PhyllBeta
UX review // apps built with AI

Phyll

UX review for apps built with AI, inside the agent you already use.

Phyll runs in your Codex or Claude Code, on your own plan. It opens your app the way a first-time user would, shows what gets in the way and fixes it without touching your design.

Runs in
Codex / Claude Code
AI tokens
Your plan
Catalog
57 tells
License
MIT
Create accountCode on GitHub
Built in Lovable, Bolt or v0? Check a page, free, no account
Review // ReplyloopLaptop // 1440
Replyloop before the review: 9 fields for the first job
Before // 9 fields
Replyloop after the review: 2 fields for the first job
After // 2 fields
The first job

Send a DM to everyone who comments a keyword

Clicks9 → 3
Style kept10 of 10 traits
Review // Navalha BarbeariaLaptop // 1440
Navalha Barbearia before the review: 20 fields for the first job
Before // 20 fields
Navalha Barbearia after the review: 4 fields for the first job
After // 4 fields
The first job

Book a haircut

Clicks18 → 4
Style kept9 of 9 traits
Review // Orça JáLaptop // 1440
Orça Já before the review: 41 fields for the first job
Before // 41 fields
Orça Já after the review: 4 fields for the first job
After // 4 fields
The first job

Write a quote and send it to the client

Clicks10 → 2
Style kept9 of 10 traits
Review // Brasa BurgerLaptop // 1440
Brasa Burger before the review: 33 fields for the first job
Before // 33 fields
Brasa Burger after the review: 4 fields for the first job
After // 4 fields
The first job

Order a burger for delivery

Clicks15 → 5
Style kept8 of 8 traits
Example01020304 / 04
02  How it works3 steps

Three steps to a first review

  1. 01

    Create your account

    Use the form below, or run this in the terminal.

    npx phyll signup you@example.com
  2. 02

    Connect Phyll to your agent

    Setup registers Phyll in Codex, Claude Code, Cursor, Windsurf or Gemini CLI and installs the Chromium build its browser uses.

    npx phyll setup codex    # or claude, cursor, windsurf, gemini
  3. 03

    Ask for a review

    For example: review my app at http://localhost:3000. The report lands in .phyll/reports, with a link.

03  What it catches57 tells // 6 dimensions

Phyll keeps your design. The changes go where people get stuck.

Colors, fonts and layout stay as they are. Gradients, glass, emoji and centered heroes are listed as style notes and left alone.

  1. 01

    Purpose

    A first screen that does not say what the product does, a sales page in front of the tool, a dashboard of invented numbers for someone who just signed up.

  2. 02

    Flow

    A login before the menu, a CPF to book a haircut, 39 fields for a quote, a modal for everything, buttons that do nothing, a “Success!” that leads nowhere.

  3. 03

    Actions

    The main button far from the content it acts on, icon buttons with no name, delete without undo, actions that only appear on hover, choices the keyboard cannot reach.

  4. 04

    Look

    Gray text below the contrast minimum, white text on bright orange buttons, layouts that break on a phone.

  5. 05

    Copy

    “Supercharge your workflow”, “Get Started”, “Trusted by 10,000+”, John Doe or João da Silva, COMMENT_KEYWORD on screen, “Something went wrong”.

  6. 06

    States

    Empty states that only say “No data”, errors that only reach the console, a confirmation that shows someone else’s appointment, invisible keyboard focus.

04  ExamplesFour apps, before and after

Before and after

Fields and clicks count what a first-time user had to do for the first job. None of the before apps got that person to the result.

01 // DM automation

Replyloop

Send a DM to everyone who comments a keyword

Fields9 → 2
Clicks9 → 3
AI tell index75 → 7
Read the review
02 // Booking

Navalha Barbearia

Book a haircut

Fields20 → 4
Clicks18 → 4
AI tell index54 → 6
Read the review
03 // Quotes

Orça Já

Write a quote and send it to the client

Fields41 → 4
Clicks10 → 2
AI tell index66 → 6
Read the review
04 // Delivery

Brasa Burger

Order a burger for delivery

Fields33 → 4
Clicks15 → 5
AI tell index53 → 6
Read the review
See every screen, before and after
05  PricingCheckout shows the price in your currency

Your plan pays for the AI

The AI is your agent's, on your plan. Phyll never charges for tokens. A full review is a long task for your agent: on two example apps in Claude Code it took 11 to 16 minutes and 80 to 100 steps. The scanner uses no AI at all.

Free

US$ 0

  • The source scanner, as often as you like
  • 5 full reviews, with fixes
  • A link to each report
Create a free account
Phyll Pro

≈ US$ 1.79 a month

Approximate price in USD at today's rate. Phyll Pro is R$ 9 in Brazilian reais, and checkout lets you pay in your currency and shows the exact amount.

  • Unlimited reviews
  • History and before and after for every project
  • Specialized rule packs as they come out

If you are not signed in, Phyll asks for your account first. In the terminal: npx phyll pro.

06 // Free

Create your free account

Code and catalog on GitHub // MIT license