Comparison

Conversion vs Kubaj

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

Head to head
About

Conversion

This utility app provides instant conversions between a wide range of units, including metric, imperial, and currency. It features live exchange rates and supports 33 languages, all within a clean, clutter-free interface.

Highlights
  • Extensive unit categories (12 categories, 96 units)
  • Live, offline-capable currency exchange rates
  • Supports 33 languages and regional number formats
  • Modern, clutter-free interface with fluid animations
  • Full VoiceOver and accessibility support
  • No ads, analytics, or tracking
Features
Read full description

Type a number. Read the answer. That is the entire app. Conversion has been on the App Store since 2012. Version 4 is a complete rebuild — modern, quick, and still refreshingly free of clutter. BOTH UNITS, ALWAYS IN VIEW The two units face each other in the middle of the screen, right where you left them last time. Flick either one to change it, or tap an amount to turn the conversion around. Nothing to drill into. TWELVE CATEGORIES, 96 UNITS Length · Area · Volume · Weight · Temperature · Speed · Pressure · Power · Energy · Time · Computing — and Currency, with more than 160 world currencies. LIVE EXCHANGE RATES Rates refresh on their own and are stored on your device, so conversions still work on a plane or underground. When a rate is out of date the app says so, rather than quietly handing you an old number. YOUR LANGUAGE, YOUR NUMBERS 33 languages. Unit names, decimal separators and numbering systems all follow your region — so a comma lands where a comma belongs, and Arabic and Devanagari numerals are drawn properly. BUILT FOR iOS 26 Liquid Glass, a color for every category, fluid animation, haptics, and Dark Mode throughout. ACCESSIBLE FROM THE START Every control is labeled for VoiceOver. Text scales to the largest accessibility sizes. Reduce Motion is respected. A hardware keyboard drives the whole app. NOTHING COLLECTED No account, no ads, no analytics, no tracking. The app makes one kind of network request — for published exchange rates — and it carries nothing about you. Pay once. No subscription.

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.

Screenshots

Conversion4 screens
Kubaj4 screens

Verdict

The call

The clearest difference is price: Kubaj at Free against Conversion's $0.99. Kubaj also leads on rating (5.0 vs 3.0) and review sentiment (100% vs 61%). Conversion's advantage is in-app purchases (none vs 3) and ratings volume (5 vs 1). On update cadence, ads and device support 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

Kubaj is free to download; Conversion costs $0.99 up front. Kubaj sells 3 in-app purchases, starting at $2.99 per 7 days. Conversion asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Kubaj holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Conversion has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 61% of Conversion's written reviews are positive against 100% of Kubaj's.

UpkeepUpdate frequency

Conversion ships an update every 2 months, Kubaj monthly. Both last shipped on October 21, 2026.

Scorecard7 real differences · 3 level
Conversion versus Kubaj: the parameters behind the verdict, then further details
ParameterConversionKubaj
Price$0.99Free — better
Rating3.0 (5 ratings)5.0 (1 ratings) — better
Positive reviews61.0% of reviews100.0% of reviews — better
Number of ratings5 — better1
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.018.4 — better
Further details — not scored
Size2 MB18 MB
Age rating4+4+
DeveloperDuncan CampbellBahattin Duran

Customer experience

Conversion

Written reviews41 reviews
Positive61.0%
Neutral19.5%
Negative19.5%

Kubaj

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Conversion

No 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

Questions

Is Conversion free?
Conversion costs $0.99, with no in-app purchases.
Is Kubaj free?
Kubaj is free to download, with in-app purchases available.
Which has better reviews, Conversion or Kubaj?
Kubaj is rated higher. Conversion averages 3.0 out of 5 from 5 ratings, while Kubaj averages 5.0 from 1 ratings.
Do Conversion or Kubaj have ads?
Neither Conversion nor Kubaj shows ads.
Which is updated more often, Conversion or Kubaj?
Conversion ships an update every 2 months, and Kubaj monthly. Most recently, Conversion was updated on October 21, 2026 and Kubaj on October 21, 2026.

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