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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteApex Calc is a browser utility described by its creator as a way to calculate mortgage payments and amortization, convert hourly wages to salary, and model compound interest with contributions. The project’s author also says it runs calculations on the user’s device and avoids tracking, but those privacy and speed claims have not been independently verified.
What Apex Calc is designed to calculate
Kamal Singh introduced Apex Calc in a DEV Community post published September 27, 2026, as a browser-based financial calculator suite—not a physical calculator. The post describes three tools:
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- Mortgage payments and amortization: estimate payments and project how a mortgage balance changes over time.
- Hourly-to-salary conversion: convert hourly wages into weekly, monthly, and annual breakdowns, with overtime adjustments.
- Compound interest: model investment growth with periodic contributions.
The post does not detail the calculators’ inputs, formulas, assumptions, or output formats. For a consequential decision, check the assumptions and results against the terms of the loan, pay arrangement, or investment scenario you are evaluating.
What the author says about privacy and performance
Singh says Apex Calc is built with vanilla JavaScript, HTML5, and CSS, and that calculations happen client-side without server roundtrips. The post also claims the utility uses no tracking pixels or external data collection and describes execution as taking less than a second on mobile and desktop. These are the author’s claims; the cited post does not provide an independent privacy audit, source-code review, or performance test. They should not be treated as verified guarantees.
#1 Best Overall
- Profitability calculations; cash flow function Calculates NPV and IRR for uneven cash flows
- Time-value-of-money and Amortization keys solve problems including: pension calculations, loans, mortgages, etc.
- Ideal calculator for students, managers and statisticians
- Built-in functionality : List-based one- and two-variable statistics with four regression options: linear, logarithmic, exponential and power
- The BA II Plus calculator is approved for use on the following professional exams: Chartered Financial Analyst exam. GARP Financial Risk Manager (FRM) exam. Certified Management Accountants exam
The author presents the project as an alternative to calculator pages burdened by display ads, autoplay video, and third-party analytics. That is the author’s motivation, not a measured comparison of other sites.
Where to access it—and what remains uncertain
The DEV post links to a Netlify-hosted Apex Calc deployment. The link records where the author directed readers; it does not establish that the deployment is currently available or that it still matches the version described in the post.
Rank #2
- PROFESSIONAL FINANCIAL CALCULATOR : Built-in TVM, IRR, NPV. Engineered for business analysts, real estate investors, accountants, and finance students.
- ADVANCED CASH FLOW & AMORTIZATION : Execute time value of money, break-even analysis, depreciation schedules, and bond pricing. Trusted for professional exam prep", MBA coursework, and banking certifications.
- CATIGA CF-300 : Flip-open hard case with a snap-close design for a secure fit. Compact and portable: designed for daily professional use in office, classroom, or on-site.
- ALL-IN-ONE FOR PROFESSIONALS : From NPV/IRR for real estate analysis to statistical calculations for business analysts. Handles probability, linear regression, and complex financial formulas.
- MORTGAGE, LOAN & INVESTMENT CALCULATOR : Covers bond pricing, loan amortization, investment analysis, and exam-level computations. Your go-to accounting calculator, business calculator, and real estate calculator in one device.
The post does not establish pricing, a paid tier, or a need to buy hardware or other physical products. It also does not document the calculation methods in enough detail to assess whether the tools fit a particular lender, employer, tax situation, or investment plan.
Crashes, No Sound, or Screen Glitches?
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallHow to assess a result before relying on it
- For a mortgage estimate, compare the displayed assumptions with your loan terms, including the rate, term, and any costs or charges the calculator may not include.
- For wage conversions, verify the hours, pay period, and overtime assumptions against your actual work arrangement. A conversion is not necessarily a take-home pay or tax calculation.
- For compound-interest projections, check the contribution schedule and assumed rate of return. A projection is a scenario, not a promise of investment performance.
- For sensitive financial inputs, do not infer data handling solely from the author’s privacy claims; the cited post does not independently verify them.
Source
Kamal Singh’s DEV Community post about building Apex Calc, published September 27, 2026.
Quick Recap
Best Value
- Brand New in box; The product ships with all relevant accessories
- Dedicated keys allow easy access to common financial and statistics functions
- Easy-to-use design provides business, finance and statistical calculations fast
- Specially designed to meet the mathematical needs
Rank #4
- Solves time-value-of-money calculations such as annuities, mortgages, leases, savings, and more
- Performs cash-flow analysis for up to 32 uneven cash flows with up to 4-digit frequencies
- Calculates various financial functions: Net Future Value Net present Value Modified Internal Rate of Return Internal Rate of Return Modified Duration Payback Discounted Payback
- The Texas Instruments BAII Plus Professional features an Automatic Power Down (APD) function for extended battery life
- Prompted display guides you through financial calculations showing current variable and label. Ten-digit display
Rank #3
- HP 10BII+ FOR STUDENTS & PROFESSIONALS – This HP calculator is built for business, finance, accounting, and statistics courses. Perfect for learners and professionals who need to solve common financial problems quickly without memorizing formulas or relying on spreadsheets.
- 100+ FUNCTIONS FOR REAL WORLD MATH – Quickly solve time value of money, interest rates, loan payments, NPV, IRR, cash flows, and more. The 10bII+ also includes probability distributions for statistics courses—a feature not often found in financial calculators.
- ALGORITHMIC INPUT WITH DEDICATED KEYS – This high-school/college calculator uses algebraic and chain logic with minimal keystrokes. Layout appears the same as standard calculators for easy learning. Dedicated keys give quick access to commonly used financial and statistical functions
- APPROVED FOR MAJOR EXAMS – The HP 10bII+ algebra calculator is permitted for use on SAT, PSAT/NMSQT, and AP tests. An ideal statistics calculator and business calculator for school finance and accounting students preparing for class, coursework, or standardized exams.
- INCLUDES TRAVEL CASE, CLEANING CLOTH & BATTERIES– Slim, durable, and easy to keep on hand or store in a backpack or locker. Includes a protective case, cleaning cloth, and batteries so it’s ready out of the box. Large screen with clear contrast (non-backlit) is easy to read during exams or lectures.
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