# Voltha vs Raystech Energy

The clearest difference is update cadence: Voltha at every 3 weeks against Raystech Energy's every 2 months. Voltha also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

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

Voltha ships an update every 3 weeks, Raystech Energy every 2 months. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Voltha | Raystech Energy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 71 MB | 53 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Aton Green Energy](https://appshunter.io/developer/1694319000) | [寿杰 张](https://appshunter.io/developer/1745989953) |

## What reviewers say

### Voltha

[App page](https://appshunter.io/ios/app/voltha/id6450677261)

**Features:** macOS Compatibility

**In-app purchases:** none


### Raystech Energy

[App page](https://appshunter.io/ios/app/raystech-energy/id6502583241)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Voltha free?

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

### Is Raystech Energy free?

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

### Do Voltha or Raystech Energy have ads?

Neither Voltha nor Raystech Energy shows ads.

### Which is updated more often, Voltha or Raystech Energy?

Voltha ships an update every 3 weeks, and Raystech Energy every 2 months. Most recently, Voltha was updated on October 18, 2026 and Raystech Energy on October 7, 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.*