Drillstring Toolbox vs Directional Survey Methods
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drillstring Toolbox
This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.
- Drill-stem load capacity calculation
- API connection selection
- Makeup torque calculation
- Tensile capacity calculation
- Drill pipe tube capacities
Read full descriptionHide full description
Drillstring Toolbox is a free calculator from Standard DS-1 that gives you the drill-stem load capacities you need! You can choose an API connection (along with the size you're interested in) to find its recommended makeup torque and tensile capacity. Tap the "Tube" tab to find the tensile and torsion capacities for drill pipe tubes as well!
Directional Survey Methods
Read full descriptionHide full description
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
Screenshots
Verdict
The clearest difference is iOS requirement: Directional Survey Methods at 12.0 against Drillstring Toolbox's 14.0. On price, update cadence, ads and in-app purchases 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.
Drillstring Toolbox ships an update every 39 months, Directional Survey Methods every 50 months. The most recent releases landed on September 5, 2026 and September 15, 2026 respectively.
| Parameter | Drillstring Toolbox | Directional Survey Methods |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 39 months — better | Every 50 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Bureau Veritas North America, Inc. | Carlos Moura |
In-app purchases
Drillstring Toolbox
No in-app purchases
Directional Survey Methods
No in-app purchases
Questions
Is Drillstring Toolbox free?
Is Directional Survey Methods free?
Do Drillstring Toolbox or Directional Survey Methods have ads?
Which is updated more often, Drillstring Toolbox or Directional Survey Methods?
Other comparisons
