# Stealth Hydro Data vs DR Chemical

The clearest difference is update cadence: DR Chemical at every 2 weeks against Stealth Hydro Data's every 41 months. Stealth Hydro Data's advantage is iOS requirement (12.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Stealth Hydro Data ships an update every 41 months, DR Chemical every 2 weeks. The most recent releases landed on October 18, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Stealth Hydro Data | DR Chemical |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/dr-chemical/id1607536148/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 8 MB | 36 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [JM Test Systems Inc.](https://appshunter.io/developer/1477078443) | [GROUP M7, INC.](https://appshunter.io/developer/1607536150) |

## What reviewers say

### Stealth Hydro Data

[App page](https://appshunter.io/ios/app/stealth-hydro-data/id1492354898)

**Features:** macOS Compatibility

**In-app purchases:** none


### DR Chemical

[App page](https://appshunter.io/ios/app/dr-chemical/id1607536148)

This reference guide provides essential information, formulas, and calculators for HDD, mining, and water well drilling professionals. It simplifies job tasks, enhancing efficiency and safety by offering easy access to product details and calculations.

**Highlights:** DrillRite Chem product information, Reference materials, Calculators for drilling crews, HDD, mining, and water well drilling focus, Job efficiency and safety enhancement

**In-app purchases:** none


## Frequently asked questions

### Is Stealth Hydro Data free?

Stealth Hydro Data is free to download, with no in-app purchases.

### Is DR Chemical free?

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

### Do Stealth Hydro Data or DR Chemical have ads?

Neither Stealth Hydro Data nor DR Chemical shows ads.

### Which is updated more often, Stealth Hydro Data or DR Chemical?

Stealth Hydro Data ships an update every 41 months, and DR Chemical every 2 weeks. Most recently, Stealth Hydro Data was updated on October 18, 2026 and DR Chemical on October 21, 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.*