# ETi vs Pyramid Solar

The clearest difference is update cadence: ETi at every 2 months against Pyramid Solar's every 4 months. Pyramid Solar's advantage is iOS requirement (12.0 vs 15.0). 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.

ETi ships an update every 2 months, Pyramid Solar every 4 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | ETi | Pyramid Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 94 MB | 26 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EnerMAN Technologies Private Limited](https://appshunter.io/developer/1234185464) | [Pyramid Electronics](https://appshunter.io/developer/1567729808) |

## What reviewers say

### ETi

[App page](https://appshunter.io/ios/app/eti-sol/id1528670740)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pyramid Solar

[App page](https://appshunter.io/ios/app/pyramid-solar/id1567729806)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ETi free?

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

### Is Pyramid Solar free?

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

### Do ETi or Pyramid Solar have ads?

Neither ETi nor Pyramid Solar shows ads.

### Which is updated more often, ETi or Pyramid Solar?

ETi ships an update every 2 months, and Pyramid Solar every 4 months. Most recently, ETi was updated on November 3, 2026 and Pyramid Solar on November 3, 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.*