iPhone and Android app

The Fillet Gauge app for iPhone and Android, built around your study buddy

Your study buddy brings tutor walkthroughs, my study plan and weak-spot quiz to your phone. Fillet Gauge already works in your phone's browser today, including the free 10-question check.

Tack AIyour Fillet Gauge study buddy
  • Tutor walkthroughsStep-by-step help on any question you answered, at your pace.
  • My study planA day-by-day plan built from your weakest domains.
  • Weak-spot quizQuiz yourself on what you missed, with spaced review so it sticks.
  • Mistake patternsSee what keeps tripping you up, and what to fix first.
  • Exam-day coachPlan your last week and walk in ready.
  • Explain this resultStep-by-step reasoning under our free calculators.
  • Ask why on practice testsFinish a practice test, then ask why on any answer.
  • My notesKeep your own notes next to your course.

Tack is AI. Check important details against your references.

The CWI Part A and CWI Part B and CWI Part C D1.1 and CWI Part C D1.5 and WPQ2 and API 1104 Part C and ICC S1 course works in your phone's browser today

The CWI Part A course

Available now · instant access

The CWI Part A course

  • 10modules of lessonsEvery task on the outline
  • 2full-length timed exams165 questions in 135 minutes each
  • 720practice questionsEach one explained
  • 5worked calculationsStep by step
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

Part A course$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

The CWI Part B course

Available now · instant access

The CWI Part B course

  • 7modules of lessonsEvery task on the outline
  • 3full-length timed exams46 questions in 120 minutes each
  • 354practice questionsEach one explained
  • 2worked calculationsStep by step
  • 21specification drillsFind it fast in the Book of Specifications
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

Part B course$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

The CWI Part C D1.1 course

Available now · instant access

The CWI Part C D1.1 course

  • 9modules of lessonsEvery task on the outline
  • 2full-length timed exams55 questions in 135 minutes each
  • 381practice questionsEach one explained
  • 8timed code lookups a setFind it fast in AWS D1.1, with your median time
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

Part C (D1.1) course with code-navigation trainer$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

The CWI Part C D1.5 course

Available now · instant access

The CWI Part C D1.5 course

  • 3modules of lessonsEvery task on the outline
  • 2full-length timed exams50 questions in 120 minutes each
  • 129practice questionsEach one explained
  • 18code-navigation drillsFind it fast in AWS D1.1
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

Part C (D1.5) course$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

The WPQ2 course

Available now · instant access

The WPQ2 course

  • 3modules of lessonsEvery task on the outline
  • 2full-length timed exams55 questions in 180 minutes each
  • 130practice questionsEach one explained
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

WPQ2 course$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

The API 1104 Part C course

Available now · instant access

The API 1104 Part C course

  • 3modules of lessonsEvery task on the outline
  • 2full-length timed exams60 questions in 135 minutes each
  • 129practice questionsEach one explained
  • 16code-navigation drillsFind it fast in AWS D1.1
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

Part C (API 1104) course$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

The ICC S1 course

Available now · instant access

The ICC S1 course

  • 8modules of lessonsEvery task on the outline
  • 3full-length timed exams60 questions in 120 minutes each
  • 218practice questionsEach one explained
  • 1week-by-week study planSet to your exam date

Turn a practice answer into a study step. In untimed practice, ask Tack AI about any question you answer, follow up, then see your weakest topics and what to drill next.

S1 course$99

Terms and refunds · Secure checkout by Stripe · Billed by Nori Software

See the plans

Compare plans

Every answer comes with a full explanation.

Want the native app too? Get notified

Get notified when it's ready

A quick confirmation now, then one email when it's ready.

A first look at the app

Where you stand, every dayDays to your exam and your score in each domain, with today's set aimed at the weakest.
Practice anywhereQuick sets of original questions, each answer explained.
Your plan in your pocketThis week's study and timed exam, in order.

What works on your phone now

Free 10-question checkTake the free check on any phone. If you stop partway, it picks up where you left off on the same phone.
Your courseOpen it from the link in your receipt email, on your phone or a computer. There's no password to remember.
Free toolsEvery free calculator and tool here works in a phone browser, so you can check a number on the job.

Add Fillet Gauge to your home screen

It then opens from an icon on your phone. The free check and the course install from the browser the same way.

iPhoneOpen filletgauge.com in Safari, tap the Share button, then tap Add to Home Screen.
AndroidOpen filletgauge.com in Chrome, tap the ⋮ menu, then tap Add to Home screen.