Invoice & Billing Maker iOS App
Mobile app
Mobile invoicing app that helps freelancers and small businesses create, send, and manage professional invoices
Published on
July 16, 2026


$2,500
Asking Price
Main Metrics
$319
ARR
10
Customers
2026
Launched
$2,500
Asking Price
Already Sold
Main Metrics
$319
ARR
10
Customers
2026
Launched
Overview
<p><b>Startup Description</b></p><p>My product is a native iOS invoice and billing application designed for freelancers, contractors, self-employed professionals, and small businesses.</p><p>The app helps users create, customize, manage, and share professional invoices directly from their iPhone. The project was created to provide small business owners with a simple and mobile-first alternative to complicated accounting and invoicing platforms.</p><p>It was published on the App Store on May 14, 2026, and began generating subscription revenue shortly after launch.</p><p><b>Key Highlights</b></p><ul>
<li>$319 revenue generated in June 2026, the app’s first full month after launch</li>
<li>10 active subscription plans</li>
<li>7 annual subscription plans</li>
<li>3 weekly subscription plans</li>
<li>Approximate annualized revenue run rate of $3,828, based only on June performance</li>
<li>Live and monetized application available on the App Store</li>
<li>Recurring subscription business model</li>
<li>No paid third-party APIs required</li>
<li>Subscriptions managed through Adapty</li>
<li>Native iOS application with a Python backend</li>
<li>Website and domain included</li>
<li>Full source code and technical infrastructure included</li>
<li>Technical documentation and post-sale support provided</li>
</ul>
<p>Because the app was launched recently, long-term metrics such as churn, LTV, CAC, retention, and annual profit have not yet been established. The current results represent early-stage traction rather than mature financial performance.</p><p><b>Team</b></p><p>The project is currently managed by the owner with technical support from iOS and backend developers when updates or maintenance are required.</p><p>The application does not require a large operational team. A buyer with an existing mobile development team can integrate the product into their portfolio quickly. Alternatively, individual Swift and Python developers can maintain the application when necessary.</p><p>The seller will assist with the technical handover and explain the application structure, backend, Firebase setup, subscription configuration, and website infrastructure.</p><p><b>Tech Stack</b></p><ul>
<li>Swift and UIKit for the native iOS application</li>
<li>Python for the backend</li>
<li>Firebase for application infrastructure and related services</li>
<li>Adapty for subscription management and paywall configuration</li>
<li>Google Analytics for website and traffic analytics</li>
<li>Dedicated application website and domain.</li>
</ul>
<p>There are no paid external API dependencies. This keeps the technical structure straightforward and reduces ongoing operating expenses.</p><p>The buyer will also receive documentation covering the backend and Firebase structure, making it easier for the buyer or their developers to understand and maintain the project.</p><p><b>Marketing and Growth</b></p><p>The application is still at an early stage and has not yet completed a full marketing and growth optimization cycle. Its current results were generated during the initial period following the App Store launch.</p><p>A new owner has several opportunities to increase downloads and subscription revenue:</p><ul>
<li>Improve App Store Optimization</li>
<li>Launch Apple Search Ads campaigns</li>
<li>Localize the app into additional languages</li>
<li>Expand into new geographic markets</li>
<li>Test new screenshots, previews, icons, and paywalls</li>
<li>Add more invoice templates and customization options</li>
<li>Introduce recurring invoices and payment reminders</li>
<li>Add expense tracking, reports, and business analytics</li>
<li>Use paid social media campaigns</li>
<li>Cross-promote the app through other business or productivity applications</li>
<li>Optimize weekly and annual subscription pricing</li>
</ul>
<p>The product is suitable both as a standalone business and as an addition to an existing portfolio of finance, productivity, document-management, or small-business applications.</p><p><b>Revenue and Profit</b></p><p>The app generated $319 in revenue in June 2026, its first complete month after publication.</p><p>The app currently has 10 active subscription plans:</p><p>-
7 annual plans</p><p>-
3 weekly plans</p><p>Based on June revenue, the simple annualized revenue run rate is approximately $3,828. This is an indicative run rate based on one month and should not be considered established historical ARR.</p><p>There are no paid API expenses. The main operating costs may include:</p><ul>
<li>Apple’s applicable commission</li>
<li>Apple Developer Program membership</li>
<li>Basic backend and infrastructure expenses</li>
<li>Future development and maintenance</li>
<li>Optional marketing expenses</li>
</ul>
<p><b>Return on Investment</b></p><p>A buyer can potentially shorten the payback period by improving App Store Optimization, launching Apple Search Ads, localizing the product, testing subscription pricing, improving onboarding, and adding new invoice-management features.</p><p>The buyer is acquiring a functioning and monetized product rather than starting development from zero, which can significantly reduce time-to-market and initial development risk.</p><p><b>Startup Assets</b></p><ul>
<li>Published iOS application</li>
<li>Existing App Store listing</li>
<li>Existing active subscription base</li>
<li>Complete iOS application source code</li>
<li>Complete backend source code</li>
<li>Complete website source code</li>
<li>Application website</li>
<li>Domain</li>
<li>Adapty project and subscription configuration</li>
<li>Firebase project and configuration</li>
<li>Google Analytics property</li>
<li>Relevant technical and operational information</li>
<li>Backend and Firebase documentation</li>
<li>Assistance with transferring the application and related assets</li>
<li>Post-sale technical support during the transition</li>
</ul>
<p>The documentation will explain how the backend and Firebase infrastructure work, allowing the buyer or their development team to continue operating and developing the project more easily.</p><p><b>Risks</b></p><ul>
<li>Limited financial history because the app was launched in May 2026</li>
<li>Churn, retention, CAC, and LTV are not yet fully established</li>
<li>Dependence on Apple’s App Store policies and review process</li>
<li>Competition within the invoicing and small-business app category</li>
<li>Ongoing need to maintain compatibility with future iOS versions</li>
<li>Revenue may fluctuate before stable acquisition channels are established</li>
<li>A significant portion of current subscriptions consists of annual plans, so monthly cash flow may vary</li>
</ul>
<p>These risks can be reduced by maintaining App Store compliance, monitoring subscription analytics, improving onboarding, regularly updating the application, diversifying acquisition channels, localizing the product, and continuing to test pricing and paywalls.</p><p><b>Summary</b></p><p>It is an early-stage but already monetized iOS subscription application with active paying users, a complete technical infrastructure, and no expensive paid API dependencies.</p><p>The buyer receives a published application, existing subscription revenue, complete source code, backend, website, domain, Firebase, Adapty, Google Analytics, documentation, and post-sale support.</p><p>The project is particularly attractive for buyers who already operate productivity, finance, document-management, or small-business applications and can use their existing development and marketing resources to accelerate growth.</p><p>Instead of spending months building and publishing a new product, the buyer can acquire an operating application with validated demand and begin focusing immediately on optimization and scaling.</p><p>✅ $319 TTM revenue</p><p>✅ 10 customers</p><p>✅ Business model: SaaS</p><p>✅ Built with Swift, Python, UIKit</p>
$319
Annual Revenue
10
Number of Customers
Expenses
Backend and Website hosting - apprx 10 EUR per month.
Business Model
Subscription-based iOS app monetized through weekly monthly and annual plans.
Target Audience
Freelancers, contractors, self-employed professionals, and small businesses.
Asking Price Reasoning
The $2,500 price is supported by existing revenue, 10 active subscribers, complete source code, backend, website, domain, infrastructure, and post-sale support.
Reason for Selling
We are an app development studio, and building, growing, and selling apps for capital gains is a core part of our business model.
Growth Opportunity
Scale through ASO, Apple Search Ads, localization, paywall optimization, and new invoicing features.
30 days free support from seller
Competitors
Invoice Simple, Invoice2go, Bookipi, Tiny Invoice, and Zoho Invoice.
Tech Stack
Swift, Python, UIKit.
Traffic Metrics
Revenue Metrics
How it works
$2,500
Asking Price
Already Sold
Main Metrics
$319
ARR
10
Customers
2026
Launched

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