# Watts vs ECO

The clearest difference is update cadence: Watts at every 4 months against ECO's every 36 months. Watts also leads on device support (3 vs 1) and iOS requirement (8.0 vs 16.2). 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.

Watts ships an update every 4 months, ECO every 36 months. The most recent releases landed on October 2, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Watts | ECO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/watts/id958596712/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 36 months |
| Monetization | Free | — |
| Size | 1 MB | 0 MB |
| Requires iOS | **8.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Code Smart LLC](https://appshunter.io/developer/460440673) | [Toscano Linea Electronica SL](https://appshunter.io/developer/1170172273) |

## What reviewers say

### Watts

[App page](https://appshunter.io/ios/app/watts/id958596712)

Calculate the cost of running electrical devices over time. This simple tool helps you understand your energy consumption expenses.

**Highlights:** Calculate device running costs, Easy to use interface, Track energy expenses over time, Simple utility tool

**Features:** macOS Compatibility

**In-app purchases:** none


### ECO

[App page](https://appshunter.io/ios/app/eco-dc/id6450993703)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Watts free?

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

### Is ECO free?

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

### Do Watts or ECO have ads?

Neither Watts nor ECO shows ads.

### Which is updated more often, Watts or ECO?

Watts ships an update every 4 months, and ECO every 36 months. Most recently, Watts was updated on October 2, 2026 and ECO on October 8, 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.*