# NAO Logger vs Ethr Preview

The clearest difference is iOS requirement: NAO Logger at 12.0 against Ethr Preview's 15.1. 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 | NAO Logger | Ethr Preview |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nao-logger/id799528705/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free | — |
| Size | 26 MB | 63 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Pole Star SA](https://appshunter.io/developer/799528708) | [VentureDive](https://appshunter.io/developer/439880351) |

## What reviewers say

### NAO Logger

[App page](https://appshunter.io/ios/app/nao-logger/id799528705)

This app enables indoor location setup using Bluetooth beacons and advanced sensors. It allows users to track their location with bearing and accuracy on a map. Requires a free Pole Star partner account to use.

**Highlights:** Indoor location setup, Bluetooth Low Energy beacons, Advanced sensors fusion, Real-time location tracking, Bearing and accuracy display, Map visualization

**Features:** macOS Compatibility

**In-app purchases:** none


### Ethr Preview

[App page](https://appshunter.io/ios/app/ethr-preview/id6742777779)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NAO Logger free?

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

### Is Ethr Preview free?

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

### Do NAO Logger or Ethr Preview have ads?

Neither NAO Logger nor Ethr Preview 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.*