# iHarmonizer vs Construction Calculator

The clearest difference is iOS requirement: iHarmonizer at 13.0 against Construction Calculator's 16.4. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. iHarmonizer sells 5 one-off in-app purchases and Construction Calculator sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | iHarmonizer | Construction Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iharmonizer/id488536254/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 98 MB | 60 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Manufacturing Laboratories, Inc.](https://appshunter.io/developer/488536257) | [Reliqe LLC](https://appshunter.io/developer/1895666360) |

## What reviewers say

### iHarmonizer

[App page](https://appshunter.io/ios/app/iharmonizer/id488536254)

Record machining noise, save files, and send for free evaluation. An in-app purchase allows for immediate, on-site analysis to detect chatter and suggest optimal spindle speeds.

**Highlights:** Record machining noise, Save audio files, Free MLI evaluation, In-app purchase for immediate analysis, Chatter detection, Suggests alternate spindle speeds, Indicates no stable spindle speed

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Regulations 10 Pack | $24.99 | one-time |
| Regulations 50 Pack | $99.99 | one-time |
| Regulations 100 Pack | $99.99 | one-time |
| Regulations 200 Pack | $299.99 | one-time |
| Regulations 500 Pack | $299.99 | one-time |


### Construction Calculator

[App page](https://appshunter.io/ios/app/construction-calculator-plumb/id6790056186)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plumb Pro (launch price) | $9.99 | one-time |
| Plumb Pro | $14.99 | one-time |


## Frequently asked questions

### Is iHarmonizer free?

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

### Is Construction Calculator free?

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

### Do iHarmonizer or Construction Calculator have ads?

Neither iHarmonizer nor Construction Calculator 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.*