# Phymetrix Calculator vs Megatuner Plus

The clearest difference is in-app purchases: Phymetrix Calculator at none against Megatuner Plus's 2. Phymetrix Calculator also leads on iOS requirement (14.0 vs 16.0). Megatuner Plus's advantage is update cadence (every 5 weeks vs every 52 months). On price, ads and device support there is nothing between them.

Both are free to download. Megatuner Plus sells 2 in-app purchases, starting at $4.49 per month. Phymetrix Calculator asks for nothing beyond the download.

Phymetrix Calculator ships an update every 52 months, Megatuner Plus every 5 weeks. The most recent releases landed on June 10, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Phymetrix Calculator | Megatuner Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/phymetrix-calculator/id1073762645/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 1 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Alexander Bedrossian](https://appshunter.io/developer/674267968) | [Christer Dalen](https://appshunter.io/developer/1655576002) |

## What reviewers say

### Phymetrix Calculator

[App page](https://appshunter.io/ios/app/phymetrix-calculator/id1073762645)

This utility app simplifies moisture calculations by converting between various units and determining dew points and partial water vapor pressures. It's pre-programmed with essential scientific equations for common gases, making complex calculations straightforward.

**Highlights:** Moisture unit conversion, Dew point calculation, Partial water vapor pressure calculation, Pre-programmed scientific equations, Supports common gases, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Megatuner Plus

[App page](https://appshunter.io/ios/app/megatuner-plus/id1665781784)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Megatuner_Mimo Full | $4.49 | per month |
| Megatuner_Mimo Full | $44.90 | per year |


## Frequently asked questions

### Is Phymetrix Calculator free?

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

### Is Megatuner Plus free?

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

### Do Phymetrix Calculator or Megatuner Plus have ads?

Neither Phymetrix Calculator nor Megatuner Plus shows ads.

### Which is updated more often, Phymetrix Calculator or Megatuner Plus?

Phymetrix Calculator ships an update every 52 months, and Megatuner Plus every 5 weeks. Most recently, Phymetrix Calculator was updated on June 10, 2026 and Megatuner Plus on September 15, 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.*