FieldSketch vs Sokuten

Survey and draft — all by yourself. The site inspection app built for architects. ■ No more two-person tape measure walks FieldSketch uses your iPhone's motion sensors to measure distances as you walk. Aim the crosshair, tap to drop a pin. One site in 10 minutes, calibration included. No need to book an assistant. ■ CAD drawings straight from the field Export as DXF (R12) — opens directly in Jw_cad and other CAD software. Register a cadastral PDF in advance and the app automatically merges it with your field data. ■ Everything captured in one place Photos are taken automatically at each measurement point. Record video while you measure to document the site. Points, distances, and photos compiled into a PDF report — ready for same-day delivery. ■ 4 simple steps Calibration → Site boundary → Surroundings (gutters, roads) → Landmarks (manholes, etc.). Guided workflow. Easy to undo and redo. ■ Accuracy Approx. 3 cm error over 30 m (verified on device). No LiDAR required — works on any iPhone. A 3-point calibration at the start improves accuracy further. ※ Designed for site reconnaissance and planning. Not intended for legal boundary surveys. ■ Pricing Measurement, photos, video, and PDF export are free forever. CAD (DXF) and CSV export require a Premium plan (monthly / lifetime). Try all features free for 14 days. Terms of Use (EULA) By downloading or using this app, you agree to Apple’s standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Read SIMA files, compute coordinates on site, and write them back — entirely on your iPhone. A coordinate calculator built for field surveying in Japan. ■ SIMA (survey data exchange format) support Import SIMA files received via AirDrop or the Files app. Unreadable lines never stop the import: a report tells you which lines were skipped and why, and unrecognized records are preserved verbatim and written back in place on export. ■ Seven field calculations Inverse (distance, bearing, height difference), radiation, open/closed traverse with closure error and compass-rule adjustment, intersection, area (coordinate method), offset stakes, and perpendicular foot. Register any result as a new point with one tap. ■ Input built for the field A large keypad, one-tap switching between DD.MMSS and decimal degrees, intuitive negative coordinates, and high-contrast display for outdoor readability. ■ Designed so data survives Atomic saves with three generations of automatic backups. If a save ever fails you are told immediately and can retry. No network access; your data is never sent to our servers. ■ No subscription All calculations and SIMA import (up to 50 points) are free to try. Sokuten Pro (one-time purchase — see the App Store listing for current pricing) unlocks unlimited points, SIMA/CSV export, and unlimited history. Note: Verify results before relying on them. For public survey or registration deliverables, follow the Survey Act and your client's specifications.