Survey Toolbox vs Survey C
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Survey Toolbox
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Survey Toolbox คือเครื่องมือคำนวณสำหรับงานสำรวจและวิศวกรรมโยธา ออกแบบมาเพื่อให้ช่างสำรวจ นักศึกษา และวิศวกรภาคสนามสามารถคำนวณค่าพื้นฐานได้อย่างรวดเร็วและแม่นยำ แอปนี้รวบรวมสูตรสำคัญ เช่น • การคำนวณ Azimuth และระยะทาง (ΔN, ΔE, Distance, Azimuth) • การตรวจสอบค่าคลาดเคลื่อน (Deviation, CH, O/S) • รองรับทั้งหน่วยองศา DMS และหน่วยทศนิยม • บันทึกผลลัพธ์และแชร์ได้ทันทีผ่าน LINE หรืออีเมล เหมาะสำหรับช่างสำรวจภาคสนาม นักศึกษาวิศวกรรมโยธา และผู้ที่ต้องการความแม่นยำในงานวัดระยะทุกประเภท ต้องสมัครสมาชิก Pro เพื่อปลดล็อกเครื่องมือทั้งหมด Survey Toolbox is a professional field surveying calculator for civil engineers and surveyors. It provides fast and precise computations for essential surveying formulas such as: • Azimuth and Distance (ΔN, ΔE, Distance, Azimuth) • Deviation checks (Deviation, CH, O/S) • Supports both DMS and decimal degree input • Save and share results instantly via LINE or email Perfect for field surveyors, civil engineering students, and professionals who value accuracy and efficiency in their surveying tasks. Full access requires a Survey Toolbox Pro subscription. Unlock all professional tools, including curve calculations, result recording, and offline use, by subscribing to Pro. Terms of Use: https://sites.google.com/view/survey-toolbox?usp=sharing Privacy Policy:https://sites.google.com/view/survey-toolbox?usp=sharing
Survey C
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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.
Screenshots
Verdict
The clearest difference is update cadence: Survey C at weekly against Survey Toolbox's every 6 weeks. Survey Toolbox's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On price, 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. Survey Toolbox sells 3 in-app purchases, starting at $1.99 per 7 days and Survey C sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Survey Toolbox ships an update every 6 weeks, Survey C weekly. The most recent releases landed on October 19, 2026 and October 28, 2026 respectively.
| Parameter | Survey Toolbox | Survey C |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 47 MB | 5 MB |
| Age rating | 4+ | 12+ |
| Developer | Kongkrit Thongrueangsri | Ngoc Tung Nguyen |
In-app purchases
Survey Toolbox
- Weekly Plan$1.997 Days
- Monthly Plan3 Days trial$3.991 Month
- Yearly Plan7 Days trial$39.991 Year
Survey C
- Premium$200.00









