# field vs MasterElec

The clearest difference is in-app purchases: field at none against MasterElec's 2. field also leads on update cadence (monthly vs every 3 months). MasterElec's advantage is iOS requirement (17.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. MasterElec sells 2 in-app purchases, starting at $4.99 per 7 days. field asks for nothing beyond the download.

field ships an update monthly, MasterElec every 3 months. The most recent releases landed on October 1, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | field | MasterElec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/masterelec-nec-code-guide/id6760912109/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | — | Freemium |
| Size | 15 MB | 28 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Evan Trafton](https://appshunter.io/developer/1877188601) | [TWOSCRIPTS LABS INC.](https://appshunter.io/developer/1861222980) |

## What reviewers say

### field

[App page](https://appshunter.io/ios/app/field-vision/id6759178069)

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

**In-app purchases:** none


### MasterElec

[App page](https://appshunter.io/ios/app/masterelec-nec-code-guide/id6760912109)

A voice-powered assistant for electricians that provides offline access to NEC references and professional calculators. Quickly get answers to code questions and perform calculations without needing an internet connection.

**Highlights:** Voice-first interface for queries, 100% offline functionality, NEC reference access, Professional electrical calculators, Bookmark and export calculations, Free daily voice queries

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Susbcription | $4.99 | per 7 days |
| Annual Subscription | $39.99 | per year |


## Frequently asked questions

### Is field free?

field is free to download, with no in-app purchases.

### Is MasterElec free?

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

### Do field or MasterElec have ads?

Neither field nor MasterElec shows ads.

### Which is updated more often, field or MasterElec?

field ships an update monthly, and MasterElec every 3 months. Most recently, field was updated on October 1, 2026 and MasterElec on October 10, 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.*