Smart Calculator platform
Clear, reliable calculation tools for phones and computers.
Descriptive statistics, frequency tables, covariance, correlation, and linear regression.
Events, combinatorics, binomial, Poisson, and normal distributions.
Auxiliary calculators · 附屬計算器
SciCal600 remains the primary calculator. These two standalone computer-architecture learning tools are maintained as companion calculators.
Explore the lecture examples with 100 mailboxes, RTL stepping, self-modifying code and CPU performance analysis.
Open LMC · 開啟 LMCFollow the system bus, registers, memory and control signals one transfer at a time.
Open SystemBussing · 開啟系統匯流排模擬器Native app availability
The calculator core is shared across Web, Android, Windows, macOS and iOS. Testing downloads are published on GitHub only after their cloud checks pass.
Verified, development-signed testing APK. Android may ask you to allow installation from this source. A production release requires the protected production signing key.
Installed version
Testing installer and portable EXE. They are not commercially code-signed yet, so Microsoft SmartScreen may show a warning.
Intel and Apple-silicon testing archives. They are not Developer ID signed or notarized yet, so Gatekeeper may require manual approval.
Simulator build plus an unsigned device archive for later signing. Installing an IPA on a physical device requires Apple signing and provisioning. The Web app can still be added to the Home Screen from Safari.
Smart Calculator · Linear Algebra
Choose an operation, paste or type your matrices, and read a structured result. Real matrices up to 6 × 6 are supported.
Matrix workspace
One row per line · spaces or commas between values
Result
A + BInput and result dimensions will appear here.
Eigenvectors are available for all real 2 × 2 matrices and for real symmetric matrices up to 6 × 6. Complex 2 × 2 eigenpairs are displayed symbolically.
Smart Calculator · Statistics
Paste values for a complete descriptive summary. Add a matching Y series for covariance, correlation, and least-squares regression.
Smart Calculator · Probability
Calculate event relationships, arrangements, and common discrete and continuous probability models with input checks.
Results are numerical educational calculations. Check the assumptions of your real experiment or statistical model.
Smart Calculator · Computer Calculator
Explore exact number representations, follow ALU and LMC steps, and calculate practical architecture quantities.
Convert exact values and inspect every fixed-width interpretation.
Decode sign, exponent and fraction, including special values and neighbours.
A 100-mailbox sandbox with visible fetch-decode-execute state.
Every result shows its units and assumptions.
Smart Calculator · Economics Calculator
Convert currencies, inspect official Hong Kong rates, and model interest, loans and cash flows without hidden formulas.
HKD is the default base. Rates are references, not executable trading quotes.
Source: Frankfurter v2 / European Central Bank reference rates. frankfurter.dev · Reference only; not a bank or trading quote.
Latest complete dated records from official HKMA public APIs.
Source: Hong Kong Monetary Authority (HKMA) public API. HKMA API
The best lending rate series is HSBC's quoted rate; it does not represent every bank.
Choose simple or compound interest and state the compounding/day-count basis.
Hong Kong products do not all use one universal algorithm; check the contract's simple/compound and ordinary/leap-year basis.
Educational scenarios only—not a bank approval or quotation.
Educational fee-aware IRR estimate, not a formal APR calculated under every HKAB rule.
Secondary tools for budgets, savings goals and real returns.
Ten-language guide
Learn the keys, modes, and common calculation workflows.