01 · Purpose
Real need
A useful application begins with work a person genuinely needs to complete.
The need defines the user, starting state, inputs, decisions, result, evidence, privacy boundary, and recovery path. A vague wish for features is not enough: the product must have a complete beginning, transformation, and useful outcome.
Explanatory archetype · not an applicationExplanatory example: turn a private collection of records into an organized, reviewable, exportable result without requiring an account.
Verification questionCan the entire workflow be described without naming a screen, theme, or technology?
02 · Meaning
Concept
A concept-native metaphor makes the workflow easier to understand and remember.
The visual world, terminology, pacing, and feedback should explain the work rather than decorate it. The concept earns its place only when it strengthens orientation, confidence, or agency and remains truthful when effects are reduced or removed.
Explanatory archetype · not an applicationExplanatory example: a calibrated workshop can make stages, stored state, reversible adjustments, and completed output legible without pretending to be a physical machine.
Verification questionDoes the concept clarify what changed, why it changed, and what the user can do next?
03 · Agency
Interaction
Direct, reversible controls carry the user through the complete workflow.
Touch, keyboard, and pointer paths express the same intention. State remains visible, destructive actions require clarity, errors explain recovery, and the core work never depends on a hidden gesture, precision drag, or external chatbot completing the task.
Explanatory archetype · not an applicationExplanatory example: choose an input, review a transformation, revise it, undo safely, and produce the result through equally complete touch and keyboard paths.
Verification questionCan the user act, understand the response, reverse a mistake, and continue without changing devices?
04 · Privacy
Local data
Storage, privacy, portability, and recovery are explicit parts of the instrument.
Local-first and private-by-default are design principles, not blanket promises. Each verified release must state what stays on the device, what uses a network, how long information persists, and whether export, backup, restore, history, or offline behavior is implemented. Nothing is described as local or offline unless the actual product proves it.
Explanatory archetype · not an applicationExplanatory example: records remain in local browser storage, can be exported to a documented file, restored from that file, and cleared through a visible control—only when those behaviors are implemented and verified.
Verification questionCan a person see where their information lives, move it, recover it, and remove it without relying on hidden infrastructure?
05 · Parity
Accessibility
The complete task survives changes in input, viewport, motion, effects, sound, and reading mode.
Phone portrait is primary, larger screens add efficiency, and keyboard operation remains equal. Labels, headings, status messages, error recovery, focus order, target size, contrast, and screen-reader structure are designed as product behavior rather than a late overlay.
Explanatory archetype · not an applicationExplanatory example: every adjustment has a labeled button or field, visible focus, a textual state, and a non-drag path; sound and animation add character but no required information.
Verification questionCan the same useful result be reached with touch, keyboard, screen reader, reduced settings, and audio off?
06 · Evidence
Verification
Public feature claims follow directly tested behavior, not intention or mockup copy.
Core workflow, error paths, save and recovery, import and export, backup and restore, responsive layouts, input parity, privacy statements, rights, packaging, and compatibility are verified wherever promised. Environment limits narrow the claim; they do not turn the owner into an internal tester or justify an unfinished release.
Explanatory archetype · not an applicationExplanatory example: a restore claim is tested from a clean state with a real exported file, invalid-file recovery, reload, and a confirmed usable result.
Verification questionCan every sentence on the public product page be traced to direct evidence or a clearly bounded external dependency?
07 · Completion
Ownership
A final-quality Demo and physically separate Full make the value and boundary honest.
The free Demo is a complete, representative workflow rather than disposable advertising. The Full is normally $17.99 once, physically separate, and contains the complete verified capability set without ads, subscriptions, loot boxes, or paid currency. Data and outputs remain portable wherever the application promises portability.
Explanatory archetype · not an applicationExplanatory example: the Demo completes one meaningful bounded workflow; the separate Full expands capacity and capability without hiding the Demo behind an account or timed unlock.
Verification questionCan the user understand what is free, what is paid, what they keep, and how the complete result is delivered before purchase?