# LRTK — Easy High-Accuracy Surveying

> Easy High-Accuracy Surveying (iPhone/iPad app by レフィクシア株式会社.)

- Source: https://appshunter.io/ios/app/lrtk/id1641216786 (this page in markdown: same URL + `.md`)
- Developer: [レフィクシア株式会社](https://appshunter.io/developer/1599841370)
- Category: Productivity, Developer Tools
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 676 MB
- Languages: American English, Japanese
- Released: 2022-08-25
- Data updated: 2026-08-25
- User reviews in markdown: https://appshunter.io/ios/app/lrtk/id1641216786/reviews.md

## What is LRTK?

Easily Handle High-Accuracy Survey Data on Your Smartphone

This is the dedicated app for the "LRTK" centimeter-level GNSS device (*1).
By connecting to the LRTK receiver and configuring Network RTK (NtripClient), you can achieve centimeter-level positioning accuracy.

Through integration with the LRTK Cloud (*2), captured location data can be instantly synced and viewed via a web browser.

Key Features & Use Cases:
• Easy access to high-accuracy surveying.
• Instantly share field survey data with office PCs.
• Manage location data alongside site photos.
• Easily acquire point cloud data.

Note on Altitude Calculation:
To obtain JGD2011 (Japan Geodetic Datum 2011) altitude, this app utilizes the calculation API provided by the Geospatial Information Authority of Japan (*3).

(*1) https://www.lefixea.com/lrtk
(*2) https://lconstruction.lefixea.jp/
(*3) https://vldb.gsi.go.jp/sokuchi/surveycalc/api_help.html


## Version history (last 5 releases)

### 2.1.19 — 2026-08-22

The following content has been updated:​
・Other updates

### 2.1.18 — 2026-08-19

The following content has been updated:​
・Other updates

### 2.1.17 — 2026-08-07

The following content has been updated:​
・Other updates

### 2.1.16 — 2026-08-01

The following content has been updated:​
・Other updates

### 2.1.15 — 2026-07-24

The following content has been updated:​
・Other updates

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| --- | --- | --- | --- |
| [基準点ナビ](https://appshunter.io/ios/app/id6789161221) | — | Free | Productivity |
| [Scanat](https://appshunter.io/ios/app/scanat/id1589890507) | 5.0 (1) | Free | Productivity |
| [mapry建築](https://appshunter.io/ios/app/mapry/id6572285559) | — | Free | Productivity |
| [GENAR](https://appshunter.io/ios/app/genar/id1530135027) | — | Free | Productivity |

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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 2026-08-25.*