Dri vs E3 Drying
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dri
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.
- Calculate grains per pound (GPP)
- Calculate vapor pressure
- Calculate air dew point to material
- Switch between F° and C°
- Easy-access term definitions
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Calculate drying environment variables quickly and easily with this all-new psychrometric calculator. Just enter temperature and relative humidity and it will instantly calculate grains per pound (GPP). Or use the Advanced section to calculate vapor pressure and air dew point to material. Switch between F° and C° modes. Features easy-access definitions for all terms.
E3 Drying
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.
- 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
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This app is built for all levels of restorers in the water mitigation industry. For the first time ever these proprietary algorithms and metrics will give the restorer complete control of their drying chamber regardless of the size, class, equipment used or outside conditions instead of the restorer being controlled by their chamber. The keystone metric for this app is the patent pending E3 metric that can evaluate the exact evaporation ability of any condition in a drying chamber and the daily E3 targets that have been set for all different types of drying equipment for all possible water classes and outside conditions. This metric also allows for all different types of equipment to be specifically ranked or compared to prove which is the best for any job scenario.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Dri | E3 Drying |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (12 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 62.5% of reviews | — |
| Number of ratings | 12 — better | 10 |
| Update frequency | Every 13 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Legend Brands | Scott Dewald |
Customer experience
Dri
E3 Drying
In-app purchases
Dri
No in-app purchases
E3 Drying
No in-app purchases
