TurboKast Studio › Fixed-price app development
Fixed-price app development for Scottish small businesses.
A written price, a written definition of “done”, and payment in stages. Web apps, booking systems and automations from £249, from a Dundee studio working across Scotland and the UK.
or coffee on Liam in Tayside or Fife · talk to Kirsty · see prices
- Dundee companyTurboKast Ltd SC881077
- Fixed pricesWritten quote first
- Pay in stagesNo big upfront bill
- You own your dataCode and hosting in your accounts
- Professional indemnity and public liability insured
What “fixed price” means here
Plenty of developers quote a day rate and an estimate. That leaves you carrying the risk if the job runs long. We do it the other way round:
- A free 15-minute call (or a coffee in Tayside or Fife), where you tell us what is slow.
- A written fixed quote, free and yours to keep whether or not you go ahead, with a one-page Scope and Success Criteria Schedule: what we build and what “done” means, each item a plain pass or fail.
- No Schedule, no start. We do not begin until you have agreed it in writing.
- The price is fixed for that scope. Anything outside it is a change that we price in writing before doing it.
- You see working software every week and pay in stages, not all up front. The finished job is tested against the Schedule before you are asked for the last payment.
Conditions apply to every guarantee and refund promise on this page. They are in our written order terms (Scots law, business customers only), which come with every quote. If this page differs from the terms, the terms win. Last reviewed 2 November 2026.
The price ladder, and what each step is
Six small jobs on what you already have: Google profile, price list, contact form, a Book now button, broken links, mobile fixes. Agreed in one short email.
Pay after the job is done. See the six fixes and their prices
When you miss a call, the caller gets a text from you with your booking link, and you get their details.
Free for the first 14 days. How it works
One narrow job: an enquiry or order form that logs and replies, a reminder or report automation, a dashboard from numbers you already keep.
Pay nothing until it works (jobs booked before 30 November 2026). Not live in 10 working days? You owe nothing (conditions apply).
One job done properly: a quote calculator, a booking form with a diary, an order system, a job board with a phone view.
A success criterion not met in the 30 days after go-live? We fix it or refund you (conditions apply).
Several connected parts: jobs, rota, quotes, bookings or orders, customer records, a phone view for staff.
Paid in stages against milestones, with 90 days of free fixes after go-live.
A 15-minute call or a coffee, then a written fixed quote. No obligation.
Optional: monitoring, backups checked, security updates and fixes. Cancel with 30 days’ notice.
Care, plus up to 2 hours of changes a month and a quarterly review. Cancel with 30 days’ notice.
Conditions and small print
Conditions apply to every refund or fix promise on this page. The clock pauses while we are waiting for something from you, and you have to claim within set windows. The conditions are in our written order terms (Scots law, for business customers only), which come with every quote; ask for a copy at any time. If anything on this page differs from the terms, the terms win. Fix One Thing booked before 30 November 2026 is paid for only after it is live and working (invoice after go-live, payable within 7 days; if it does not work in the first 5 working days after go-live, we fix it or you owe nothing). After that date it is paid half to book and half when it is ready. Larger projects are paid in stages set out in the quote. Hosting and third-party charges (for example email sending) are paid by you or passed on at cost, and the quote lists them up front. We are not VAT registered, so the prices above are what you pay. Care+ includes priority in our queue (not a guaranteed response time).
If an accountant or bookkeeper introduced you, we may pay them 10% of the build price after you have paid in full. You do not pay it, your price is the same, and the quote names the introducer and the fee before you accept.
Typical jobs at each price
- Fix One Thing, £249: an enquiry or order form that logs every entry and replies to the customer; a reminder or weekly report that goes out on its own; a dashboard built from numbers you already keep. One job, described in one sentence. See Fix One Thing.
- Single-job tool, from £749: online booking with a diary (custom booking systems), a quote calculator, an order system, or a job board with a phone view. One job done properly.
- Business hub, from £1,490: several connected parts, such as jobs, rota, quotes, bookings or orders and customer records, with a phone view for staff. Our live example replaced three spreadsheets. See also turning a spreadsheet into a web app.
What is not included, and what can change the price
- Changes outside the Schedule. A new feature or a second job is a change. We give you the price and the effect on the dates in writing, you accept it by email, and only then do we do it.
- Third-party costs. A domain, hosting, email or text sending, payment provider fees and other services are yours, in your own accounts, and the quote lists each one and who pays. We are not VAT registered, so the prices here are what you pay.
- Anything after the free-fix period. Fixes are free for 30 days after go-live (90 for a hub). After that, an optional care plan is £29 a month, or £79 with up to 2 hours of changes, cancellable with 30 days’ notice. New features are quoted separately.
- A job that is too big or too vague to fix a price for. We say so on the call and suggest the smallest clear piece to start with.
What you own, and the honest risks
The code, hosting and domain are set up in your own accounts from day one, so we cannot lock you out. When you have paid in full, and any refund window has ended, we assign you the rights we own in the custom code we wrote for you. There are no per-user fees from us.
The risks, stated plainly: you deal with one person, Liam Humphreys, and we do not yet have a named backup developer. We build with AI coding assistants, directed by Liam and checked by automated tests, and we review the changes before handover. TurboKast Ltd holds professional indemnity and public liability insurance with Chiswell, through Simply Business; we do not hold a separate cyber policy. The terms say what happens if Liam cannot continue.
Where we work
- Dundee, Angus, Perth and Kinross, and Fife: a free coffee face to face near you, any weekday 9:30 to 16:00, or a free 15-minute call. Book a coffee.
- Elsewhere in Scotland, for example Edinburgh, Glasgow, Aberdeen or the Highlands, and the rest of the UK: a free 15-minute call by phone or video. Book a call.
- The build is remote for everyone, with working software shown every week.
We are based in Dundee, so we are quickest to meet in Tayside and Fife. Nothing about the work depends on where we sit, because the code, hosting and domain are in your own accounts. More on Dundee and Fife, Perth and Angus. Our registered office is 29 Commercial Street, Dundee DD1 3DG; we do not meet clients there.
A system we have built
Green Palm Dundee Landscaping, a firm of about seven staff, had jobs, the rota and quotes in three spreadsheets. We built one web app for the office and for crews on their phones, with invoices through QuickBooks. It is live. We are not publishing time-saved figures.
How a job runs
Talk for 15 minutes, free
A call, or a coffee if you are in Tayside or Fife. You tell us what is slow. If a ready-made tool would do, we say so.
Get a written fixed quote
What we build, what it costs, and what “done” means. Free, and yours to keep whether or not you go ahead.
We build it, you pay in stages
You see working software every week. The code, hosting and domain are in your own accounts from day one. Care plans are optional.
Questions people ask first
What does fixed price app development mean?
You get a written quote with the price, the scope and what “done” means before work starts, and the price is fixed for that scope. It does not rise because the job takes longer than we thought. It does change if you ask for something outside the written scope, which we price in writing first.
What can change a fixed price?
Only a change to the scope, and only with your written agreement. Anything outside the written Scope and Success Criteria Schedule is a change, however small it seems: we tell you the price and the effect on the dates in writing before doing it, and we never do unquoted work and invoice it afterwards. Third-party costs (domain, hosting, email or text sending, payment fees) are separate, in your own accounts, and listed in the quote.
How can you fix prices lower than a typical agency?
We build with AI coding assistants directed by Liam and checked by automated tests on every change, and we keep each job small and clearly defined. There is one person to deal with, not an account manager. The trade-off is that we do not yet have a named backup developer, so the code, hosting and domain sit in your accounts and a continuity pack is kept in your repository, so any competent developer can take over.
Do you only work in Dundee?
No. We are based in Dundee and meet face to face anywhere in Tayside or Fife. The build is done remotely, so we work with small businesses across Scotland and the rest of the UK. Our written terms are under Scots law and for business customers only.
What if the job is too vague to fix a price?
We say so, and suggest the smallest piece that is clear, often a Fix One Thing at £249, rather than guess a figure for a large vague job. The written quote and the first 15 minutes are free, whether or not you go ahead.
What do I pay, and when?
Larger jobs are paid in stages set out in the quote, with the first payment before we start. For Fix One Thing jobs accepted before 30 November 2026 you pay nothing until it is live and working; after that date it is half to book and half when it is ready and tested. The exact wording is in the written order terms that come with every quote, and those terms win over this page.
What if something does not work?
A Fix One Thing or single-job tool has 30 days of free fixes after go-live, and a business hub has 90 days, for anything that does not do what the written Schedule says. Fix One Thing and single-job tools also carry the fix-or-refund promises shown in the price table (conditions apply). A business hub does not have a refund guarantee.
You deal with Liam
TurboKast Studio is run by Liam Humphreys, in Dundee. We build with AI coding assistants, directed by Liam and checked by automated tests on every change, which is how we can quote fixed prices below typical agency rates. You deal with one person, not an account manager, and the terms say what happens if Liam cannot continue (we do not yet have a named backup developer).
- Company
- TurboKast Ltd, registered in Scotland, company number SC881077
- Registered office
- 29 Commercial Street, Dundee, DD1 3DG
- [email protected]
- Phone
- 01382 787280
Answered by Kirsty, our AI assistant, who can book you a call with Liam. Calls are recorded. It is a landline, so texts do not arrive: to message us, use WhatsApp on the same number. You can also talk to her in your browser. - VAT
- Not registered
- Terms
- Written order terms (Scots law, business customers only) come with every quote, and guarantees are subject to them (conditions apply). Ask for a copy.
- Insurance
- Professional indemnity and public liability insurance with Chiswell, through Simply Business (the limit and terms are given with every quote). We do not hold a separate cyber policy.
Tell us what is slow. 15 minutes, free.
We will say honestly if we can help. No pitch deck, no obligation. If a ready-made tool does the job, we will tell you.
Or email [email protected] and we will reply with times. 01382 787280 is a landline: texts do not arrive, so message us on WhatsApp on the same number.