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.
App Overview
PhotoGrid: Video Collage Maker
This is the best Collage App to create stunning images for social media, like Instagram, TikTok posts and stories, Facebook posts, banners and covers, YouTube thumbnails, and Pinterest collections.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
118,319 ratings · Top 5%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for PhotoGrid: Video Collage Maker: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
This is the best Collage App to create stunning images for social media, like Instagram, TikTok posts and stories, Facebook posts, banners and covers, YouTube thumbnails, and Pinterest collections. •Create memory collages with ease •Create amazing social media content •Grow a new business Feature Highlights Video Editor & Video Grid Maker • Combine photos and videos to make video grids, trim your video easily! • Best Instagram video and photo editor, add blurred backgrounds without cropping them or adding unexpected watermarks! •You can synchronize your video clips so that they are all aligned to the same moment in time. •Up to 9 Videos. Social-Media Marketing Tool • Watermark: Customize your own logo and Watermark, add Instagram, Facebook, WhatsApp logo easily with your name. • Ratio: Tons of popular ratios including Facebook cover, Apple Watch, A4, A3 sizes, and more which allows you slay on social media! • Text: Add any font you want and add beautiful curved texts on your photo. The most complete collage app •20000+ different collage templates. Re-mix up to 16 of your photos at a time to create fun, personalized layouts, and collages. • Design your own photo creations! Make beautiful filmstrip and cool photo stitches! • You can also personalize your own scrapbook with freestyle pic stitches! Happy scrapbooking! Powerful photo editor •Crop, rotate, resize, blur, and beautify your photos easily, you can even frame your images in Instagram's 1:1 aspect ratio! • Add stickers, text, backgrounds, graffiti, boarders, and mosaic, or adjust the brightness, contrast, saturation, and layout of your photos! • Convert a raw photo into a powerful image all in one app. You can also customize templates to suit your needs! = Contact Us = • Email: [email protected] PHOTOGRID PREMIUM PLAN Functions • Access to 20000+ Elements • Create VideoGrids up to 15 minutes long. High-quality full HD 4K VideoGrid. • Freely decide aspect ratio for your photo • Enjoy an ads-free experience • Share with friends without any watermarks Billing • Payment: - Payment will be charged to iTunes Account at confirmation of purchase. - All premium plans will be auto-renewed at the end of each period. - Cancellation must be made at least 24 hours before the end of the valid period to avoid a nonrefundable auto-renewal. - Cancellation requests made prior to the end of the period will become effective at the end of that period term. - You can manage and turn off auto-renewal in your Apple Account Settings. • Premium Plan Choices - Initiation or termination of a premium plan must be done through the iTunes App Store, which may be subject to a sales tax in your area. Note: you are responsible for checking the Terms of Service of your app store for detail and applicability of sales tax. • Refund Please be aware that refund is NOT available after purchase. Other • 2025 PhotoGrid.app reserves the right to adjust the pricing for its products and services in the future. • Terms of Use: https://media.grid.plus/doc/grid_plus_terms_of_service • Privacy Policy: https://media.grid.plus/doc/grid_plus_privacy_policy
Written user reviews are not shown here. Check current App Store reviews >
Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Include more customizable filters and user-generated options.
Assumption to check: Limited filter options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement better error handling and stability improvements.
Assumption to check: Occasional crashes during video processing
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the subscription model and clarify premium features.
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image handling and storage for better performance.
Assumption to check: Performance issues with large image files
Validate with people who use this workflow before building.
Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Advanced
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.
