# Folder Lock Pro vs Voltage Drop & Wire Size

The clearest difference is price: Voltage Drop & Wire Size at Free against Folder Lock Pro's $3.99. Voltage Drop & Wire Size also leads on rating (5.0 vs 3.8) and ads (none vs shown). Folder Lock Pro's advantage is in-app purchases (none vs 1) and ratings volume (24 vs 1).

Voltage Drop & Wire Size is free to download; Folder Lock Pro costs $3.99 up front. Voltage Drop & Wire Size sells 1 one-off in-app purchase. Folder Lock Pro asks for nothing beyond the download.

Voltage Drop & Wire Size holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Folder Lock Pro has 24 ratings behind it against 1, so its average is the more settled of the two.

Folder Lock Pro ships an update every 6 months, Voltage Drop & Wire Size every 2 weeks. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Folder Lock Pro | Voltage Drop & Wire Size |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.8 (24 ratings)](https://appshunter.io/ios/app/folder-lock-pro/id983498115/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/voltage-drop-and-wire-size/id6762137454/reviews)** |
| Number of ratings | **24** | 1 |
| Positive reviews | 31.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Size | 46 MB | 2 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NewSoftwares.net](https://appshunter.io/developer/372925920) | [Alona Nesterenko](https://appshunter.io/developer/1890650834) |

## What reviewers say

### Folder Lock Pro

[App page](https://appshunter.io/ios/app/folder-lock-pro/id983498115)

Securely protect your private files, photos, videos, and documents with password protection. Wirelessly transfer files to and from your PC or Mac, and manage music without iTunes. Features include a secure browser, wallet card storage, and advanced security options like decoy passwords and login attempt logging.

**Highlights:** Password-protect files, photos, and videos, Wireless file transfer to PC/Mac, Secure browser with no trace, Store wallet cards securely, Decoy password and login attempt logging, Support for various document, picture, video, audio, and archive formats

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Folder Lock Pro free?

Folder Lock Pro costs $3.99, with no in-app purchases.

### Is Voltage Drop & Wire Size free?

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

### Which has better reviews, Folder Lock Pro or Voltage Drop & Wire Size?

Voltage Drop & Wire Size is rated higher. Folder Lock Pro averages 3.8 out of 5 from 24 ratings, while Voltage Drop & Wire Size averages 5.0 from 1 ratings.

### Do Folder Lock Pro or Voltage Drop & Wire Size have ads?

Folder Lock Pro shows ads; Voltage Drop & Wire Size does not.

### Which is updated more often, Folder Lock Pro or Voltage Drop & Wire Size?

Folder Lock Pro ships an update every 6 months, and Voltage Drop & Wire Size every 2 weeks. Most recently, Folder Lock Pro was updated on October 16, 2026 and Voltage Drop & Wire Size 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.*