# Ethr Preview vs Construction Calc

The clearest difference is in-app purchases: Ethr Preview at none against Construction Calc's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Construction Calc sells 1 one-off in-app purchase. Ethr Preview asks for nothing beyond the download.

## The numbers

| Metric | Ethr Preview | Construction Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/construction-calc-estimator/id6755724882/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Monetization | — | Free |
| Size | 63 MB | 3 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [VentureDive](https://appshunter.io/developer/439880351) | [Konstantin Khoroshun](https://appshunter.io/developer/1476700024) |

## What reviewers say

### Ethr Preview

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Construction Calc

[App page](https://appshunter.io/ios/app/construction-calc-estimator/id6755724882)

This offline calculator helps construction professionals and DIYers quickly estimate materials for various projects. It supports imperial and metric units, and all calculations are stored locally for privacy.  No internet connection is required.

**Highlights:** Offline material estimation, Calculates 8 key materials, Feet-Inch-Fraction input, Imperial & Metric units, Local data storage, No subscriptions or ads

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features | $0.99 | one-time |


## Frequently asked questions

### Is Ethr Preview free?

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

### Is Construction Calc free?

Construction Calc is free to download, with in-app purchases available.

### Do Ethr Preview or Construction Calc have ads?

Neither Ethr Preview nor Construction Calc 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.*