# Directional Survey Methods vs DR Chemical

The clearest difference is update cadence: DR Chemical at every 2 weeks against Directional Survey Methods's every 50 months. Directional Survey Methods'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.

Directional Survey Methods ships an update every 50 months, DR Chemical every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Directional Survey Methods | 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 50 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 7 MB | 36 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [GROUP M7, INC.](https://appshunter.io/developer/1607536150) |

## What reviewers say

### Directional Survey Methods

[App page](https://appshunter.io/ios/app/directional-survey-methods/id1130800392)

**Features:** macOS Compatibility, Vision Pro support

**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 Directional Survey Methods free?

Directional Survey Methods 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 Directional Survey Methods or DR Chemical have ads?

Neither Directional Survey Methods nor DR Chemical shows ads.

### Which is updated more often, Directional Survey Methods or DR Chemical?

Directional Survey Methods ships an update every 50 months, and DR Chemical every 2 weeks. Most recently, Directional Survey Methods was updated on November 2, 2026 and DR Chemical on November 3, 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.*