Directional Survey Methods vs Drillstring Toolbox Premium
Price, ratings, monetisation and update history for both apps, side by side โ 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
Drillstring Toolbox Premium
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The DS-1 team has created this Drillstring Toolbox Premium! It's an advance calculator that does everything the free Drillstring toolbox does and more! With it you can find: - API-recommended makeup torques for drill-stem connections with whatever sizes you want to plug in. - The "T4" (maximum tensile capacity) torque for those connections, too. - Adjusted makeup torques when you want to optimize away from the standard numbers. - Tensile and torsion capacities for standard, thick-walled, and custom drill pipe tubes. - A combined load curve for whatever combination you come up with, which you can email to your colleagues. - Recommended makeup torques for many popular proprietary connections.
Screenshots
Verdict
The clearest difference is price: Directional Survey Methods at Free against Drillstring Toolbox Premium's $24.99. Directional Survey Methods also leads on iOS requirement (12.0 vs 14.0). Drillstring Toolbox Premium's advantage is update cadence (every 24 months vs every 50 months). On ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Directional Survey Methods is free to download; Drillstring Toolbox Premium costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Directional Survey Methods ships an update every 50 months, Drillstring Toolbox Premium every 24 months. The most recent releases landed on September 15, 2026 and September 20, 2026 respectively.
| Parameter | Directional Survey Methods | Drillstring Toolbox Premium |
|---|---|---|
| Price | Free โ better | $24.99 |
| Update frequency | Every 50 months | Every 24 months โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 14.0 |
| Further details โ not scored | ||
| Size | 7 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlos Moura | Bureau Veritas North America, Inc. |
In-app purchases
Directional Survey Methods
No in-app purchases
Drillstring Toolbox Premium
No in-app purchases
Questions
Is Directional Survey Methods free?
Is Drillstring Toolbox Premium free?
Do Directional Survey Methods or Drillstring Toolbox Premium have ads?
Which is updated more often, Directional Survey Methods or Drillstring Toolbox Premium?
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