PRO vs E3 Drying
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PRO
Access comprehensive laboratory testing for environmental pollutants like mold, radon, and lead. This service is backed by certified professionals and offers simplified processing with bundled supplies and analysis fees.
- Mold testing
- Radon testing
- Lead testing
- Allergen testing
- Asbestos testing
- Drinking water analysis
- Certified professionals
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PRO-LAB® offers laboratory testing services for mold, radon, lead, allergen, asbestos, and drinking water pollutants. Staffed with Certified Indoor Air Quality Professionals, Radon Measurement Specialists, Chemists, PRO-LAB® has the knowledge and experience to assist in any environmental investigations. PRO-LAB® is the first laboratory to offer all lab supplies bundled together with the lab analysis fees for simplified processing.
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 ratings volume: PRO at 107 against E3 Drying's 10. E3 Drying's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, rating, update cadence and ads 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.
On the App Store both sit at effectively the same score — 4.9 for PRO against 5.0 for E3 Drying. That said, the two scores are not equally well evidenced: PRO has 107 ratings behind it against 10, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.
| Parameter | PRO | E3 Drying |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (107 ratings) | 5.0 (10 ratings) — better |
| Positive reviews | 30.0% of reviews | — |
| Number of ratings | 107 — better | 10 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Professional Laboratories | Scott Dewald |
Customer experience
PRO
E3 Drying
In-app purchases
PRO
No in-app purchases
E3 Drying
No in-app purchases
