# Dri vs E3 Drying

The clearest difference is rating: E3 Drying at 5.0 against Dri's 3.6. E3 Drying also leads on update cadence (every 3 weeks vs every 13 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

E3 Drying holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 12 and 10 respectively.

Dri ships an update every 13 months, E3 Drying every 3 weeks. The most recent releases landed on June 1, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Dri | E3 Drying |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (12 ratings)](https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/e3-drying/id1513574356/reviews)** |
| Number of ratings | **12** | 10 |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 4 MB | 68 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Legend Brands](https://appshunter.io/developer/484266599) | [Scott Dewald](https://appshunter.io/developer/1513574355) |

## What reviewers say

### Dri

[App page](https://appshunter.io/ios/app/dri-eaz-psychrometric-calc/id484266596)

This utility app calculates essential drying environment variables. Input temperature and relative humidity to instantly get grains per pound (GPP). Advanced options allow calculation of vapor pressure and air dew point to material, with easy term definitions.

**Highlights:** Calculate grains per pound (GPP), Calculate vapor pressure, Calculate air dew point to material, Switch between F° and C°, Easy-access term definitions

**Features:** macOS Compatibility

**In-app purchases:** none


### E3 Drying

[App page](https://appshunter.io/ios/app/e3-drying/id1513574356)

This utility app provides water mitigation professionals with proprietary algorithms and metrics to precisely control drying chambers. It introduces a patent-pending E3 metric to evaluate evaporation ability and set daily targets, allowing for optimized equipment selection and performance comparison.

**Highlights:** Proprietary algorithms for drying chamber control, Patent-pending E3 metric for evaporation evaluation, Daily E3 targets for various equipment and conditions, Equipment ranking and comparison, Control regardless of chamber size or outside conditions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dri free?

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

### Is E3 Drying free?

E3 Drying is free to download, with no in-app purchases.

### Which has better reviews, Dri or E3 Drying?

E3 Drying is rated higher. Dri averages 3.6 out of 5 from 12 ratings, while E3 Drying averages 5.0 from 10 ratings.

### Do Dri or E3 Drying have ads?

Neither Dri nor E3 Drying shows ads.

### Which is updated more often, Dri or E3 Drying?

Dri ships an update every 13 months, and E3 Drying every 3 weeks. Most recently, Dri was updated on June 1, 2026 and E3 Drying on June 4, 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.*