# WATTS Battery vs ETM TEC

The clearest difference is iOS requirement: ETM TEC at 9.3 against WATTS Battery's 13.0. 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.

## The numbers

| Metric | WATTS Battery | ETM TEC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/watts-battery/id1438346091/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free | — |
| Size | 26 MB | 2 MB |
| Requires iOS | 13.0 | **9.3** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Uatts Beteri, OOO](https://appshunter.io/developer/1438346090) | [SHENZHEN SMARTEC TECHNOLOGY COMPANY LIMITED](https://appshunter.io/developer/1190436409) |

## What reviewers say

### WATTS Battery

[App page](https://appshunter.io/ios/app/watts-battery/id1438346091)

This application enables communication with a smart, portable energy storage module. It allows users to store solar energy and utilize it when needed, serving as an alternative to generators or an intelligent home energy management system.

**Highlights:** Communicate with WattsBattery module, Store and manage solar energy, Alternative to gasoline generators, Intelligent home energy management, Modular energy storage system

**Features:** macOS Compatibility

**In-app purchases:** none


### ETM TEC

[App page](https://appshunter.io/ios/app/etm-tec/id1561301041)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WATTS Battery free?

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

### Is ETM TEC free?

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

### Do WATTS Battery or ETM TEC have ads?

Neither WATTS Battery nor ETM TEC shows ads.

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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.*