Power Calculator vs Breaker Box
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Power Calculator
This app provides a straightforward calculator designed for the electrical industry, offering tools for power and lighting calculations. It helps users determine generator and UPS requirements, convert units, and calculate fuel consumption. Suitable for both professionals and casual users needing electrical calculations.
- KW, kVA, and Amps calculation
- Generator requirements calculation (single/three phase)
- UPS requirements calculation (single/three phase)
- Lumens and Watts conversion
- Generator fuel consumption calculation
- Generator power calculation
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A simple no fuss calculator for electrical industry professionals & casual users alike. Incorporates a range of electrical power & lighting calculators: • KW and kVA and Amps • Calculate generator requirements (single or three phase) • Calculate UPS requirements (single or three phase) • Convert Lumens & Watts • Generator Fuel Consumption • Generator Power Calculator
Breaker Box
Easily label and document every circuit in your electrical panel. Assign notes, rooms, and fixtures to breakers, and generate printable PDF legends for quick identification. Supports multi-panel management and cloud sync for data safety.
- Label circuits with notes, rooms, and fixtures
- Supports tandem splits, multi-pole, GFCI, and HACR
- Organize circuits by room and linked fixtures
- Generate printable PDF legends for panels
- Manage multiple panels and properties
- Cloud sync and automatic backups
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Stop guessing which breaker controls what. Whether you're a homeowner mapping a single panel or an electrician documenting multiple buildings, Breaker Box gives you a complete directory for every circuit — and lets you print a professional legend to match. LABEL EVERY CIRCUIT Assign notes, rooms, and fixtures to each breaker. Tandem splits, multi-pole circuits, GFCI outlets, and HACR systems all supported. Track wire gauge and size. Use custom phase colors for 1-, 2-, and 3-phase panels. ORGANIZE BY ROOM Link circuits to the rooms and fixtures they control — so you always know which breaker to flip, in seconds. PDF LEGENDS Export to PDF, sized to fit a panel sleeve or tape to the door. Adjust font scale per label for a professional result. MULTI-PANEL SUPPORT Manage multiple panels across one or more properties. Link breakers to sub-panels. PRO FEATURES • Unlimited panels • PDF export with custom print sizes • Cloud sync across all your devices • Custom fixture types and unlimited rooms • Import and export for client handoffs and device transfers BACKUP & RESTORE Automatic backups and cloud management keep your data safe. Every circuit, documented.
Screenshots
Verdict
The clearest difference is in-app purchases: Power Calculator at none against Breaker Box's 1. Breaker Box's advantage is update cadence (every 9 days vs every 2 months) and ratings volume (108 vs 2). On price, rating, review sentiment and ads 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
Both are free to download. Breaker Box sells 1 one-off in-app purchase. Power Calculator asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.5 for Power Calculator against 4.5 for Breaker Box. That said, the two scores are not equally well evidenced: Breaker Box has 108 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 81% of Power Calculator's written reviews are positive against 78% of Breaker Box's.
Power Calculator ships an update every 2 months, Breaker Box every 9 days. Both last shipped on November 6, 2026.
| Parameter | Power Calculator | Breaker Box |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | 4.5 (108 ratings) |
| Positive reviews | 81.0% of reviews — better | 77.8% of reviews |
| Number of ratings | 2 | 108 — better |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | Power Continuity Limited | Brett Pappas |
Customer experience
Power Calculator
Breaker Box
In-app purchases
Power Calculator
No in-app purchases
Breaker Box
- Lifetime Pro License$9.99
Questions
Is Power Calculator free?
Is Breaker Box free?
Which has better reviews, Power Calculator or Breaker Box?
Do Power Calculator or Breaker Box have ads?
Which is updated more often, Power Calculator or Breaker Box?
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