# E3 Drying vs Kahi Field App

The clearest difference is device support: E3 Drying at 3 against Kahi Field App's 1. E3 Drying also leads on iOS requirement (12.0 vs 18.0). On price, update cadence, 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 ships an update every 3 weeks, Kahi Field App every 5 weeks. The most recent releases landed on June 4, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | E3 Drying | Kahi Field App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/e3-drying/id1513574356/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free | — |
| Size | 68 MB | 23 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Scott Dewald](https://appshunter.io/developer/1513574355) | [Kahi Inc.](https://appshunter.io/developer/1536285584) |

## What reviewers say

### 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


### Kahi Field App

[App page](https://appshunter.io/ios/app/kahi-field-app/id6745899195)

**In-app purchases:** none


## Frequently asked questions

### Is E3 Drying free?

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

### Is Kahi Field App free?

Kahi Field App is free to download, with no in-app purchases.

### Do E3 Drying or Kahi Field App have ads?

Neither E3 Drying nor Kahi Field App shows ads.

### Which is updated more often, E3 Drying or Kahi Field App?

E3 Drying ships an update every 3 weeks, and Kahi Field App every 5 weeks. Most recently, E3 Drying was updated on June 4, 2026 and Kahi Field App on September 13, 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.*