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.
Turn your favorite photos into beautiful photobooks with Popsa, the world's fastest photobook app.
Free · 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 Popsa | Print Your Photos: map the core Photo & Video workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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: Limited customization options for prints
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent photo selection interface
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Long delivery times for prints
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High costs for premium features
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Turn your favorite photos into beautiful photobooks with Popsa, the world's fastest photobook app. • Each order takes just 5 MINUTES on average • Print up to 600 photos • Across up to 150 pages • Prices start from just $18 Download today to get 50% off your first order. __________ INSTANT LAYOUTS Popsa does the fiddly bits for you – instantly. Once you’ve picked your photos, our super-fast app creates your layout automatically. It does it all: • Picks the perfect template • Crops your pictures • Groups similar pictures together • Chooses the best colour scheme __________ FRAMED PHOTO TILES Create your own stickable photo tiles in seconds with Popsa. • No nails required! Our picture tiles come with adhesive backs for your walls • All of our photo tiles come ready-framed in high-quality black or white frames • Stick and restick as many times as you like • Mix and match – our photo tiles look great in groups • Add captions to your tiles (if you like!) • Made from an eco-friendly mix of 50% recycled polymers __________ CUSTOM CALENDARS It’s easy to make your own calendars with Popsa, too. • Our photo calendars come on 250gsm paper stock as standard • That’s seriously high quality paper – thicker than our photobooks! – and it makes every calendar feel special • Our photo calendars come uncoated, making them easy to scribble on • Your personalized calendar can cover any 12-month period. Whether it’s a late 2025 calendar that stretches into 2026, or a brand new 2026 calendar, you can make them all with Popsa. __________ AND THERE’S MORE Popsa has even more ways to enjoy your photos. • Create high-quality, individual photo prints • 7 sizes available • Choose from matte or gloss • Or turn your photos into Christmas ornaments! • Made from high-quality, polished acrylic or shatterproof glass __________ ALL YOUR PHOTOS IN ONE PLACE With Popsa, you can use photos from: • Your phone • Facebook • Instagram • Google Photos • Dropbox No more messing around with lots of different apps and accounts – with Popsa, it’s all under one roof. And with Google Photos, you can even search for specific images using keywords. ‘Greece 2020’. ‘Ginger kitten’. ‘Mum and Dad’. __________ PERFECT GIFTS Popsa photobooks and photo prints are thoughtful, personalized gifts for friends and family. And the best part? You did the hard work when you took the pictures! Just select your favorite memories: • Wedding snaps • Baby pictures • Family holidays • Birthday photos • Pet pics • ...It’s completely up to you And for the finishing touch, we can even gift box your photobook or ornaments for you. Just select the option at checkout. NOTE: We don’t include receipts with your delivery, so if it’s a gift, you can ship your photo album directly to the recipient. __________ QUALITY PRINTING Our state-of-the-art printers are renowned for their high quality standards. Choose from: Softcover Photobook • 200gsm paper • Medium and Large sizes • Matte or Gloss paper • 20-150 pages • From $32 Hardback Photobook • 200gsm luxury paper • Medium, Large and Extra Large sizes • Matte or Gloss paper • 20-150 pages • From $40 Photobooklet • 200gsm paper • 12-20 pages • From $18 __________ APP FEATURES • Create a photobook in just 5 minutes • Add captions to every page • (And emojis, too!) • See your book in 3D before you order • Choose from a wide range of templates • And hundreds of themes • Drag and drop photos in seconds • Pay in your preferred currency • Receive voucher-code discounts • Save your delivery addresses for future use • Pay with Apple Pay • Securely store your card details for 1-tap payments • Track your order seamlessly __________ SUPPORT We have a great support team on standby to help you out in the unlikely event that something goes wrong. Contact [email protected] and we’ll be with you as soon as possible. Happy printing! Popsa __________ Orders are currently being dispatched as normal.
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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.