 bend types (90°, offset, 3- and 4-point saddle, rolling offset, concentric, back-to-back, parallel offsets, matching centers), bender presets and an on-screen level - BOX FILL — junction box sizing per 314.16 - DWELLING LOAD — service sizing per Article 220 - NON-DWELLING DEMAND — commercial load calculation - SERVICE ENTRANCE — service and feeder sizing - GROUNDING ELECTRODE — per 250.66 - DERATING — temperature and conduit-fill factors - MOTOR — branch circuit protection per Article 430 - TRANSFORMER — overcurrent protection per Article 450 - FAULT CURRENT — available short-circuit current - EV CHARGER — EVSE branch circuit and load - SELECTIVITY — protective device coordination FOUR CODES, ONE APP NEC 2023 and 2026 - CEC 2024 (CSA C22.1) - BS 7671 - DIN VDE 0100. The app picks the right one for your region, and you can switch any time. Nobody else carries all four. PAY ONCE IF YOU WANT TO Every calculator gives you one free visit first, so you can check the math against your own book before you decide. Then choose a one-time Lifetime purchase and never see a subscription again — or pay yearly or monthly if you prefer. BUILT FOR THE TRUCK, NOT THE OFFICE - 100% offline. No internet, no account, no sign-up. - No ads. No tracking. No data collected. - PDF reports with your company logo and license number, US Letter or A4 - History with job names, side-by-side comparison, Siri Shortcuts, Home Screen widget Not affiliated with, endorsed by, or sponsored by the NFPA, CSA Group or the IET. NEC and National Electrical Code are registered trademarks of the National Fire Protection Association, Inc. Always verify against the adopted code edition in your jurisdiction. Terms: https://laborsam.com/apps/electric-master/terms Privacy: https://laborsam.com/apps/electric-master/privacy

Screenshots

OCS2 screens
Electric Master4 screens

Verdict

The call

The clearest difference is in-app purchases: OCS at none against Electric Master's 3. OCS also leads on iOS requirement (15.6 vs 17.0). Electric Master's advantage is update cadence (every 2 weeks vs every 6 months). On price, ads 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. Electric Master sells 3 in-app purchases, starting at $9.99 per month. OCS asks for nothing beyond the download.

UpkeepUpdate frequency

OCS ships an update every 6 months, Electric Master every 2 weeks. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 6 level
OCS versus Electric Master: the parameters behind the verdict, then further details
ParameterOCSElectric Master
PriceFreeFree
Rating—3.6 (5 ratings) — better
Number of ratings—5 — better
Update frequencyEvery 6 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size27 MB72 MB
Age rating4+4+
DeveloperOjmar Intelligent Locking SystemsYusuf Can Samiloglu

In-app purchases

None

OCS

No in-app purchases

3 purchases

Electric Master

Subscriptions2
  • Pro Monthly — All Calculators$9.991 Month
  • Pro Yearly — All Calculators$59.991 Year
One-time1
  • Pro Lifetime — All Calculators$119.99

Questions

Is OCS free?
OCS is free to download, with no in-app purchases.
Is Electric Master free?
Electric Master is free to download, with in-app purchases available.
Do OCS or Electric Master have ads?
Neither OCS nor Electric Master shows ads.
Which is updated more often, OCS or Electric Master?
OCS ships an update every 6 months, and Electric Master every 2 weeks. Most recently, OCS was updated on October 16, 2026 and Electric Master on October 24, 2026.

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