A field tool for Danish detectorists
Built for metal detecting
in Denmark
LiDAR terrain, historical maps and protected zones — all the official Danish data in one app, at one price.
Available now on Google Play — Android. The core app is free.
Requires Android 7.0 or newer
Bare-earth LiDAR
The ground beneath the trees
The same patch of Danish ground in two datasets: an aerial photo, and the LiDAR shaded-relief that reveals what the tree canopy hides.
In the field
How a walk with Muld works
Four steps, from reading the ground to reporting a find.
Read the landscape
LiDAR terrain and historical maps reveal barrows, hollow ways and old farmsteads that modern aerial photos hide. Find ground worth walking.
Know where you can dig
Protected zones — fortidsminder (ancient monuments), beskyttede sten- og jorddiger (protected stone and earth dykes), kulturarvsarealer (cultural-heritage areas) and more — are shown on the map, so you know where you can't dig before you set out. Landowner permission is still yours to get — parcel boundaries show whose door to knock on.
Detect & record
GPS session tracking draws your route as you sweep, so you can see what ground you've covered — and what you haven't.
Log & submit
Record finds with photos, depth and notes, then submit to DIME straight from the field — or keep them on your phone. Danefæ (finds of cultural-historical significance) must be reported by law; everything else is your call.
App screenshots
Trusted sources
Built on Denmark's official data
No third-party feeds. Muld renders the official public datasets the Danish state publishes.
Muld also works with DIME — Denmark's national finds register, run by Aarhus University — so you can submit finds to your own DIME account without re-typing them.
Pricing
One price. Every layer.
The core app is free. Muld+ unlocks LiDAR terrain, historical map layers and offline downloads — all of it, in one subscription. No stacking add-ons, no per-layer paywalls.
| Feature | Free | Muld+ |
|---|---|---|
| Aerial base map | ✓ | ✓ |
| Protected zones (monuments, dikes, §3) | ✓ | ✓ |
| GPS tracking & find journal | ✓ | ✓ |
| DIME submission | ✓ | ✓ |
| LiDAR terrain | — | ✓ |
| Historical maps (1800s) | — | ✓ |
| Offline map downloads | — | ✓ |
| Journal export (GPX, CSV) | — | ✓ |
Free 7-day trial on yearly, billed through Google Play. See full pricing and what Muld+ includes →
The full kit
Everything in Muld
Everything you need in the field — free unless marked Muld+.
Maps & terrain
- Aerial base map
- LiDAR terrain Muld+
- Historical & aerial archives — 1800s & early-1900s maps, year-by-year aerial Muld+
- Offline map downloads Muld+
On the ground
- GPS session tracking — foreground or background
- Session replay — walk your route back
- Find journal — photos, depth, notes, GPS-tagged
Research & legal
- Protected zones — fortidsminder, diger, kulturarvsarealer, §3 nature, coastal & dune protection
- Registry find-spots & monuments on the map
- Parcel lookup (matrikel)
Reporting & your data
- Submit finds to your own DIME account
- GPX export of session tracks Muld+
- Journal export — illustrated report, CSV, Google Earth and GPX Muld+
- Finds & photos stored on-device
- No public map — your spots stay yours
From the maker
Why I built Muld
I came to metal detecting and hit a wall. The apps I tried were either generic GPS loggers or thin wrappers around a single map — none of them helped me read the Danish landscape, stay clear of protected ground, or report finds to DIME without a fight.
So I built the tool I wanted in the field: LiDAR and historical maps to find promising ground, protected zones drawn on the map so I know where I can't dig, and a quick way to submit a find to DIME when it matters — the app I wanted, so the app I made.
And to the friends who tested the earliest, roughest builds — hunting bugs and telling me the truth about what didn't work — thank you. Muld is better because of you.
— Ignas, founder
Frequently asked questions
Where can I use a metal detector in Denmark?
On private land with the landowner's explicit permission, and outside protected zones (fortidsminder, beskyttede sten- og jorddiger, kulturarvsarealer). Beaches and state forests have additional rules — always verify locally. The app shows protected zones on the map, but the legal responsibility is yours. Read our full guide to the rules for metal detecting in Denmark.
Is the app free?
The core app is free: aerial map, protected-zone overlays, GPS session tracking, DIME submission, and a find journal with photos and notes. Muld+ unlocks LiDAR terrain, the 1800s historical map layers, and offline map downloads.
What is DIME, and do I have to use it?
DIME is the official Danish national metal-detecting register, operated by Aarhus University and Moesgaard Museum. Danish law requires reporting finds of cultural-historical significance ("danefæ"). DIME is the standard way to do it. Submission via Muld is opt-in per find — you decide what (if anything) leaves your phone.
Is Muld affiliated with DIME or Aarhus University?
No. Muld is an independent app and is not affiliated with, endorsed by, or connected to DIME, Aarhus University or Moesgaard Museum. Muld simply helps you submit finds to your own DIME account faster — you sign in with your own DIME login.
What does Muld not do?
Muld doesn't sync your finds to a shared cloud or publish your spots — there's no public map of where people detect, by design, so productive sites stay safe from nighthawking. It won't identify finds for you, and it's no substitute for landowner permission or knowing the local rules. It's a private field tool, not a social network.
Does it work offline?
Yes. Your finds, photos and session tracks stay on the phone and need no connection. Offline map downloads are a Muld+ feature.
Is there an iOS version?
Not yet. Muld is Android-only at launch. If you'd like an iOS version, mail hello@muld.dev so we know there's demand.
Visiting from abroad?
Detecting in Denmark as a visitor
Denmark is welcoming to detectorists, but a few rules are strict and apply to everyone — resident or not.
- Landowner permission is mandatory on private land. Always get it first — Muld shows parcel boundaries so you know whose land you're standing on.
- Danefæ must be reported. Finds of cultural-historical significance belong to the state by law; DIME is the official register, and Muld pre-fills the submission straight from your journal.
- Protected zones are off-limits — ancient monuments, dikes and §3 nature. Muld draws them on the map so you see them before you dig.
The whole app, including the DIME flow, works in English — the data is Danish, the experience doesn't have to be. And your finds stay on your own device, not on a public map. New here? Start with our full guide to the rules for metal detecting in Denmark.
Get Muld on your phone
Free to download on Google Play — the core app is free, and Muld+ unlocks the rest.