Development of a cross-platform mobile application with analytical logic

Budget: 1200 USD Deadline: 12 days

What's with the full technical assignment? Backend? Design? I can do it without any problem, waiting for your response.

Budget: 35 USD Deadline: 1 day

Hello. I have extensive experience with Node.js. Ready to help with the backend.

Budget: 7000 USD Deadline: 40 days

I can fully implement this project — both a mobile app (iOS/Android) and a web version with integration of astrological logic, AI module, geolocation, and ephemeris. The architecture will be built considering scalability and security: Flutter for the frontend, Node.js or Python for the backend, OpenAI API, Swiss Ephemeris via proxy, integration of NASA data, and Stripe/Apple Pay/Google Pay for payments.

MVP (5–6 weeks):
A minimally viable version with one or two calculation scenarios, coordinate integration, ephemeris API, basic GPT module, personal account, and one payment system. UI — functional but simple.
💰 Budget: $5,000 – $8,000

Full version (2–3 months):
A complete application with full astrological logic, variable AI analysis, adaptive design, interactive UI graphics, push notifications, multiple calculation scenarios, multilingual support, analytics, a separate admin panel, and a web version (PWA or Next.js).
💰 Budget: $18,000 – $30,000

NDA — mandatory. After signing, I will prepare a phased plan, technical specifications, and sprints for a clear launch. Expand

Budget: 5000 USD Deadline: 30 days

Hello, Stanislav!
Your project is a technologically complex and conceptually precise tool, where everything must work as a single system. At Coderfy, we fully understand that what’s at stake is not just functionality, but accuracy, personalization, and user experience that must be error-free.
We are exactly “on topic” — here is how we will address your key tasks:
- Authorial calculation logic - You provide the algorithm — we document, implement, and cover it with autotests. We have experience working with complex business logic in sensitive areas (analytics, medical data, finance).
- Integration of NASA coordinates + Swiss Ephemeris - We will process geodata, time accounting, longitudes/latitudes, connect ephemerides. All calculations — strictly through the backend. Accuracy — priority №1.
- AI analytics via OpenAI - We work with GPT API, know how to structure requests and format responses to the required style — from short interpretations to in-depth analytical content.
- UI/UX according to your vision - Intuitive interface, personal accounts, responsiveness. We prepare a design system immediately considering scalability (for example, if you later add new blocks or sections).
- Flutter + Web (PWA) - One codebase — native quality on iOS, Android + modern web version. We have been developing this way for years — avoiding duplication and errors.
- Stripe / Apple Pay / Google Pay, Firebase analytics - We will connect payments, ensure security, save history, and at the same time provide you with analytics to monitor user behavior.

We are ready to offer two budget options. NDA — no problem. Your algorithm and idea remain protected.
We already have cases where it was necessary to combine AI, precise calculations, geo, complex logic, and cool UX. We would be happy to become a technical partner for implementing such an unconventional, unique product.
Ready to proceed with evaluation and dialogue. Expand

Budget: 1000 USD Deadline: 14 days

Hello

I am a developer in the field of ML/DL & Hybrid mobile applications. I am ready to complete your project. Write to me, let's discuss.

Budget: 300 USD Deadline: 1 day

Hello, Stanislav!

Your project looks very interesting and meaningful. We specialize in complex mobile solutions with AI integration, calculation logic, geodata, and creating adaptive interfaces — all of which are well within our expertise.

To provide a truly relevant estimate and prepare an optimal implementation plan, I have a few clarifying questions:
• Is there already technical documentation or an example formula to be implemented?
• What specific AI functions do you want to see in the MVP?
• How critical is the presence of a web version in the first release?
• What is the expected audience size at launch (to select the appropriate architecture)?

I am ready to dive into the project in detail after NDA. Looking forward to discussing all ideas to implement them as effectively as possible. Expand

Budget: 777 USD Deadline: 7 days

It will be done within a week, you will receive an ideal ready-to-use project. I have extensive experience in mobile applications.

Budget: 7000 USD Deadline: 60 days

Hello!
I will gladly take on your project!
Have extensive experience in this.
Write in private messages and check the portfolio

Budget: 5000 USD Deadline: 60 days

Good day, We are WebNeiro company, we specialize in applications and AI, we make contracts and work long-term.

Budget: 5000 USD Deadline: 1 day

Welcome! For a more accurate estimate, a detailed technical task is needed. We can implement your project, as our team generally possesses a wide range of technologies: Vue.js, REDUX, Typescript, MySQL, React, Python, PHP, HTML5, NodeJS, JavaScript, REACT NATIVE, CSS3, MongoDB, Postgres, Laravel, Symfony, Angular, Android, iOS. Examples of work, as well as details on budget and deadlines, can be discussed individually. We look forward to your feedback!

Budget: 3000 USD Deadline: 50 days

Hello! One of my educational backgrounds is in geodesy, so I understand calculations in minutes and seconds. I am also interested in astrology and numerology (Pythagorean matrix).
Therefore, I can complete the project not only considering all the requirements of the technical specifications but also providing ideas for improvement from the client's perspective.
It would be interesting to learn more about this:
- Interactive interface (UX/UI) with zooming capability.

Budget: 5000 USD Deadline: 30 days

Hello!

This project truly caught my attention. It’s a solid combination of smart logic, real-time data, and artificial intelligence. This is exactly what I enjoy creating because it stands for something meaningful, not just another app. Once you share the formula, I can build a system around it to ensure everything works according to how you want the results to function. I have already worked on projects that depend on time and location, so synchronization with geodata and ephemerides will not be a problem.

Regarding artificial intelligence, I can integrate ChatGPT in such a way that it genuinely adds value to the user, rather than just throwing text at them. The main thing is to maintain a clear flow and ensure that the AI feels useful and natural.

Flutter is a good option; it supports consistency both on mobile devices and on the web. I will make sure the design looks good and runs smoothly on all devices. Payments, user accounts, analytics — I have worked with all of these before, so we can implement them without slowing down the work.

As soon as we sign the non-disclosure agreement and I understand the logic, I can provide you with a detailed overview of both the MVP and the full version.

Thank you for your time! Expand

Budget: 4000 USD Deadline: 30 days

Hi, I'm writing in English since you're from London.

Thanks for the detailed breakdown. It's exactly the kind of project I enjoy working on, combining clean UX, data-driven logic, and AI in a meaningful way.

For the mobile and web versions, I would use Flutter to keep the experience consistent and fast across platforms, and tie it to a backend built in Python or Node depending on your data flow needs. Integrating Swiss Ephemeris and geolocation with NASA coordinates is very doable. I've done similar layering of external APIs and custom algorithms before.

I built https://elysianai.com and https://typefully.com using custom logic paired with OpenAI models to deliver real-time, adaptive responses. On https://doubtbuddy.com and https://thedesignersclass.cm, I focused on frontend and backend communication with personalized user flows, analytics, and payment systems.

I'd be happy to review the calculation logic and break down the estimate for both MVP and full version so we have a clear roadmap. NDA is totally fine, just send it over. Let me know how you'd like to begin.

Best Wishes,
Tamara Expand

Budget: 25 USD Deadline: 1 day

Hello, I am interested in your project and ready to take it on. I can complete it entirely. I would be glad to help you!

Budget: 100 USD Deadline: 1 day

Good afternoon. I have extensive experience in developing cross-platform mobile applications, including on Flutter.

Budget: 2000 USD Deadline: 30 days

Good afternoon,

My name is Artur, I am co-owner of SUBI Labs – a team of professionals creating reliable mobile and web solutions. We are ready to develop your cross-platform mobile application and web version with astrological calculations, integration of NASA API, Swiss Ephemeris, ChatGPT API, payments (Stripe, Apple Pay, Google Pay), and analytics (Firebase).

Our experience in developing complex analytical systems and intuitive UX/UI solutions guarantees quality and alignment with your tasks. We will sign an NDA and provide a budget estimate for the MVP and full version after discussing the details.

We suggest a call to clarify the requirements. Cost and timelines depend on the scope of the project.

Looking forward to your response!

Best regards,

The SUBI Labs Team Expand