Stop losing money on Mobile App Prototype Designer projects.
Send your first 3 milestone payment agreements for free. Tired of clients exporting your Figma app prototypes to developers before paying the final invoice? Protect your mobile app design work with gated milestone payments.
No credit card required. Setup takes 30 seconds.
Build the agreement, add your deposit amount, and send one secure client link for signature and payment.
Statement of Work
Ref: 2026-001 • Standard Business Template
Project Milestones
The mobile app prototype design project is structured into sequential milestone stages. Work on any subsequent milestone will commence only after written approval and full payment link settlement for the preceding milestone are received through MicroFreelanceHub.
Deliverables by Phase
Deliverables are divided into the following fixed phases:
- Milestone 1: Discovery & User Flows: User flow diagrams, app architecture map, and initial layout wireframes for up to [Number] core screens.
- Milestone 2: High-Fidelity UI Design: Full-color screen layouts, typography scales, color palettes, and UI component library designed for [iOS / Android / Both].
- Milestone 3: Interactive Prototype: Clickable/tap-through prototype configured in [Figma / Adobe XD] demonstrating core user journeys, micro-interactions, and screen transitions.
- Milestone 4: Developer Handoff: Exported graphic assets, design system tokens, screen specs, and full edit/inspect permissions.
Approval Criteria
Deliverables will be submitted via review link. The Client has 5 business days to review each milestone submission and provide a consolidated feedback document or formal approval sign-off. Approval signifies that the current phase deliverables meet agreed requirements, locking that stage from further uncompensated edits.
Payment Schedule
Payment must be rendered according to the following structure via MicroFreelanceHub automated payment links:
- Deposit (Upfront): [Percentage/Amount]% due prior to project kickoff.
- Milestone 1 Payment: [Percentage/Amount]% due upon approval of Low-Fidelity Wireframes and User Flows.
- Milestone 2 Payment: [Percentage/Amount]% due upon approval of High-Fidelity UI Designs.
- Milestone 3 Payment: [Percentage/Amount]% due upon approval of Interactive Tap-Through Prototype.
- Final Milestone 4 Balance: [Percentage/Amount]% due prior to delivery of source files and developer inspect access.
Late Payment
If a milestone invoice payment link remains unpaid for more than 7 calendar days past delivery of the milestone sign-off, all design work, prototype hosting, and meeting schedules will be suspended immediately. A late fee of [Percentage]% per week will accrue on outstanding balances.
Change Requests
Any request for additional screens beyond the contracted count, platform variations (e.g., adding Material Design specs to an iOS build), or redesigns of previously approved milestones will require a formal Change Request. Change Requests will be quoted separately at a rate of $[Hourly Rate]/hour or as a fixed project add-on and billed upfront before execution.
Final Delivery
Full ownership rights, master Figma/Adobe XD source files, exported SVG/PNG graphics, and developer inspection permissions will be released to the Client strictly upon receipt of 100% of the total project funds through MicroFreelanceHub.
Uncontrolled Wireframe Feedback Loops
Clients treating interactive clickable prototypes as open-ended brainstorming tools, endlessly adding screens and altering user flows without approving past work.
Premature Developer Handoff
Clients or foreign dev teams using view/inspect permissions to build backend architecture while withholding the final UI design payment.
Dual-Platform Scope Inflation
Expecting native iOS (Human Interface Guidelines) and Android (Material Design) variants for the price of a single prototype platform.
What is a Mobile App Prototype Designer Milestone Payment Agreement?
A Mobile App Prototype Designer Milestone Payment Agreement divides UI/UX design into paid phases, such as wireframing, high-fidelity design, and interactive prototyping. It requires explicit client approval and milestone payment links before starting subsequent stages, protecting designers against unpaid scope expansion, endless revisions, and premature developer asset handoffs.
Built from real freelance projects
This template is based on real-world scenarios across freelance projects where unclear scope, missing payment terms, and revision creep led to lost revenue. It is designed to protect your time, define expectations, and ensure you get paid.
Why Mobile App Prototype Designers need a clear milestone payment agreement
Mobile app prototyping requires intensive user-flow mapping, UI component creation, and interactive trigger setup. Without a dedicated milestone payment contract, designers face endless UX revisions, scope creep, and premature asset handoffs to engineering teams before invoices are paid. Setting gated milestones ensures each project stage—from low-fidelity wireframes to interactive tap-through prototypes—is formally approved and paid before work on the next phase begins. MicroFreelanceHub combines contract terms, milestone approval records, and payment links into a seamless workflow. This structure establishes explicit boundaries around screen counts, platform guidelines (iOS HIG and Material Design), and revision limits. By requiring payment settlement before releasing Figma edit rights or developer inspect permissions, app prototype designers safeguard their intellectual property, maintain predictable cash flow, and ensure every design iteration is fully compensated.
Real-world scenario
A freelance UI/UX designer took on a $7,500 project to build a 15-screen mobile app prototype in Figma. After completing initial low-fidelity wireframes, the client asked for high-fidelity animations, micro-interactions, and full developer handoff tokens, claiming these were included in the original scope. Because the designer lacked a milestone agreement, work ground to a halt while $3,750 remained unpaid. With MicroFreelanceHub's Mobile App Prototype Designer Agreement, this scenario is prevented. The contract breaks the scope into three gated milestones: Information Architecture, High-Fidelity Component Design, and Interactive Prototype Handoff. When the client requested custom micro-interactions during Phase 2, the designer sent an automated Change Request through MicroFreelanceHub. Work on the interactive prototype stayed locked until the previous milestone payment settled and the extra scope was approved, ensuring zero unpaid work and clear client expectations.
🛡️ What this milestone payment agreement covers:
- ✓User Flow Diagrams & Information Architecture Map
- ✓Low-Fidelity Clickable Wireframes
- ✓High-Fidelity Mobile UI Kit & Design System Components
- ✓Interactive Tap-Through Prototype (Figma/Adobe XD)
- ✓Developer Handoff Package & Asset Exports
Best practices for Mobile App Prototype Designers
Restrict Figma Access Rights
Maintain 'Can View' access during initial milestone reviews. Release 'Can Edit' and developer inspect rights only after the final payment link clears.
Cap Interactive Screen Counts
Define the exact number of unique screens and overlay states included in each milestone to prevent unbilled app expansion.
Legal Disclaimer: MicroFreelanceHub is a software workflow tool, not a law firm. The templates and information provided on this website are for general informational purposes only and do not constitute legal advice.
Frequently Asked Questions
How can I prevent clients from handing my Figma prototype to developers before paying the final invoice?
Keep the prototype link on restricted 'View Only' permissions throughout the design process. State in your agreement that developer inspection rights, vector asset downloads, and source file transfers will only be granted once the final milestone payment link is successfully processed in MicroFreelanceHub.
What happens if a client delays feedback on interactive wireframes for weeks?
Your contract should include a 5-day Approval Window. If the client fails to provide actionable feedback or sign-off within 5 business days of receiving the prototype link, the milestone is marked auto-approved, or the project schedule is officially paused until outstanding invoices are settled.