# NEC Load Calculator vs Centrd

The clearest difference is update cadence: Centrd at every 10 days against NEC Load Calculator's every 3 weeks. Centrd also leads on iOS requirement (16.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. NEC Load Calculator sells 1 one-off in-app purchase and Centrd sells 5 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

NEC Load Calculator ships an update every 3 weeks, Centrd every 10 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | NEC Load Calculator | Centrd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nec-load-calculator/id6785889421/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 12 MB | 53 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Justin Logan](https://appshunter.io/developer/6788557488) |

## What reviewers say

### NEC Load Calculator

[App page](https://appshunter.io/ios/app/nec-load-calculator/id6785889421)

This app performs electrical load calculations based on the NEC 2023 code. It offers modules for residential, commercial, motor, and branch circuit calculations, along with panel scheduling and PDF export. Designed for licensed electricians and contractors.

**Highlights:** NEC 2023 load calculations, Residential, commercial, motor, branch circuit modules, Panel schedule editor, Step-by-step calculation results, Panel layout generation, PDF export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NEC LOAD PRO | $7.99 | one-time |


### Centrd

[App page](https://appshunter.io/ios/app/centrd-card-centering-tool/id6788557486)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Centrd Premium | $3.99 | per month |
| Centrd Premium (Yearly) | $29.99 | per year |
| Supporter | $1.99 | one-time |
| Big supporter | $4.99 | one-time |
| Generous supporter | $9.99 | one-time |


## Frequently asked questions

### Is NEC Load Calculator free?

NEC Load Calculator is free to download, with in-app purchases available.

### Is Centrd free?

Centrd is free to download, with in-app purchases available.

### Do NEC Load Calculator or Centrd have ads?

Neither NEC Load Calculator nor Centrd shows ads.

### Which is updated more often, NEC Load Calculator or Centrd?

NEC Load Calculator ships an update every 3 weeks, and Centrd every 10 days. Most recently, NEC Load Calculator was updated on October 19, 2026 and Centrd on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*