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Write and annotate handwritten notes on Android with page layouts, linked notes, and PDF tools.

Create and deliver documents from templates and connected data

A handwritten notebook for Apple Pencil notes, PDF markup, study tools, and creative pages.

Read study PDFs and make notes as part of one annotation workflow.

Measure which advertising calls become prospects and booked appointments.

View, compare and measure DICOM image studies

A handwriting notebook that links notes and searches handwriting, Markdown, and PDF text.

An open-source academic notebook that brings Markdown notes, PDF annotations, and literature management together.

A handwriting notebook with note-linked audio, handwriting recognition, and PDF annotation.

Process image stacks and quantify segmented structures

Note taking tool with flashcards, PDF annotation, and AI study features

An iPhone and iPad notebook for handwriting, PDF markup, audio notes, and searchable study material.

Practical finance, cooking and unit calculations

Date, number and measurement calculations

Solar position, photovoltaic and map calculations

Fluid-flow calculators for pipes, valves and measurements

Desktop unit conversion with custom conversion definitions

Metric and imperial conversion with reference charts

Validate and convert coded measurement-unit expressions

An Android handwriting workspace with notebooks, PDF markup, sticky notes, and corkboards.

Create a story and get it as a digital PDF or a printed hardcover.

Measure ICMP, TCP, latency and bandwidth from Windows

Collect large-scale DNS measurements with structured output

Measurement conversion across everyday and engineering units