# Voltage Drop & Wire Size vs EYN Tools

The clearest difference is iOS requirement: Voltage Drop & Wire Size at 18.0 against EYN Tools's 26.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Voltage Drop & Wire Size sells 1 one-off in-app purchase and EYN Tools sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Voltage Drop & Wire Size | EYN Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/voltage-drop-and-wire-size/id6762137454/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 2 MB | 19 MB |
| Requires iOS | **18.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Alona Nesterenko](https://appshunter.io/developer/1890650834) | [Luke Gatz](https://appshunter.io/developer/1894551599) |

## What reviewers say

### Voltage Drop & Wire Size

[App page](https://appshunter.io/ios/app/voltage-drop-and-wire-size/id6762137454)

Calculate voltage drop and size wires for electrical projects. Evaluate existing conductors or find the optimal size for your needs. Supports various electrical systems and international standards.

**Highlights:** Voltage drop calculation, Wire sizing, NEC/AWG and Metric support, Ampacity calculations, Save and reopen calculations, Adjustable temperature units

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $1.99 | one-time |


### EYN Tools

[App page](https://appshunter.io/ios/app/eyn-tools/id6762532138)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Yearly Pro Plan | $29.99 | per year |
| Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Voltage Drop & Wire Size free?

Voltage Drop & Wire Size is free to download, with in-app purchases available.

### Is EYN Tools free?

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

### Do Voltage Drop & Wire Size or EYN Tools have ads?

Neither Voltage Drop & Wire Size nor EYN Tools shows ads.

### Which is updated more often, Voltage Drop & Wire Size or EYN Tools?

Voltage Drop & Wire Size ships an update every 2 weeks, and EYN Tools every 2 weeks. Most recently, Voltage Drop & Wire Size was updated on October 5, 2026 and EYN Tools on October 2, 2026.

---

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