Merlin Practice. Kestrel. FlightDeck Aptitude.
Buy the complete portfolio: CAT4 familiarisation, 11+ preparation and pilot aptitude training. The code, content, designs and six domains are included.
US dollars · Asking price for all three sites · Negotiable
Pilot aptitude training
Pilot selection preparation, from timed maths and reasoning drills to tracking and multitasking simulations.
Explore FlightDeck AptitudeAlready in the product
Independent training. No airline or assessment-provider affiliation, official selection score or pass guarantee.
Actual product screenshots. The live sites show the current experience.
The portfolio in numbers
Three different audiences. A working product for each.
CAT4 familiarisation
Reasoning practice for school admissions, with generated questions, worked answers and family accounts.
£29 / 31 days of access
One-off payment. No automatic renewal.11+ preparation
11+ practice in maths, English, verbal reasoning and non-verbal reasoning, with reports for parents.
£39 / 91 days of access
One-off payment. No automatic renewal.Pilot aptitude training
Pilot selection preparation, from timed maths and reasoning drills to tracking and multitasking simulations.
£24 / 7 days of access
One-off payment. No automatic renewal.Product inventory checked 20 October 2026. These are product counts, not customer or sales figures.
Source inventory checked 20 October 2026. Counts describe the products, not customers, sales or business performance.
Merlin: 8 question generators and 5 available levels. Kestrel: 10 active modules in 4 subjects. FlightDeck: 22 active modules; the 12 interactive tasks sit within its practice catalogue and are not 12 extra modules.
The 37 guides are 7 on Merlin, 14 on Kestrel (including 8 area guides) and 16 on FlightDeck. Translations and sustainability articles are excluded. Generated questions are not presented as an unlimited fixed question bank. Pass prices are in GBP; the acquisition price is in USD.
Revenue, profit and traffic figures are not published here. Ask for the available records before making an offer.
The engineering
Question generators, replayable simulations and payment handling. Select a system to see how it works.
Built into the portfolio
Real source.
Bounded excerpts.
Full review available privately.
export function applyChange(figure: Figure, change: Change): Figure { switch (change.kind) { case "rotate": return { ...figure, rotation: (figure.rotation + change.degrees) % 360 }; case "fill": return { ...figure, fill: change.to }; case "size": return { ...figure, size: figure.size === "small" ? "large" : "small" }; case "dots": return { ...figure, dots: figure.dots + change.by }; }}This function rotates a figure or changes its shading, size or dots. Combining these operations creates reasoning questions with a rule the answer can be checked against.
MerlinPractice/src/lib/cat4/generators/figure-matrices.ts:23
The suites check scoring, question generation, access, payments and saved results. Request the test reports and run them during your code review.
Test runs checked 20 October 2026. Shared checks are counted in each repository. This count is not a code-coverage percentage.
Next.js and TypeScript. Question and scoring logic is kept separate from the interface.
Server-side access checks. Paid access follows verified payment events, with handling for refunds and repeated events.
Three separate deployments. Each brand has its own hosting project, database and checkout configuration.
Try the simulation engine
This demo runs FlightDeck’s real control engine with a sample set of inputs. It then replays those inputs and checks that every result matches.
Run a 12-second sample and compare it with a replay of the same inputs. Both runs should produce an identical result.
Runs on your device using synthetic inputs. No account or learner data. The engine loads when you press Run.
What a buyer could do next
The sites are built. The next job is to bring in customers, learn what they need and improve the offer.
Merlin Practice
Offer practice alongside admissions advice. Start with a small group of families, then use their feedback to improve the guides and preparation support.
Kestrel
Use the existing practice modules between lessons. Trial a tutor-led package with one group before building school or organisation accounts.
FlightDeck Aptitude
Add practice to applicant coaching. Trial referrals with one training provider, then develop the drills applicants use and return to most.
Set up the buyer’s services. Check every paid offer and refund. Record traffic, sales and running costs.
Choose the site closest to your audience. Run a small tutor, adviser or flight-school trial and measure signups and purchases.
Use practice activity and customer feedback to choose the next features. Compare acquisition costs, refunds and support time before spending more.
These are options for a new owner to test. No partnerships, future sales or returns are promised.
What the asking price covers
$45,000USD · For the portfolio · Negotiable
Discuss the acquisitionThree repositories, original question content and generators, scoring logic, guides, designs and product assets.
Six listed domains, plus a walkthrough of the hosting projects, database setup, email and payment configuration.
A proposed two to four weeks to explain the systems and work through an agreed transfer and acceptance checklist.
Asset sale. The company, personal accounts and customer or child records are excluded unless separately agreed. Final scope is subject to contract.
Before you buy
The review should cover the business as well as the code. Here is the remaining work to include in the handover.
Move commercial operation to a suitable paid hosting plan. Complete analytics and purchase attribution so traffic and sales can be measured together.
A witnessed live purchase and refund of every offer remains an owner acceptance check. Agree the checklist and record the results before signing off.
Independent legal review of the terms, privacy notices and children’s-data paperwork is outstanding. Agree the asset and data transfer scope in writing.
Yes. US$45,000 is the negotiable asking price for the complete asset package: Merlin Practice, Kestrel and FlightDeck Aptitude, their source code, original content, designs and six listed domains. It is not a price per site. The final assets and transfer terms will be listed in the purchase agreement.
Ask for customer-redacted Stripe exports for each brand and the available traffic records. Revenue, profit, customer totals and conversion rates are not published here. The asking price is for the assets; it is not based on a stated revenue multiple or a forecast. Review the records before making an offer.
Yes. Request a private code review and a walkthrough of signed-in practice. Review the question generators, scoring, payment handling, database migrations, automated tests and deployment setup. The public engineering examples on this page are short excerpts from those repositories.
FlightDeck Aptitude Ltd and the seller’s personal accounts are excluded. Customer and child records are excluded unless separately agreed in writing. Transfer of the seller’s Stripe account is not assumed. Third-party services and open-source dependencies remain subject to their own terms and licences.
No. The sites sell one-off passes with a fixed access period. They do not renew automatically. A buyer needs new customers or repeat purchases to generate further sales. Tutor packages, school referrals and organisation licences are ideas to test, not existing contracts or promised income.
The proposed handover is two to four weeks, covering the codebases, domains, hosting, databases, email and checkout configuration. The proposed terms include 10% held for 60 days. These are discussion terms, subject to a signed purchase agreement and an agreed acceptance checklist.
Take a closer look
Request a product walkthrough, a private code review and the available financial records.
Request buyer informationhello@flightdeckaptitude.com