Comparison

Kubaj vs AR Protractor

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

Head to head
About

Kubaj

Calculate timber and log volumes accurately using various industry-standard methods. This tool supports offline use, unit conversion, batch calculations, and PDF report exports for forestry professionals.

Highlights
  • Volume calculation (Huber, Smalian, Newton, JAS, Doyle, Scribner)
  • Timber, lumber, firewood measurement
  • Diameter, length, trim input
  • Unit conversion (cm, m, in, ft)
  • Batch calculation
  • PDF report export
  • Offline functionality
Features
Read full description

From standing log to cubic meter, calculated where the trees are. If you have ever stood in a yard with a tape measure, a calculator and a damp notebook trying to price a stack of timber, Kubaj is the tool you wish you had brought. It is a quiet, on-device volume calculator for forestry — built for timber merchants, forest engineers, sawmill owners and log buyers who need precise numbers in the field, in the truck, or at the mill. The philosophy is simple: a log volume calculator should give you the right cubic meter at the right moment, without demanding a signal, an account or a desk. Every lot, every measurement and every customer record stays on this device — no cloud upload, no third-party server reading your business, no spreadsheet round-tripping through email. Every feature described below is unlocked only with an auto-renewable subscription purchased inside the app. New users receive a 3 day free trial; you may cancel anytime during the trial to avoid being charged. Enter diameter, length and trim, choose the method that matches your local standard, and the result is ready before you put the phone back in your pocket. Huber, Smalian, Newton, JAS, Doyle and Scribner are all supported, with unit conversion between centimetres, metres, inches and feet. Batch calculation handles a full lot at once, so a truckload of logs becomes a single total rather than thirty entries you have to chain together. Each lot can be logged with date, location, species and customer for traceability later, and a PDF report exports cleanly for the buyer, the office or the tax file. A clear summary view shows total volume, average log size and lot value in one glance. Beyond the core calculator, Kubaj handles the messy realities of working in a forest. Pricing per cubic meter turns rough field numbers into real invoices, a customer directory remembers who pays what and when, and advanced reports break the year down by species, by buyer and by yard. You can edit a measurement when a tape slipped, duplicate a previous lot for a repeat job, and recalculate everything in a different method if a buyer prefers Smalian over Huber. Mixed lots with different species and grades stay readable, with totals at the bottom and exceptions called out without clutter. Everything works offline, because forest roads do not have signal and battery icons flash red at the worst times. The interface ships in 39 languages with full accessibility and Dynamic Type, designed for people whose office is a logging trail and whose hands are often gloved. There is no account, no login screen and no analytics watching your work — your timber volume records belong to you. Whether you use it as a forestry calculator, a log measurement tool or a quiet sawmill companion, it stays out of the way until you need a number. Unlock with Pro: • Unlimited lots (free: 5) • All measurement methods including Doyle and Scribner • PDF and CSV report export • Customer directory and pricing per cubic meter • Advanced reports and ad-free interface Subscription Pricing & Terms Features require a subscription. Pricing and terms available in-app. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Manage or cancel your subscription and free-trial conversion in Settings > Apple ID after purchase. Any unused portion of the free-trial period will be forfeited when you purchase a subscription.

About

AR Protractor

Features
Read full description

AR Protractor is a portable measurement tool built on augmented reality that turns your phone into a portable rangefinder, protractor and volume meter. No extra hardware is needed — just open the camera and aim at a flat surface to get accurate measurement results instantly. ## Main Features • Rangefinder: Continuous single-point measurement with real-time display of segment length and total cumulative distance • Protractor: Calculate arbitrary planar angles via three-point measurement • Area Measurement: Two modes available — polygon and circle • Volume Measurement: One-tap calculation for cuboids, cylinders and irregular solids (frustum method) • Unit Conversion: Meters, centimeters, millimeters, feet, inches; cubic meters, liters, cubic feet, gallons • Marker Size Adjustment: Customize the size of measurement markers to suit your usage habits ## Premium Features Two unlocking options: yearly subscription (3-day free trial, cancel anytime, auto-renews yearly) or one-time purchase for permanent unlock. Unlock Angle Measurement, Area Measurement, and all volume features (Box / Cylinder), ad-free. ## Privacy & Support We value your privacy. All AR measurement processing happens locally on your device, and none of your environmental data will be uploaded. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Kubaj4 screens
AR Protractor4 screens

Verdict

The call

The clearest difference is iOS requirement: AR Protractor at 16 against Kubaj's 18.4. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kubaj sells 3 in-app purchases, starting at $2.99 per 7 days and AR Protractor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Kubaj ships an update monthly, AR Protractor every 3 weeks. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

Scorecard1 real difference · 9 level
Kubaj versus AR Protractor: the parameters behind the verdict, then further details
ParameterKubajAR Protractor
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.416 — better
Further details — not scored
Size18 MB2 MB
Age rating4+4+
DeveloperBahattin Duran晓强 江

In-app purchases

3 purchases

Kubaj

Subscriptions3
  • Pro Weekly3 Days trial$2.997 Days
  • Pro Monthly3 Days trial$6.991 Month
  • Pro Annual7 Days trial$29.991 Year
1 purchases

AR Protractor

One-time1
  • Unlock all features$4.99

Questions

Is Kubaj free?
Kubaj is free to download, with in-app purchases available.
Is AR Protractor free?
AR Protractor is free to download, with in-app purchases available.
Do Kubaj or AR Protractor have ads?
Neither Kubaj nor AR Protractor shows ads.
Which is updated more often, Kubaj or AR Protractor?
Kubaj ships an update monthly, and AR Protractor every 3 weeks. Most recently, Kubaj was updated on October 21, 2026 and AR Protractor on October 19, 2026.

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