Observe
Capture the shape of a problem through measurements, constraints, and context.
Earthsensing
Software for careful measurement, practical mapping, and technical tools that turn observations into useful everyday workflows.
Sensing, structured for use.
Earthsensing is a small software effort around signals from the world: environmental context, measured values, location-aware thinking, and precise tools for people who work with numbers.
Structure
Organize technical inputs into clear, repeatable interfaces and local workflows.
Apply
Build focused tools that help students, engineers, and technical users move faster.
iPhone Apps
Earthsensing apps are designed as focused utilities: local-first, direct, and built around clear technical workflows.
Scientific Calc 991CW
A scientific calculator for everyday calculation and advanced math workflows, including complex numbers, statistics, matrices, equations, tables, unit tools, vectors, ratios, and more.
Available Modes
Calculate and Complex modes are free. Optional Pro access unlocks advanced calculator modes through Apple-managed in-app purchases.
Privacy Statement
Scientific Calc 991CW does not collect user data. It has no ads, no tracking, no analytics SDKs, no accounts, and no backend data collection. Calculator input, settings, local history, and purchase entitlement state remain on the user's device.
In-app purchases and subscriptions are processed by Apple through StoreKit. Apple may process payment, purchase, and subscription information according to Apple's App Store privacy practices.
Read the full privacy policyContact
For app support, privacy questions, or App Store review contact, email Murad.A.Yaghi@icloud.com.