Lidark: Underground LiDAR Map
Find the way out, no GPS
Only for iPhone
Free · In‑App Purchases
iPhone
Wherever GPS can't reach, keep your thread.
Underground there is no signal and no GPS. Lidark uses your iPhone's LiDAR scanner to draw the plan of the gallery as you walk, and lead you back to the entrance. For caving, urban exploration, quarries, mines and tunnels, and for the basement or attic at home too.
THREE REASONS TO KEEP IT
1. The way back to the entrance, offline: Lidark computes the real distance to walk along your path and an arrow points to the next stretch. A 3D scanner shows you what you scanned; Lidark tells you how to get out.
2. A clean 2D plan, free to export: a sharp vector plan to share as an image or a printable PDF, with no subscription and no account.
3. A 3D survey textured with the photos taken during the scan (Lidark Pro).
HOW IT WORKS
1. Start a survey at the entrance: the LiDAR picks up walls and floor.
2. Walk normally: the minimap is drawn live (walls, floor colored by altitude, path, distance to the entrance). Drop markers: junction, shaft, danger or free.
3. To get out, follow the arrow: the shortest way along what you actually walked.
The survey is saved on your iPhone with its 2D plan and its 3D model, markers included.
WHEREVER GPS CAN'T REACH: MORE USES
The same principle works elsewhere:
- Basement, cellar, attic, crawl space, garage: the plan of dark places with no signal.
- Room before a renovation: a PDF plan and a 3D model to send to your contractor, viewable in the free web viewer.
- Technical room, gallery, tunnel: a quick survey, to complete with your instruments.
- Underground car park: an arrow back to your starting point when looking for your car or the exit.
- Crypt, vaulted cellar, authorised cavity: a dated 3D model for your archives.
- 3D creators: a scanned room, exported as GLB, OBJ or PLY for Blender.
The survey is indicative: Lidark is not a certified measuring instrument and replaces neither a land surveyor nor a quantity surveyor.
BUILT FOR DARKNESS
Pure black screen to save battery, giant figures, large touch targets made for gloves. A moon button turns everything red to protect your night vision. The torch turns on by itself in the dark. Moving too fast, not enough detail, tracking lost, low battery: vibration and a message, and nothing is recorded until tracking is reliable.
EXPORT AND RESUME
2D plan as an image or a printable PDF: free. PLY, OBJ and GLB export of the 3D model: Lidark Pro. Come back the next day: Lidark realigns to the same frame of reference and you extend your survey (Lidark Pro).
FREE WEB VIEWER
Open your PLY, OBJ and GLB files in your browser at lidark.app/en/viewer/, no account: the file stays on your device.
FREE, AND A ONE-TIME PURCHASE TO GO FURTHER
Free: scanning, the minimap, the way back to the entrance, markers, the 2D plan and its image/PDF export, 3 saved surveys. Scanning and the way back are always free.
Lidark Pro, a one-time purchase (6.99 € in France), no subscription: unlimited surveys, resuming a survey, the textured 3D model, PLY, OBJ and GLB export.
YOUR PRIVACY
No ads. No account. No data collected: your surveys stay on your iPhone. The camera is used for tracking and for the model's textures, on the device, and nothing is sent. Everything works offline.
COMPATIBILITY
iPhone with a LiDAR scanner (iPhone 12 Pro and later Pro models), iOS 18 or later. On another iPhone you can browse the example survey, but not scan. Interface in English and French.
SAFETY
Lidark is a navigation aid, not a safety device: tracking can degrade, the battery can run out, the phone can overheat. Never rely on it as your only way to find the exit. Do not go down alone, without backup lighting or a power bank, or without telling someone your route. Respect access bans and local rules.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.0.1: small improvements. You can now help us improve Lidark by sharing anonymous usage statistics (optional, can be turned off in Settings). Your surveys never leave the device.
The developer, alexandre kaczor, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- alexandre kaczor
- Size
- 5.1 MB
- Category
- Navigation
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later.
• iPhone 6S
• iPhone 6S Plus
• iPhone SE (1st generation)
• iPhone 7
• iPhone 7 Plus
• iPhone 8
• iPhone 8 Plus
• iPhone X
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e
• iPhone 18 Pro
• iPhone 18 Pro Max
• iPhone Duo
- iPhone
- Languages
- English and French
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lidark Pro $5.99
- Copyright
- © 2026 KConsulting