Halcyon Calc vs WispPGP

For students, engineers, scientists or people who fondly remember classic calculators, Halcyon Calc is a great application for manipulating numbers and even symbolic expressions. Features: - Use this calculator on an iPhone, iPod Touch or an iPad - Use your finger to quickly scroll through the stack to review intermediate results - Copy and paste support - Over 225 built-in operations, including trig, logarithms, real functions, complex operations and more - Allows you to work with real, complex and integer numbers. - Real and complex numbers can be displayed in standard, fixed, scientific and engineering format - Use over 120 built-in units to perform unit conversion or create your own units if the one you want is not already there - Integer numbers can be displayed in decimal, hexadecimal, octal and binary bases - Work with real and complex matrices and vectors. - Enter symbolic expressions and solve them for different values. Even better, solve quadratic formulas, collect and expand factors and terms, find minima, maxima and roots of any expression. - Plot symbolic expressions in X/Y coordinates. Pan the coordinate space by dragging the plot in any direction. Zoom in and out using a pinch gesture. - Determine symbolic derivative, taylor series or numeric integral of an expression. - Store numbers, lists, strings and expressions in symbols. Create hierarchies of symbols to allow you to organize your calculations. - Create sequences of calculator commands into programs, creating your own operations which you can then include in expressions. - Store statistical data and calculate totals, averages, standard deviations, linear regressions, etc over that data. - Calculate the probabilities associated with standard distributions like the normal, F and T distributions.

WispPGP is a focused OpenPGP toolkit for iPhone. Encrypt, decrypt, sign, and verify text in seconds, or use the Share Extension to protect content from any app and send it as ASCII‑armored .asc. Manage multiple keys, set an active key, and keep your workflow fast and predictable. Built for iOS 17+, WispPGP keeps cryptography practical: generate key pairs, label keys clearly, and choose whether to share encrypted output as a file attachment or as plain text. The experience is intentionally clean so you can work quickly without losing control of important details. Powered by GoOpenPGP (MIT) for broad OpenPGP compatibility. Armored exports include clear headers: Version: WispPGP, Comment: https://micro.mjanssen.nl/wisppgp Highlights • Encrypt and decrypt messages with OpenPGP. • Sign and verify messages to confirm authenticity. • Generate and manage multiple key pairs with name, email, and comment. • Set an active key to speed up repeated actions. • Share encrypted output as ASCII‑armored text or .asc files. • Use the Share Extension to protect text from any app. Security & Privacy • Biometric access is required for private keys and stored passphrases. • Private keys are stored in iOS Keychain with device-only access. • No plaintext key files are written to disk. • Sensitive passphrases are cleared when the app goes to background. • Optional clipboard auto-clear after pasting. • The source code is open source, so anyone can review what happens with their private keys. Security Test Checklist • Key Manager access prompts Face ID; cancel keeps the screen locked. • Private key actions (Decrypt/Sign/Export) always prompt biometrics. • Lockout behavior: repeated failures show the biometry lock message. • No biometric enrolled: shows a clear not enrolled/not available message. • Passcode disabled: shows a clear passcode-required message. • App backgrounding locks Key Manager again on return. • Share Extension prompts biometrics for private-key operations.