Skip to content
Tree-Keeper
App Store

Features

How the key works

Tree-Keeper asks about four things you can see while standing in front of a tree. Each answer narrows the bundled almanac, and the best match comes back with its score.

  • Leaf

    The first thing most people look at.

  • Bark

    Still there to read in winter.

  • Fruit

    What hangs from it, or lies under it.

  • Form

    The shape of the whole tree.

Under the tree, in order

From the first question to a tree you tend.

Four screens from the app, each the step it shows.

  • Tree-Keeper's Identify screen: work the key with up to seven questions and no signal, and a list of finds: an inconclusive find, a Douglas-fir and a Bigleaf Maple, each with its confidence score.
    1

    Work the key

    Answer what you can see and skip what you cannot. Up to seven questions narrow the bundled almanac to a ranked match with its score.

  • Tree-Keeper's Tree almanac: its species list with search and Pet-safe, Toxic and Native filters, each species with its Latin name and a pet state such as Use caution, Pet safe or Toxic.
    2

    Check the species

    Search by common or Latin name, then filter to pet safe, toxic or native. Each entry carries its pet state.

  • Tree-Keeper's Your grove screen: tree and species counts, the native share, a pet caution, a relative map of the grove, and The Lookout, a Douglas-fir marked pet safe.
    3

    Save it to your grove

    The tree keeps its place note and the answers that found it. Your grove counts its trees and species as it grows.

  • Tree-Keeper's Tend your trees screen: a seasonal planner for zone 7 listing inspect, prune and fertilize windows for each tree, and a Tree doctor symptom checklist.
    4

    Tend it

    Log watering, pruning and inspections with the date kept. With Ranger Pass, a planner tuned to your hardiness zone gives each tree its window.

1 / 4

Pet safety

Is it safe for the dog?

A species page in the app says safe, use caution or toxic for dogs and cats. Here are seven, as the app marks them.

Black Walnut Juglans nigra

Toxic

Black Walnut: toxic to dogs and cats.

This is information, and your vet decides. If your pet ate some, call your vet or an animal poison hotline.

The app and Ranger Pass

What comes with the app, and what Ranger Pass adds.

Ranger Pass is optional: $9.99 a month or $59.99 a year, and it starts with a 7-day free trial.

FeatureThe appRanger Pass
The guided key and its confidence score
The almanac, offline
Whether a tree is safe for dogs and cats
Your forest and its care log
Confidence and biodiversity analytics
A seasonal care planner for your hardiness zone
Advanced tree triage
Regional survival packs
Download on the App Store

Payment is charged to your Apple ID at confirmation. Ranger Pass renews unless canceled at least 24 hours before the period ends, and you manage it in Settings.

Tree-Keeper's More screen: Ranger Pass active with analytics, the seasonal planner and advanced triage on, and a ranger profile with home region and hardiness zone.

On the phone

What runs on the phone, and what leaves it.

Field conditions are the normal case, so the work happens where you are standing.

Runs on the phone

No server call

  • The identification key and every confidence score.
  • The almanac, bundled from first launch.
  • Your forest and its care log.

Leaves the phone, only when you ask

Three cases

  • A backup of your forest, if you make an account. Deleting the account removes it.
  • A regional survival pack, downloaded once, then offline.
  • Your Ranger Pass subscription, handled by Apple.

Asked at the point of use

Say no and it still works

  • Camera and photos, when you add a photo to a saved tree.
  • Location, when you add a place note to a find.
  • Notifications, when you turn on care reminders.

Why a key, not a camera

Up to seven questions, then the best match with its score.

Download it on the App Store. Ranger Pass is there when you want the planner and the analytics.

Download on the App Store
Read why it works this way

Tree-Keeper is published on the App Store by Alden Morris Enterprises LLC.