Comparison

TreeMeasure Pro vs Opti Clinometer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

TreeMeasure Pro

Features
Read full description

Tree Measure Pro is a professional forestry measurement app powered by augmented reality and LiDAR technology. Measure tree diameters, heights and volumes, and conduct Bitterlich angle counts directly in the field using your iPhone camera. No additional equipment needed. FEATURES: • AR Inventory — tree diameter, height and volume with LiDAR precision • Sample Plots — fixed area plot measurements with automatic calculations • Tree Heights — AR-based height measurement • Tree Crown — crown height, base and width in AR • Circumference — for trunks too wide for calipers: place a marker and walk around the tree • Round Logs — volume of felled timber, Smalian or Huber formula • Bitterlich — basal area angle count method • Clinometer — terrain slope measurement • Records — save, view and manage all your measurements • Map — visualize all measured trees on an interactive map • Export — CSV, GeoJSON and PDF reports for office use • iCloud sync — records shared between your iPhone and iPad (optional) • Apple Watch — trigger a measurement from your wrist • Shortcuts & Action button — open any module with a single press • Metric and US units — cm/m or inches/feet, with US volume equations • Works on any iPhone — LiDAR improves precision but is not required • Works offline — no internet connection required in the field Free tier includes 10 measurements per module. Subscribe to TreeMeasure Pro for unlimited access to all features. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Opti Clinometer

Features
Read full description

Opti Clinometer turns your iPhone into a precise field clinometer — a modern alternative to classic optical instruments. TWO MEASUREMENT MODES • Sight mode: hold the phone horizontally at eye level and aim along its top edge, like a classic clinometer. The right-hand end points at your target. • Camera mode: aim with the on-screen crosshair and read the slope to whatever you are looking at. SIMPLE BY DESIGN Tap the screen once — the reading freezes and is saved. Tap again to resume. That is the whole workflow. BUILT FOR REAL FIELD WORK • Rotating artificial horizon and bubble levels help you hold steady • Color-coded slope scale: green below 8%, yellow 8–15%, red above 15% • Optional measurement photos with a viewfinder HUD • Coordinates saved with measurements and a satellite map • Measurement history with notes and CSV export • Readings shown in both percent and degrees NO NONSENSE No ads, no accounts, no tracking. The app collects no data at all.

Screenshots

TreeMeasure Pro4 screens
Opti Clinometer4 screens

Verdict

The call

The clearest difference is in-app purchases: Opti Clinometer at none against TreeMeasure Pro's 2. Opti Clinometer also leads on iOS requirement (17.0 vs 26.0). TreeMeasure Pro's advantage is device support (3 vs 1). On price, update cadence and ads there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. TreeMeasure Pro sells 2 in-app purchases, starting at $3.99 per month. Opti Clinometer asks for nothing beyond the download.

UpkeepUpdate frequency

TreeMeasure Pro ships an update every 3 days, Opti Clinometer every 2 days. Both last shipped on October 19, 2026.

Scorecard3 real differences Ā· 3 level
TreeMeasure Pro versus Opti Clinometer: the parameters behind the verdict, then further details
ParameterTreeMeasure ProOpti Clinometer
PriceFreeFree
Update frequencyEvery 3 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS26.017.0 — better
Further details — not scored
Size12 MB2 MB
Age rating4+4+
DeveloperFlorin NicolaBurak Kizilobek

In-app purchases

2 purchases

TreeMeasure Pro

Subscriptions2
  • TreeMeasure Pro Monthly$3.991 Month
  • TreeMeasure Pro Yearly$39.991 Year
None

Opti Clinometer

No in-app purchases

Questions

Is TreeMeasure Pro free?
TreeMeasure Pro is free to download, with in-app purchases available.
Is Opti Clinometer free?
Opti Clinometer is free to download, with no in-app purchases.
Do TreeMeasure Pro or Opti Clinometer have ads?
Neither TreeMeasure Pro nor Opti Clinometer shows ads.
Which is updated more often, TreeMeasure Pro or Opti Clinometer?
TreeMeasure Pro ships an update every 3 days, and Opti Clinometer every 2 days. Most recently, TreeMeasure Pro was updated on October 19, 2026 and Opti Clinometer on October 19, 2026.

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