# Kubaj: Volume Calculator — Lumber & Log Measurement Tool

> Mobile tool for calculating timber and log volumes using multiple measurement methods. (iPhone/iPad app by Bahattin Duran.)

- Source: https://appshunter.io/ios/app/kubaj-volume-calculator/id6746670197 (this page in markdown: same URL + `.md`)
- Developer: [Bahattin Duran](https://appshunter.io/developer/1677311418)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.4 · 18 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2025-06-06
- Data updated: 2026-08-22
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/kubaj-volume-calculator/id6746670197/reviews.md

## What is Kubaj?

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.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Monthly | $6.99 | per month |
| Pro Annual | $29.99 | per year |
| Pro Weekly | $2.99 | per 7 days |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/kubaj-volume-calculator/id6746670197/reviews.md

### 5/5 — Best

*2025-08-20*

Best calculator

## Frequently asked questions about Kubaj

### What measurement methods does Kubaj offer?

Kubaj supports multiple industry-standard methods including Huber, Smalian, Newton, JAS, Doyle, and Scribner for precise volume calculations.

### Can Kubaj be used offline?

Yes, Kubaj is designed to work offline, making it ideal for use in the field without an internet connection.

### What are the subscription options for Kubaj?

Kubaj offers Pro Weekly at $2.99 with a 3-day free trial, Pro Monthly at $6.99 with a 3-day free trial, and Pro Annual at $29.99 with a 7-day free trial.

### How do I cancel my Kubaj subscription?

You can manage or cancel your subscription and free trial in your device's Settings > Apple ID after purchase. Auto-renewal can be turned off at least 24 hours before the current period ends.

### What is the age rating for Kubaj?

Kubaj has an age rating of 4+, making it suitable for a wide range of users.

### Does Kubaj have ads?

No, the app promises 'No ads' as part of its privacy promise and is ad-free for subscribers.

### On which devices can Kubaj be used?

Kubaj is built natively for iOS and is supported on iPhone and iPad devices.

### How often is Kubaj updated?

The latest version, 1.20, was last updated on April 30, 2026, indicating a commitment to regular updates and improvements.

## Version history (last 5 releases)

### 1.22 — 2026-08-13

Bug fixes and improvements.

### 1.21 — 2026-07-11

Bug fixes and improvements.

### 1.20 — 2026-04-30

Bug fixes and improvements.

### 1.17 — 2026-04-20

Bug fixes and improvements.

### 1.16 — 2025-12-20

Daha fazla hesaplama yöntemi eklendi ve hatalar giderildi.

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All apps by Bahattin Duran: https://appshunter.io/developer/1677311418

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*