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AI-powered usability testing for product development

Product

Plan the study. Observe real use. Make informed design decisions.

TestFlow helps you investigate how people use physical and digital products. Prepare a study with AI assistance, guide moderated sessions and keep every observation connected to the results.

Your team reviews what AI drafts and interprets the evidence. The experience comes from real participants using the product.

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Prepare

A study plan your whole team can follow

Start from a short description, a template or an imported file. Everything AI drafts stays editable.

A task selected in the task list, with its scenario, moderator script and what to observe.

Studies drafted with AI

Describe the product and the question; AI drafts the objectives, procedure, tasks and questionnaire for you to edit.

A written study plan

Product under test, business case, objectives, participants, equipment, responsibilities, location, dates and procedure — ready to print.

A consistent structure, with room for observation

Each task has the scenario to read aloud, the moderator’s script and what to observe, so every session runs the same way.

Questionnaires and SUS

Text, single-choice, multiple-choice and dropdown questions. Add the System Usability Scale in one click.

Run

Capture observations as people use your product

Moderators go through the tasks in order and note what happens as it happens: the outcome, the time and what the participant said and did. TestFlow keeps a written record of each session; it doesn’t record audio or video.

A live session on task 3 of 6, with the outcome and the participant’s answer recorded.

Participants and custom fields

Add participants one by one or import a CSV, with the fields that matter to your study.

Times, outcomes and notes

A timer per task, one click for the outcome, and notes on what the participant said and did.

Remote questionnaires

Participants who can’t attend answer through a single-use link protected by a password.

Moderators and roles

Invite moderators to a project and choose who administers it.

Analyse

Evidence to guide your next design decision

Results update after every session. Problem tasks are flagged, and each finding keeps its evidence and decision.

Task performance for six tasks, with completion rate and median time.

Task performance

Success rate, time on task and errors for each task, with problem tasks flagged automatically.

Questionnaires and SUS

Every answer in one view, and the SUS score with its grade and interpretation.

Review suggested findings against the evidence

AI can suggest findings from the recorded results and notes. Check each one against the evidence, set its severity, record the decision and follow it until it’s been tested again.

Reports to share

A PDF report with the accepted findings, and the study plan and session sheets to print.

What your team records, and what TestFlow works out

Your team records

  • The outcome of each task: success, partial or failure
  • Notes on what the participant said and did
  • The errors observed in each task
  • Findings, their severity and the decision taken

TestFlow works out

  • Time on task, from the session timer
  • Success rates and median times for each task
  • The SUS score, with its grade
  • Which tasks are likely problems, flagged automatically

Participants provide

Their experience of the product, and their answers to the questionnaire and SUS: in the session, or through a remote link if they can’t attend.

What each export contains

Your data stays yours. Each format has a different job.

Format What it contains Use it to
CSV Task and questionnaire responses with times, errors and moderator notes; participant demographics; SUS scores. Analyse the results in a spreadsheet or statistics tool.
JSON The project structure: study plan, tests, task groups, tasks, questionnaires, participants and their custom fields. Responses are not included — use CSV for those. Reuse a study’s setup in another project.
PDF The report with results and accepted findings; the study plan and session sheets. Share the outcome with clients, teachers or stakeholders.

Build Better Products with Usability Testing

Your first study can be ready to run today.

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What happens after you sign up

  1. Confirm your email address and sign in.
  2. Start a project: blank, from a template, from an imported file, or drafted by AI from a short description.
  3. Add participants, invite your moderators and run the first session.