# Wattson vs NEC Load Calculator

The clearest difference is update cadence: Wattson at every 5 days against NEC Load Calculator's every 3 weeks. Wattson 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. Wattson sells 1 one-off in-app purchase and NEC Load Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Wattson ships an update every 5 days, NEC Load Calculator every 3 weeks. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Wattson | NEC Load Calculator |
| --- | --- | --- |
| 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 5 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 44 MB | 12 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Marin Martinovic](https://appshunter.io/developer/1871459610) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### Wattson

[App page](https://appshunter.io/ios/app/wattson-electrical-calculator/id6760766587)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wattson Pro | $5.99 | one-time |


### 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 |


## Frequently asked questions

### Is Wattson free?

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

### Is NEC Load Calculator free?

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

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

Neither Wattson nor NEC Load Calculator shows ads.

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

Wattson ships an update every 5 days, and NEC Load Calculator every 3 weeks. Most recently, Wattson was updated on October 31, 2026 and NEC Load Calculator on November 4, 2026.

---

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