# Volta Power USA vs Shellie

The clearest difference is update cadence: Shellie at every 2 days against Volta Power USA's every 15 months. Volta Power USA's advantage is iOS requirement (11.0 vs 18.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Volta Power USA ships an update every 15 months, Shellie every 2 days. The most recent releases landed on September 20, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Volta Power USA | Shellie |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shellie/id6753881676/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 73 MB | 3 MB |
| Requires iOS | **11.0** | 18.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Nprc TV LLC](https://appshunter.io/developer/1625759668) | [Peter Walker](https://appshunter.io/developer/1845456015) |

## What reviewers say

### Volta Power USA

[App page](https://appshunter.io/ios/app/volta-power-usa/id6630366386)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shellie

[App page](https://appshunter.io/ios/app/shellie/id6753881676)

This utility app assists RV owners in leveling their vehicles. It provides a simple interface to ensure your RV is perfectly balanced for comfort and stability.

**Highlights:** RV leveling assistance, Vehicle balancing, Simple interface, Designed for Winnebago Travato

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Volta Power USA free?

Volta Power USA is free to download, with no in-app purchases.

### Is Shellie free?

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

### Do Volta Power USA or Shellie have ads?

Neither Volta Power USA nor Shellie shows ads.

### Which is updated more often, Volta Power USA or Shellie?

Volta Power USA ships an update every 15 months, and Shellie every 2 days. Most recently, Volta Power USA was updated on September 20, 2026 and Shellie on June 1, 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.*