Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
Jakdojade Premium is the ad-free version with GPS navigation and transfer alerts
$8.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Jakdojade Premium: map the core Travel workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Jakdojade Premium is the ad-free version with GPS navigation and transfer alerts. Plan your whole journey and buy train and city transport tickets. What you get with Premium: • No ads: use the app without banners or interruptions. • GPS navigation: the app guides you along the whole route, from the stop to your destination. • Transfer alerts: get a notification when it's time to get off or change. • Departures from the nearest stop: see the timetable for the stop you're at as soon as you open the app. One app, many possibilities: • Find a train and plan your trip: search intercity connections in PKP mode, compare departure times and check timetables, prices and on-board amenities. • Choose the best way across the city: see available public transport connections and tailor your route to your needs. • Buy train tickets in the app: pick a connection and buy a train ticket without using different operators' apps. • Travel by bus, tram and metro: buy the city ticket you need while planning your journey. • Keep your tickets with you: after purchase you can view them offline too. • React to changes on the way: track departures and delays and check service alerts. Why choose Jakdojade? • Fewer apps, more convenience: handle rail and city transport in one place. • A travel assistant on your phone: plan the whole route from the stop, through the station and the train ride, to your destination. • No waiting, no uncertainty: check train, bus and tram departures and delays as they happen. • Tickets here and now: buy a train or city transport ticket in moments. • Same prices and discounts: you pay the same as with the operator and get the same discounts. • Faster everyday planning: save home, work or school and keep your favourite connections at hand. Who is Jakdojade Premium for? For everyone who travels by train and city transport every day to work, school or university. Train tickets from Poland's major rail operators in one app: • PKP Intercity (PKP IC) • Polregio • Koleje Mazowieckie • Koleje Małopolskie • Koleje Śląskie • Koleje Dolnośląskie • PKP SKM w Trójmieście • Koleje Wielkopolskie Check any train connection in Poland, such as Warsaw – Kraków, Wrocław – Poznań or Warsaw – Gdańsk, as well as short regional journeys. Cities supported by Jakdojade (live timetables for most cities): Będzin, Białystok, Bydgoszcz, Bytom, Chorzów, Częstochowa, Dąbrowa Górnicza, Elbląg, Gdańsk, Gdynia, Gliwice, Gniezno, Gorzów Wlkp., Grudziądz, Inowrocław, Jelenia Góra, Katowice, Kielce, Kleszczewo, Kołobrzeg, Konin, Kostrzyn, Kraków, Leszno, Lublin, Łomianki, Łódź, Mysłowice, Niepołomice, Nowy Dwór Maz., Nowy Sącz, Olsztyn, Opole, Ostrów Wlkp., Pabianice, Piekary Śląskie, Piła, Poznań, Pruszcz Gdański, Pruszków, Radom, Ruda Śląska, Rybnik, Rzeszów, Siechnice, Siemianowice Śląskie, Słupsk, Sopot, Sosnowiec, Stargard, Swarzędz, Szczecin, Świnoujście, Tarnowskie Góry, Tarnów, Toruń, Tychy, Warszawa, Wejherowo, Wrocław, Zabrze, Zgierz, Zielona Góra Buy MPK, ZTM, MZK, PKP, SKM and other tickets in: Będzin, Bydgoszcz, Bytom, Chorzów, Częstochowa, Dąbrowa Górnicza, Gdańsk, Gdynia, Gliwice, GZM, Katowice, Kielce, Kleszczewo, Kostrzyn, Kraków, Leszno, Lublin, Łomianki, Łódź, Mysłowice, Niepołomice, Nowy Dwór Maz., Pabianice, Piekary Śląskie, Poznań, Pruszcz Gdański, Pruszków, Ruda Śląska, Siechnice, Siemianowice Śląskie, Sopot, Sosnowiec, Swarzędz, Szczecin, Świnoujście, Tarnowskie Góry, Trójmiasto, Tychy, Warszawa, Wejherowo, Wrocław, Zabrze, Zgierz, Zielona Góra Having the GPS turned on in the background can significantly reduce battery life. Terms of use: https://jakdojade.pl/public/pages/tos.html
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Difficulties in route planning during peak hours
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline capabilities
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent user reviews on subscription value
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Confusing UI for new users
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.