Timberlog: Log Scale Calc1.14.0 - App Store

Timberlog is the log scale and timber calculator for loggers, foresters, landowners and timber buyers. Scale each log in seconds, keep your own tally with species, grade and price, and send it as PDF or Excel - fully offline.

SCALE LOGS IN BOARD FEET
. Doyle, Scribner Decimal C and International 1/4" log rules - Doyle matches the printed chart
. Big keys, readable in bright sunlight, one-handed entry
. Diameter or circumference, feet and inches or metric
. Cut back for defects: enter the cut back length or diameter and see gross and net board feet (Pro)

SEE THE LOAD'S VALUE AS YOU SCALE
. Prices per species and grade in $ per MBF
. Own price for a single log (Pro)
. Total board feet, gross volume, dollar value and average $/MBF on one screen
. Species, grade and tag number on every log; scan a barcode or QR code for the tag

YOUR TALLY SHEET, READY TO SEND
. PDF and Excel with buyer, seller and every log
. Print, or share by email, Messages or Files
. Save and reload tallies, keep several lists open at once

COUNT A WHOLE PILE FROM ONE PHOTO
. PhotoMeasure: take a photo of the log ends and get the log count and estimated diameters in seconds
. Check and correct every detection before you add it to your tally
. 3 photo measurements a month in the free version

ONE APP FOR THE WHOLE JOB
. Logs, lumber (width x thickness x length), firewood cords and standing trees
. Also Huber, Smalian, Hoppus, JAS, ISO 4480-83, Ontario, Roy, Cedar 2/3 Rule and European tables
. Bark deduction and weight estimates
. Quick setup on first start chooses units, log rule and what you record for each log

Works offline. No account needed.

SELLING TIMBER IN THE EU?
Timberlog also keeps EUDR harvest records and prepares the simplified due diligence statement, with plot geolocation (GeoJSON) and a 5-year reference number vault. It helps you collect data; it is not legal advice, and you submit the statement yourself in the official EU system.

FREE + PRO
Measuring and calculating are free. Pro removes ads and unlocks cut back, price per log, unlimited photo measurements, editing and EUDR export.

Version History - Defects: deduct a percentage of the volume, or cut back the length or diameter (Pro) – reports and Excel show gross and net volume
- Price per log: give a single log its own price within the same quality (Pro)
- Prices per 1000 board feet (MBF)
- The totals line also shows gross volume when the list has deductions
- Quick setup on first start: units, log rule and what you record for each log
- Clearer Settings in groups, log rule picker with search, one choice for how prices are set
- Help and tutorials inside the app
- Automatic log numbers keep leading zeros (014716 → 014717) 1.14.0 1d ago - Photo measurement: automatic detection of log faces works again – recent versions drew a grid of circles across the whole photo instead of detecting the logs
- Sawn timber, imperial units: length entered in inches is now calculated correctly (the volume was 12 times too high) 1.13.2 Oct 5 - Sharing a list now also attaches it as a .timberlog file (zipped) next to the Excel file – the recipient opens it straight in Timberlog
- Doyle Log Rule: results match printed Doyle charts (e.g. 19" × 11' = 155 BF, previously 154)
- EUDR Poland: before "Parcel at my location" the app explains that your position is sent once to the public cadastre service GUGiK ULDK 1.13.1 Sep 30 - Fetch the parcel by its cadastral reference – IGN API Carto (commune, section, number) or GUGiK ULDK (TERYT): outline and hectares without typing coordinates; works offline with the reference alone
- Proof of legal harvest by country: coupe libre, PSG/CBPS/RTG, DDT authorisation; świadectwo legalności, UPUL
- France: selling standing? Your buyer is the operator – export the parcel for them
- Vault: delivery note/invoice number, supplier filter
- Photo measurement: in Adjust, drag the handles to change the ellipse’s shape and rotation 1.13.0 Sep 28 - New: automatic backup — the app keeps a copy of your permits, ledger, declarations and vault (plus lists and settings) in your own iCloud Drive folder; the last three copies are kept
- After switching or reinstalling your phone the app finds the copy and offers to restore it — your EUDR reference numbers stay with you for 5 years
- "Restore from backup folder" in EUDR settings with a choice of copy
- Declaration identifier instead of reference number (Article 4a) and minor fixes 1.12.2 Sep 24 - New: scan the QR code on a permit — number, dates, permitted volume, plots and location fill in by themselves (ZGS permits, Slovenia)
- Import plot geometry from GeoJSON, select the parcel, cadastral code and area
- The EUDR declaration is one-off — the app tells you when a new plot or a new commodity requires an update in the EU IS
- HS subheadings by species and diameter and a net mass estimate in the declaration
- Share a permit with another device; export the harvest ledger to CSV, PDF or GeoJSON; verification date and PDF attachment for received EUDR numbers 1.12.1 Sep 10 - New: Save/Load — save your log lists to files, load or delete them
- Full data backup and restore; backups from Android work here too
- Version history: restore an earlier saved version of a list
- .timberlog and .tlbackup files open directly in the app 1.11.2 Sep 6 - New: EUDR module — keep your felling permits in one place, harvested volumes are recorded automatically
- Prepare the annual EUDR declaration and copy it into the EU information system
- Keep received EUDR reference numbers stored for 5 years 1.11.1 Sep 1 - Fixed a camera crash on iPhone 17 at max resolution
- New setting: adjustable input units for sawn wood
- New setting: vibration feedback when adding/deleting a log 1.10.4 Aug 29 - Photo measurement: fixed ellipse rotation and centering, more accurate detection
- Fixed camera preview stretching and landscape orientation issues 1.10.3 Aug 22 - Measure log piles from a photo — diameters shown right on the image.
- Tag logs by scanning a barcode or QR code. 1.10.2 Aug 19 New: sawn lumber calculation, weight estimates, and multiple open lists. Pro removes all ads. 1.9.4 Jul 7 - Added Smalian (two-diameter) volume formula for more accurate log measurements
- Added the option to attach comments to items 1.9.3 Jun 19 - Added support for sawn wood (sawn timber) calculation
- Added option to work with multiple packet lists open at the same time for faster switching between jobs
- Various stability and performance improvements 1.9.2 Jun 7 New features added:
- Print reports — print a report directly from the app, or save it as a PDF.
- Timber weight calculation — estimate the weight of your timber.
- More report details — add company, customer, and other information to your reports.
Improvements & fixes 1.9.1 May 31 Added local Hungarian timber volume tables for tree species: Oak, Tannery, Beech, Acacia, Hornbeam and other hardwoods, Poplar, Other softwoods, Pine and also ISO 4480-83 timber volume calculation standard 1.8.7 Jan 20 Extended local Hungarian timber volume tables for tree species Nyár 1.8.6 12/15/2025 Minor bug-fixes 1.8.5 12/12/2025 Added Cedar Log Scale - 2/3 Rule for Board Feet estimation 1.8.4 12/11/2025 Extended International 1/4-inch Log Rule for logs longer than 16 ft 1.8.3 10/27/2025 minor bug fixes and improvements 1.8.2 10/06/2025 Added option to use prices 1.8.1 04/07/2025 Fixed calculation error with decimal thickness of timber bark 1.7.1 03/11/2025 Updated International 1/4" Log Rule calculation 1.6.6 03/03/2025 Fixed calculation with Scribner Decimal C Log Rule 1.6.5 11/12/2024