# Austa Solar vs Eco

The clearest difference is update cadence: Eco at every 2 weeks against Austa Solar's every 8 months. 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.

Austa Solar ships an update every 8 months, Eco every 2 weeks. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Austa Solar | Eco |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Size | 66 MB | 22 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ningbo Osda Solar Co., Ltd.](https://appshunter.io/developer/1696929762) | [Ecowatt Technologies, Inc.](https://appshunter.io/developer/1851654926) |

## What reviewers say

### Austa Solar

[App page](https://appshunter.io/ios/app/austa-solar/id6451139834)

**In-app purchases:** none


### Eco

[App page](https://appshunter.io/ios/app/eco-watt/id6755060477)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Austa Solar free?

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

### Is Eco free?

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

### Do Austa Solar or Eco have ads?

Neither Austa Solar nor Eco shows ads.

### Which is updated more often, Austa Solar or Eco?

Austa Solar ships an update every 8 months, and Eco every 2 weeks. Most recently, Austa Solar was updated on September 8, 2026 and Eco on September 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.*