CalculateLogic Pro
CalculateLogic Pro gives you every calculator on calculate.logicapplabs.com without ads, plus a native desktop app for offline use. Run margin, mortgage, TDEE, auto loan, and engineering calculations with zero accounts, zero uploads, and zero data retention.
Key Features
- Ad-Free Web Access on calculate.logicapplabs.com
- 100% Offline Desktop App — No Internet Required
- All 33 Calculators Included
- Finance, Math, Unit Conversion & Date/Time Tools
- Engineering, Real Estate & Automotive Calculators
- Health, E-Commerce, Education & Freelance Tools
- Native Multi-Threading with Rust & Tauri
- Cross-Platform: Windows, macOS, Linux
- Lifetime License with Free Updates
- Complete Privacy — Zero Telemetry
per license · Lifetime updates included
Try free at calculate.logicapplabs.com
Who buys a calculator suite
Two groups, for opposite reasons. The first works with numbers they would rather not put in someone else's browser session — salary and payroll figures, loan scenarios for a client, margin on a bid that has not gone out yet. Nothing leaves the machine in either version, but the offline build removes the question entirely.
The second group is tired of the ads. If you run a timecard calculation forty times a week, an ad-supported page is friction you are paying for in attention. The license removes it across calculate.logicapplabs.com on every browser you sign the key into.
What is in the thirty-three
The suite spans seven groups: loans and interest (mortgage, land and construction loan, auto loan, debt avalanche, compound interest), pricing and pay (margin, salary to hourly, ROAS, sales tax, freelance rate), everyday math (percentage, ratio, expression evaluator, final grade, tip, party planning), unit conversion (length, weight, temperature, pressure), dates and time (timecard, date difference, age, timezone offsets), engineering and vehicles (Ohm's law, area and volume, towing capacity, speedometer error, engine displacement), and health math (BMI, TDEE, one-rep max, macros).
They are separate tools rather than one mega-calculator because the inputs genuinely differ. A mortgage needs amortisation; a timecard needs rounding rules and break deductions. Merging them would mean a form where most fields are irrelevant.
Questions people ask before buying
Is the free web version limited?
No. Every calculator is fully functional for free with ads. The license buys the ad-free experience and the offline desktop build, not access to hidden features.
Does the desktop app need internet?
Only once, to activate the key. After that it runs entirely offline, which is the point for anyone working on an air-gapped or restricted network.
Are the financial results advice?
No. These are arithmetic tools. Amortisation and interest math are exact, but they do not know your tax situation, your lender's fee schedule, or your local regulations. Treat the output as a starting figure for a conversation with a professional.
Questions this page did not answer? Use the contact form — it reaches the person who wrote the software. Licensing terms are in the End-User License Agreement.