Directional Survey Methods vs DR Chemical
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Directional Survey Methods
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This application uses the formulas to calculate the survey parameters (diff of TVD, N/S, E/W, DLS) between two stations of the methods: 1. Tangential 2. Balanced Tangential 3. Minimum Curvature 4. Radius of Curvature 5. Angle Averaging Also available the formulas of the methods. This app was developed based in existing spreadsheets. There is no comparison with any other software. You can contribute with suggestions for improvements, reporting bugs and spreading it to your friends. Our portfolio for Directional Drilling available on the App Store: - "Directional Drilling" a complete app (building and plotting) with well planning, survey, multi-lateral, etc. - There are also stand-alone applications for Well Planning, Well Survey and Multi-Lateral Wells. - "3D Interpolation" to calculate a survey data between two stations. DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at your own risk. Thanks
DR Chemical
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.
- DrillRite Chem product information
- Reference materials
- Calculators for drilling crews
- HDD, mining, and water well drilling focus
- Job efficiency and safety enhancement
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A reference guide app that shows DrillRite Chem products, reference materials, and calculators that HDD, mining, and water well drilling crews need to do their jobs easier, faster, and safer.
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Verdict
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.
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.
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.
| Parameter | Directional Survey Methods | DR Chemical |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 50 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 7 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlos Moura | GROUP M7, INC. |
In-app purchases
Directional Survey Methods
No in-app purchases
DR Chemical
No in-app purchases
Questions
Is Directional Survey Methods free?
Is DR Chemical free?
Do Directional Survey Methods or DR Chemical have ads?
Which is updated more often, Directional Survey Methods or DR Chemical?
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