Tree risk assessment app for arborists Tree risk reports, finished before you leave the site.
Limbscale is an offline app for arborists who assess trees with the basic tree risk assessment method (ANSI A300 Part 9, as taught in ISA TRAQ). Record targets, site factors and conditions, work through the likelihood and consequence matrices, add photos and GPS, and send the client a signed PDF.
Free for your first site. Pro: 7 days free, then $19.99 a month or $149.99 a year, or $99.99 once.
Tree 07, red oak
Codominant stems with included bark, over the sidewalk
| Likelihood of failure and impact | Negligible | Minor | Significant | Severe |
|---|---|---|---|---|
| Very likely | Low | Moderate | High | Extreme |
| Likely | Low | Moderate | High (this assessment) | High |
| Somewhat likely | Low | Low | Moderate | Moderate |
| Unlikely | Low | Low | Low | Low |
| DBH | 34 in |
|---|---|
| Target | Sidewalk and parked cars, frequent use |
| Likelihood of failure | Probable |
| Likelihood of impact | High |
| Consequences | Significant |
| Risk rating | High |
| Mitigation | Reduce the east stem, install a cable |
| Residual risk | Moderate |
| GPS | 45.52310, -122.67650 |
- Works fully offline
- iPhone and Android
- Pro free for 7 days
- Your data stays on your device
- Your company on every report
The risk report today
- The assessment gets filled in on a clipboard, then typed up again at the office.
- Photos are in the camera roll, GPS points are in another app, and the client is waiting.
- Business software for tree companies is built around estimates and crews, not the risk assessment, and it is billed per user every month.
What Limbscale does
Targets and site factors
Record each target, its occupancy and whether it can be moved or restricted, plus site history, topography, site changes, soil and wind exposure.
Likelihood and consequence matrices
Rate the likelihood of failure and of impact, combine them, then apply consequences. The rating follows from the matrix, so every tree part is rated the same way.
Mitigation and residual risk
List mitigation options for each condition with the residual risk, then set the overall rating and the recommended inspection interval.
Photos and GPS on every tree
Photos and coordinates are saved with the tree, even with no signal in the canopy or at the back of the lot.
A branded PDF for clients and municipalities
One tree or the whole site, with your logo, credentials and the assessor's signature, ready to email from the truck.
Inside Limbscale
Every tree on the site, rated at a glance 
The risk matrices, worked for you 
Tap the conditions you see 
A signed PDF for the client
How it works
Add the site and trees
Client, address, tree ID, species, DBH and location for each tree.
Assess each tree
Targets, site factors, conditions, the matrices and mitigation, all offline.
Send the report
Export a signed PDF with photos and a map link for each tree.
Price
Try it
Free
For your first site. Every screen works; reports are marked Trial.
Limbscale Pro
$19.99 a month
Or $149.99 a year. Both start with 7 days free; cancel any time in the App Store or Google Play. Prefer to pay once? $99.99 for life. Unlimited sites and clean, branded reports.
No per-report fees from us. Business platforms for tree companies are commonly billed per user, per month, for much more. Limbscale Pro is one low price for your phone, or one lifetime purchase.
Get Limbscale
Free to download and free for your first site. Then try Limbscale Pro free for 7 days.
Free tools and guides
Tree risk matrix calculator
Pick the likelihood of failure, of impact and the consequences; get the risk rating from the two ANSI A300 Part 9 matrices.
Questions
Does it work offline?
Yes. Everything in Limbscale, including photos and PDF reports, works with no signal. It never needs a connection to do its job.
Is it for iPhone or Android?
Both. Limbscale runs on iPhone and iPad, and on Android phones and tablets.
Is there a subscription?
You choose. Limbscale Pro is $19.99 a month or $149.99 a year through the App Store or Google Play, and both start with 7 days free: cancel before the trial ends and you pay nothing. Prefer to pay once? The lifetime unlock is $99.99. No per-report fees from us.
Where is my data stored?
On your device. There is no account and no cloud server holding your jobs. Your data, photos and reports stay on your phone or tablet until you choose to share them, so keep your device backed up.
Can I try it before paying?
Yes. Limbscale is free to download and free for your first site, with every screen working. Reports are marked Trial until you unlock Limbscale Pro: 7 days free, then $19.99 a month or $149.99 a year, or $99.99 once.
Can I get a refund?
You buy through the App Store or Google Play, so refunds follow Apple's and Google's policies. Try it free on one site first: every screen works, and reports are marked Trial until you unlock.
Is this an official ISA form or app?
No. Limbscale follows the structure of the basic assessment method so your field data is complete, but it is an independent app, not an ISA product. The PDF is laid out by Limbscale with your branding.
Do I need the TRAQ credential to use it?
The app does not check credentials. It is designed for arborists trained in the method, and the assessment and its conclusions are yours.