# Survey C-Plus: AutoCAD Export — Professional survey and design

> Professional survey and design (iPhone/iPad app by Ngoc Tung Nguyen.)

- Source: https://appshunter.io/ios/app/survey-c/id6756013455 (this page in markdown: same URL + `.md`)
- Developer: [Ngoc Tung Nguyen](https://appshunter.io/developer/1123458177)
- Category: Utilities, Graphics & Design
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 17.6 · 5 MB
- Languages: American English
- Released: 2025-12-12
- Data updated: 2026-01-06
- User reviews in markdown: https://appshunter.io/ios/app/survey-c/id6756013455/reviews.md

## What is Survey C?

Professional applications for surveying engineers working on electrical, water, transportation, and telecommunications projects, with support for exporting DXF files for opening in AutoCAD (points, text, roads, and contour lines).

Survey One and Survey C-Plus form a comprehensive application suite for surveying, design, supervision, and field documentation, suitable for a wide range of engineering projects.

The suite provides complete surveying and design capabilities, including DXF (AutoCAD) export.

No computer, Google Earth, AutoCAD offsets, or Civil 3D are required — all workflows are handled directly on your iPhone.

Main Features

SURVEY ONE:
• Survey and mark point coordinates
• Record detailed information for each point
• Capture unlimited images per point, recorded directly at the marked location
• Support recording point content using icons
• Export NNT files (modern survey data format)
• Export KML files (compatible with Google Earth and Windows)
• Support deleting and editing points

SURVEY C-PLUS:
• Receive shared files from any source
• Convert KML files to NNT format while preserving data integrity
• Export DXF files for opening in AutoCAD
• High-speed file processing and publishing, significantly reducing project time (from days to minutes)
• Full layer support: points, text, blocks, roads, and road offsets
• Support survey lines up to 25 km with high accuracy

Who is it for?

• Transportation
• Power and energy
• Surveying and geodesy
• Construction and infrastructure
• Telecommunications

Particularly suitable for the design and supervision of construction projects.

Why choose Survey One and Survey C-Plus?

• Covers core requirements for engineering and construction projects
• Easy to use
• More cost-effective compared to similar solutions
• Fast, compact, and accurate
• Opens large files smoothly
• Does not collect user data

Survey One and Survey C-Plus are reliable tools for surveying, design, and supervision of construction projects.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium | $200.00 | one-time |



## Version history (last 4 releases)

### 1.12 — 2026-01-05

Fix payment issues caused by poor connection

### 1.11 — 2025-12-29

Fix bug (for KML files from other sources)

### 1.1 — 2025-12-23

Automatic color adjustment for iPhone dark mode.

Automatic language adaptation by country.

### 1.0 — 2025-12-12

No release notes.

## More apps by Ngoc Tung Nguyen

- [Silent Ball: Triple modes](https://appshunter.io/ios/app/silent-ball/id1148098948)
- [Maze: A New Definition](https://appshunter.io/ios/app/maze/id1151910577)
- [Survey One: Survey to AutoCAD](https://appshunter.io/ios/app/survey-one/id6755945244)

All apps by Ngoc Tung Nguyen: https://appshunter.io/developer/1123458177

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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 2026-01-06.*