# Voltage Drop Pro vs Conduit Fill

The clearest difference is update cadence: Voltage Drop Pro at every 2 months against Conduit Fill's every 5 months. Voltage Drop Pro also leads on price ($3.99 vs $4.99). Conduit Fill's advantage is device support (4 vs 2) and iOS requirement (12.0 vs 17.5). On ads and in-app purchases there is nothing between them.

Voltage Drop Pro costs $3.99 and Conduit Fill $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Voltage Drop Pro ships an update every 2 months, Conduit Fill every 5 months. The most recent releases landed on July 9, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Voltage Drop Pro | Conduit Fill |
| --- | --- | --- |
| Price | **$3.99** | $4.99 |
| Rating | — | **[3.3 (3 ratings)](https://appshunter.io/ios/app/conduit-fill/id6469908455/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | — | Paid |
| Size | 15 MB | 23 MB |
| Requires iOS | 17.5 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [Martin Loch](https://appshunter.io/developer/1385872283) |

## What reviewers say

### Voltage Drop Pro

[App page](https://appshunter.io/ios/app/voltage-drop-pro/id1601052433)

**Features:** macOS Compatibility

**In-app purchases:** none


### Conduit Fill

[App page](https://appshunter.io/ios/app/conduit-fill/id6469908455)

This app helps electricians quickly calculate conduit fill based on the latest NEC or CEC codes. Easily add various wire types and quantities to determine the minimum required conduit size.

**Highlights:** NEC and CEC code calculations, Support for up to 1000 wires, Select from different wire types, Instant calculation for all conduit sizes, Minimized display for most common sizes

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Drop Pro free?

Voltage Drop Pro costs $3.99, with no in-app purchases.

### Is Conduit Fill free?

Conduit Fill costs $4.99, with no in-app purchases.

### Do Voltage Drop Pro or Conduit Fill have ads?

Neither Voltage Drop Pro nor Conduit Fill shows ads.

### Which is updated more often, Voltage Drop Pro or Conduit Fill?

Voltage Drop Pro ships an update every 2 months, and Conduit Fill every 5 months. Most recently, Voltage Drop Pro was updated on July 9, 2026 and Conduit Fill on September 6, 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.*