# Directional Survey Methods — Calculations and Formulas

> Calculations and Formulas (iPhone/iPad app by Carlos Moura.)

- Source: https://appshunter.io/ios/app/directional-survey-methods/id1130800392 (this page in markdown: same URL + `.md`)
- Developer: [Carlos Moura](https://appshunter.io/developer/407501202)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 7 MB
- Languages: American English
- Released: 2016-07-05
- Data updated: 2026-09-02
- User reviews in markdown: https://appshunter.io/ios/app/directional-survey-methods/id1130800392/reviews.md

## What is Directional Survey Methods?

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


## Version history (last 3 releases)

### 3.0 — 2024-09-09

- added full support for Dark Mode
- added support for iPad 11 screen format
- added some improvements
- new icon

### 2.0 — 2019-10-19

- Compatibility with newer iPhone and iPad models.
- Compatibility with newer iOS and iPadOS.
- Compatibilidade with Dark Mode.

### 1.0 — 2016-07-05

This update is signed with Apple’s latest signing certificate. No new features are included.

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## More apps by Carlos Moura

- [Drilling Hydraulics (Basic)](https://appshunter.io/ios/app/drilling-hydraulics-basic/id673992115)
- [Directional Drilling](https://appshunter.io/ios/app/directional-drilling/id928989079)
- [Ton Miles Calculator](https://appshunter.io/ios/app/ton-miles-calculator/id965020659)
- [3D Interpolation](https://appshunter.io/ios/app/3d-interpolation/id1000298349)
- [Kick Game 2](https://appshunter.io/ios/app/kick-game-2/id1060736340)
- [Driller's Method](https://appshunter.io/ios/app/drillers-method/id1067011800)

All apps by Carlos Moura: https://appshunter.io/developer/407501202

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*