Arboreal Forest6.12 - App Store

Arboreal Forest - Forest Inventory App

The fastest and most accurate way to measure your forest - straight from your iPhone. Two professional plot methods in one app: fixed-area plots and prism plots. No caliper, no relascope, no paper forms.

Used by professional foresters, forest engineers, and land managers across Europe and the Americas. Validated in peer-reviewed research and awarded best mobile app for forest measurements.

Two ways to measure your forest

FIXED-AREA PLOTS
Walk the plot and measure every tree with AR and LiDAR. Diameter, height and species are recorded tree by tree, and plot results are compiled instantly.
- Diameter and basal area
- Trees per hectare
- Stand volume
- Tree height
- Tree species

PRISM PLOTS - NEW
Variable radius plots (angle-count sampling), the standard method for timber cruising in North America. The iPhone's telephoto camera works as a precise digital prism: stand at plot center, turn around the phone, and the app shows which trees are in.
- Choose your basal area factor (BAF)
- Big BAF sampling: count with one BAF, measure a subsample with a larger one - and get stand volume
- [Automatic slope correction]
- Basal area and volume on the spot - no tally sheet

2.5x faster than traditional methods
Arboreal Forest replaces caliper, tape, relascope and prism with AR, LiDAR and camera technology. You get compiled results immediately - no office work needed afterwards.

Sub-centimeter accuracy
Diameter measurements validated against manual measurements in a 2024 scientific study show sub-centimeter accuracy. In a 2023 comparison against competing apps, Arboreal Forest outperformed competitors on diameter and trees per hectare.

Built for real fieldwork

Works offline - no signal needed in the forest
All data synced to the cloud automatically
Export via REST API to your own systems
No reference sticks or additional tools required
Familiar workflow for anyone who has measured sample plots before

Trusted by leading forestry organisations
Sveaskog, Suzano, Forest Design, Treemetrics, Skogshubben, The Navigator Company, and Palos - among others - rely on Arboreal Forest for professional forest inventory.

"We measured the diameter of 10,236 trees and the systematic error was less than 1 mm."
- Guilherme Fonseca, Forest Engineer, Suzano

"The measurements in the forest are much smoother and go faster. I get summary and compiled data to interpret directly in the app."
- Sara Brandén, Area Manager, Sveaskog

Try all features for free

No commitment needed to get started. Subscribe weekly or monthly when you're ready. Your data remains accessible even if you cancel.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Version History Height trees are easier to spot: the red ring marking the trees to measure for height now grows with distance beyond 5 m and stays bright red in shade, so you can find it from across the plot.
New Video tutorials 6.12 4d ago • Denmark: volume now uses the official Danish forest statistics functions, with total volume and merchantable volume to a 7 cm top.
• France: volume follows the IGN national standard (stem to a 7 cm top), plus total volume including branches, for all French species.
• The volume info button now shows the volume type and source for each species in every country.
• Tracking is explained
• Prism plots show QMD outside the Nordics and correct per-acre units in the summary
• Fewer false sensor warnings when a measurement starts. 6.10 6d ago Bugfixes - measuring young trees 6.09 Oct 4 Some small fixes of the summaries in US (Imperial units) 6.08 Oct 3 Prism Plot — point sampling on your iPhone/iPad
Improved selection of tree species
New volume formulas and ways to calculate the volume 6.06 Sep 30 Bugfixes 5.22 Jul 8 Diameter measurements with camera improved on leaning trees
Improved Emlid support
Bugfixes 5.21 Jul 3 Emlid GNSS reconnects if connection is lost
If you try to create an account that already exists but is not verified a new attempt is made to verify the account 5.09 May 14 Bugfixes 5.06 May 13 Edit name and comment on already uploaded plots
New summary view
Upload is not automatic anymore - you need to trigger it from the start page
Added special features for UPM 5.05 May 7 Improved sync of single plots in bad cellular connection 5.00 Apr 28 Improved visualization: device inclination; borderline is concealed when behind the tree
Bug fixes 4.98 Apr 24 Click on the MiniMap on the top and see all measured trees on a large map, click on individual trees and edit or remove them (Only works for circular plots at the moment)
Now supports UPM:s workflow 4.97 Mar 27 Select confidence needed for Lidar measurement of diameter. 4.95 Mar 15 Bugfixes - registration of new accout 4.90 Mar 6 Improved AI-model for measuring diameter from Image.
Upgraded to Swift 6 - improved stability
Bugfixes 4.75 Mar 3 Bugfixes - now downloads external plots comments. 4.63 Feb 25 Bugfix - Lidar did get bad readings of distances
Assign different layers. 4.61 Feb 24 Support for Emlid Reach RX2 4.48 Jan 20 Now also in German, fixed problems with tutorial videos 4.46 12/08/2025 Minor bugfixes 4.41 11/13/2025 Minor improvements 4.31 11/01/2025 - The GPS-position of the trees are calculated on the actual position of the tree and not by the position of the phone or external gnss receiver
- Emlid Reach RX support
- Bugfixes 4.30 10/30/2025 Measure Dominant Height for stands with more than one species (requires Volume formula for that species in the app)
Show the tree that has dominant height
Show the distance to the suggested tree to measure height on
The red lines are now shown in 2D instead of in the 3D Space, it saves compute
Smaller red lines, makes it easier to understand where the diameter is mesured
The green marker is now more reliable
Warning if overheating the phone 4.29 10/20/2025 Bugfixes 4.28 09/24/2025