Tsoden
Public audit for marginstudy.app

What we found

I built a Mac app to make technical PDF textbooks easier to study is 3 fixes away from more enrolments.

3 things a visitor needs are missing. The ones costing you the most: Search engines can’t tell what you sell, no easy way to get in touch and Search engines have no map of your site.

Read from 3 live pages · metadata, crawlability, trust, CTA, schema, sitemap, robots

Questions about this audit? Reply to the email or write to us — a human answers same day.

3 fixable leaks

The prioritized plan to fix all 3 leaks above and win more enrolments is below — free, nothing to unlock.

Walk me through the 3 fixes - free See what's leaking ↓

What buyers and AI/search engines see right now

Pages checked43 read in full
How we read itRead as crawlers doSame view buyers & bots get
Response time493msUnder the 2.5s target
Checks verified9/134 need fixing

Diagnostics

What we checked, and what we found

40 checks across six areas — search visibility, AI & answer engines, performance, security, conversion and trust — each measured against I built a Mac app to make technical PDF textbooks easier to study's live site.

25 pass 2 warn 13 fail

Of the 40 checks we ran on your page

Anything we couldn’t read is its own segment — a page that blocks our reader is our limitation, not a mark against you, and it never lowers your score.

Fine as-is — 25Needs fixing — 13Couldn’t read — 2
See the numbers
StateCountShare
On your page2563%
Missing1333%
Couldn’t read25%

Where your page is strong, and where it isn’t

Each area is scored 0–100 against what a customer needs to find before they act.

strong (75+)close (50–74)needs work (under 50)
Can they take the next step 57
Reasons to believe you 54
Can people find you 65
Can AI assistants read it 22
Speed on a phone 78
A safe, trusted connection 85
See the numbers
Part of your pageScoreHow that reads
Can they take the next step57/100close
Reasons to believe you54/100close
Can people find you65/100close
Can AI assistants read it22/100needs work
Speed on a phone78/100strong
A safe, trusted connection85/100strong

Priorities

Fix these first

Ranked by revenue impact. Each one is something students — or an AI answer engine — need to see and currently can't. Fixing the top few moves your score the most.

01

Search engines can’t tell what you sell

Add structured data (LocalBusiness / Organization schema: address, hours, phone, ratings) so search engines show you with rich results.

02

No easy way to get in touch

Make it easy to enroll from the homepage — a visible form, booking link, or tap-to-call number.

03

Search engines have no map of your site

Publish /sitemap.xml and submit it to search engines.

What we read on your page

What a customer finds — and doesn’t

5 of the 8 things we could check are already on your page. Your page has 5 of the 8 things a customer looks for. Adding the rest is the quickest way to get more out of the visitors you already have.

Below is the breakdown: what's already working (with the exact text quoted from your page as proof), and the highest-impact additions to win more enrolments — in priority order.

Scope: an automated scan of the 3 pages we could read across your site. Every “found” item quotes the exact text on your page so you can verify it. It doesn't judge copy quality or design.

Already on your page

  • A headline that says what you do — found: “Spend less time starting over.”
  • An obvious button that starts the thing — found: “See pricing”
  • Reviews or proof from real customers — we found “Review”, which points at it, but no actual review or rating on the page we read
  • A concrete number, not an adjective — found: “3 +”
  • A price, or at least a from-figure — found: “$39”

What to add, in order of impact

  • Something that removes the risk of trying you — Lower perceived risk: free trial, money-back guarantee, no credit card, or cancel-anytime.
  • An easy way to get in touch — Give an easy capture path: short form, booking link, or contact route from the first screen.
  • Answers to the questions people ask before buying — Answer the top 3-5 buyer objections in an FAQ to remove hesitation before the CTA.

Deliverable

The full write-up

The full work-up for I built a Mac app to make technical PDF textbooks easier to study — every fix, with copy and code ready to paste.

Complete fix plan (every issue, step by step)

1. Search engines can’t tell what you sell

Add structured data (LocalBusiness / Organization schema: address, hours, phone, ratings) so search engines show you with rich results.

  1. Add JSON-LD using the schema snippet below, edited with your real details.
  2. Validate it in Google's Rich Results Test before publishing.
  3. Keep it in sync with the on-page facts (name, address, phone, offers).

2. No easy way to get in touch

Make it easy to enroll from the homepage — a visible form, booking link, or tap-to-call number.

  1. Add a visible booking link, short form, or tap-to-call number on the first screen.
  2. Keep the form to 3 fields max; every extra field drops completion.
  3. Confirm submissions with a clear success state, not a silent reload.

3. Search engines have no map of your site

Publish /sitemap.xml and submit it to search engines.

  1. Publish /sitemap.xml listing every indexable URL with <lastmod>.
  2. Reference it from robots.txt and submit it in Google Search Console.
  3. Regenerate it automatically whenever pages change.

Done-for-you assets — copy & paste

SEO title
Where to paste: Replace the <title> tag inside your page <head>.
Margin — PDF Study App for Mac
Meta description
Where to paste: In <head>, set <meta name="description" content="…"> to this (replace the old one).
Margin is a macOS PDF reader for students: annotate, save inline notes & resume study exactly where you left off. Try it today.
H1 — main page heading
Where to paste: Make this the single <h1> at the top of the homepage (real text, not an image).
Study Smarter on Mac — Keep Your Notes Inside Any PDF

— or one of these —
- Never Lose Your Place in a Textbook Again
- The PDF Reader Built for Deep Learning on Mac
Primary CTA button
Where to paste: Use as the main button on the first screen; repeat it after your proof/services section.
Get Margin
JSON-LD structured data (LocalBusiness)
Where to paste: Paste this entire block right before </head> (or before </body>).
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "LocalBusiness",
  "name": "I built a Mac app to make technical PDF textbooks easier to study",
  "url": "https://marginstudy.app/",
  "description": "Margin is a one-time-purchase macOS PDF reader (Apple silicon, macOS 14+) that lets students add, save, and navigate inline notes inside academic PDFs without altering the original file.",
  "makesOffer": [
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Inline annotation between lines of PDF text"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Persistent note-saving tied to specific passages"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Visual map of all notes across the entire textbook"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Resume study with one click to any saved note location"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Drag-and-drop PDF import without file relocation"
      }
    },
    {
      "@type": "Offer",
      "itemOffered": {
        "@type": "Service",
        "name": "Student pricing ($19) and lifetime license ($39)"
      }
    }
  ]
}
</script>

Page-by-page findings

PageWhat to fix
/looks healthy
/cdn-cgi/l/email-protectionblocked / unreadable
/resourceslooks healthy
/privacylooks healthy
Walk me through the 3 fixes - free

No charge and no pitch - a human reads your site and answers, usually the same day.

Rather we implement it for you? Done-for-you fix — €199

Action order

48-Hour Fix Plan

  • Add structured data (LocalBusiness / Organization schema: address, hours, phone, ratings) so search engines show you with rich results.
  • Make it easy to enroll from the homepage — a visible form, booking link, or tap-to-call number.
  • Publish /sitemap.xml and submit it to search engines.

Why it matters

The fastest students do not read every page. They scan the first screen, trust signals, pricing cues and how easy it is to enroll. Missing signals make the offer harder to understand and easier to ignore.

Packages

Turn this into more enrolments

You've seen the leaks, and the full plan above is yours free — every fix written out. The only thing we charge for is doing the work instead of you.

Do it yourselfFree

The complete evidence report and the prioritized, step-by-step plan for I built a Mac app to make technical PDF textbooks easier to study — every fix written out with copy & code ready to paste. It is on this page. Nothing to buy, nothing to unlock.

Read the full plan ↑
Done-for-you — 48h€199

We implement the highest-impact fixes for I built a Mac app to make technical PDF textbooks easier to study — metadata, schema, CTA, trust signals — in 48 hours. You keep every bit of the lift, no lock-in.

Have us do it — €199
Ongoing monitor€499/mo

Weekly re-checks of I built a Mac app to make technical PDF textbooks easier to study + drift alerts so the fixes compound and never silently slip back.

Start monitoring

Not sure which fits? Book a free 30-min call and we'll tell you straight. · 48-hour turnaround · no lock-in · every claim verified.

Verification

The exact wording we found

Every signal below was read from your live site — nothing is estimated. We checked 4 pages; “couldn’t verify” means a signal needs JavaScript to read and we won’t guess.

What we read

TitleMargin — Spend less time starting over.
Meta description172 chars
H1 heading Found 3/3
Structured data Missing

Crawl & AI files

robots.txt Found
sitemap.xml Missing
llms.txt (AI) Missing
Response time493ms

Pages we checked

/
Margin — Spend less time starting over.
Read
/cdn-cgi/l/email-protection
/cdn-cgi/l/email-protection
Blocked
/resources
Free textbook resources · Margin
Read
/privacy
Privacy — Margin
Read

Questions about anything in here? Reply to the email, or reach us directly — we answer the same day.

CalendlyEmail

Who we are

Tsoden — a full-service web studio

We don't just audit — we build and rank websites end-to-end. Web development & design, plus SEO & AEO, so your business shows up in Google and in AI answers like ChatGPT, Perplexity and Gemini. This report is where we start; we can implement every fix below and grow your visibility on a full-service basis.

Web development & redesign — fast, conversion-first sites
SEO — rank in Google for what your buyers actually search
AEO — get found & cited by AI answer engines (ChatGPT, Perplexity, Gemini)
Ongoing monitoring & growth — we keep it improving
Work with Tsoden →or email support@tsoden.ai

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Disclaimer

This service is a marketing and informational tool based on public website signals. It is not legal, financial, tax, investment, security, or professional advice. Scores and recommendations are estimates, not guarantees of revenue, rankings, AI visibility, deliverability, or business outcomes. You remain responsible for reviewing, approving, and implementing any changes and for complying with laws that apply to your business.

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This audit is from 17 Sept 2026 — we re-run it fresh before we touch anything I built a Mac app to make technical PDF textbooks easier to study · Grade C · 67/100
Done-for-you — €199 Walk me through the 3 fixes - free