# RAKUZUMI > 3D design layout and measurement tool for construction and surveying. (iPhone/iPad app by TOPCON CORPORATION.) - Source: https://appshunter.io/ios/app/rakuzumi/id1536529567 (this page in markdown: same URL + `.md`) - Developer: [TOPCON CORPORATION](https://appshunter.io/developer/1518903564) - Category: Business - Price: Free - Rating: 3.73/5 from 11 App Store ratings - Age rating: 4+ - Requires: iOS 14.0 · 47 MB - Languages: English, Japanese - Released: 2020-12-15 - Data updated: 2026-08-16 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/rakuzumi/id1536529567/reviews.md ## What is RAKUZUMI? This application can communicate with a layout navigator LN Series. By using this, you can perform the layout work of 3-dimensional design data and as-build measurement of 3-dimensional point data. Key Features - 3D point data measurement using radiation observation - Guidance based on 3D design data - Layout positioning (Horizontal beam top and Leveling string point) - Distance measurement to boundaries Pricing Plan - Price: JPY 10,000 (tax included) - Duration: 1 year (billing starts after a 30-day free trial) Purchase Information ・Payment will be charged to your Apple Account at the time of purchase. ・Unless auto-renew is turned off at least 24 hours before the end of the current period, your subscription will automatically renew. Renewal charges will be applied within 24 hours after the current period ends. ・You can manage or cancel your subscription at: Launch the Settings app > Apple ID > Subscriptions > Select RAKUZUMI > Cancel your subscription ・If you change devices, you can restore your previous purchase for free. Launch the app > Tap the Hamburger button in the top bar > Store page > Restore Purchases Make sure you are logged into the App Store with the same Apple Account used for the original purchase. To use this application, the use of location information should be enabled. This application can be used on devices with iOS 16 or higher. For devices that cannot be installed, the message "Your devices is not compatible with this version" is displayed. Please note that operation on all devices is not guranteed. Tested Devices： +iPhone 14 Plus（iOS 16.1） +iPhone 14 Pro Max（iOS 17.0.2） +iPhone 16 Pro Max（iOS 18.4） The instruction manual can be downloaded from the TOPCON website. ## Key features - 3D point data measurement - Radiation observation for measurement - Guidance based on 3D design - Layout positioning - Distance measurement ## Frequently asked questions about RAKUZUMI ### What is RAKUZUMI used for? RAKUZUMI is used to communicate with a layout navigator LN Series for 3D design data layout and as-built measurement of 3D point data. It assists with layout positioning and distance measurement. ### How much does RAKUZUMI cost? RAKUZUMI has a pricing plan of JPY 10,000 (tax included) for a 1-year duration. A 30-day free trial is available before billing begins. ### Can I cancel my RAKUZUMI subscription? Yes, you can cancel your RAKUZUMI subscription by going to Settings > Apple ID > Subscriptions and selecting RAKUZUMI. Auto-renewal must be turned off at least 24 hours before the current period ends. ### How do I restore my RAKUZUMI purchase on a new device? To restore your RAKUZUMI purchase on a new device, launch the app, tap the Hamburger button, go to the Store page, and select 'Restore Purchases'. Ensure you are logged into the App Store with the same Apple Account. ### What are the device requirements for RAKUZUMI? RAKUZUMI requires iOS 16 or higher. Devices that cannot be installed will display a 'Your devices is not compatible with this version' message. Operation on all devices is not guaranteed. ### How often is RAKUZUMI updated? The latest version of RAKUZUMI is 1.8.0, last updated on February 13, 2026. This indicates regular updates are provided by the developer. ### What is the user sentiment for RAKUZUMI? RAKUZUMI has an average rating of 3.7 stars from 11 ratings. This suggests a generally positive but mixed user reception. ### Is RAKUZUMI compatible with older iOS versions? No, RAKUZUMI requires iOS 16 or higher. It is not compatible with older iOS versions, and devices running older systems will not be able to install the application. ## Version history (last 1 release) ### 1.8.0 — 2026-02-13 Ver.1.8.0 + Supported the functions of the new LN series model, "LN-1000i". - High-speed prism locking using real-time video with the camera function - Non-prism measurement in locations where prism installation is not possible - Self-inspection and calibration of the main unit using the angle adjustment function ## More apps by TOPCON CORPORATION - [TopLayout](https://appshunter.io/ios/app/toplayout/id1518903562) - [楽直](https://appshunter.io/ios/app/id1574481160) - [Topcon Laser Manager](https://appshunter.io/ios/app/topcon-laser-manager/id1589716964) - [楽座](https://appshunter.io/ios/app/id1590317875) All apps by TOPCON CORPORATION: https://appshunter.io/developer/1518903564 --- *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 2026-08-16.*