Build an indicative estimate from your own inputs.
The calculator creates a planning scenario and a copyable summary. It is not a fixed quote or guarantee.
Open the free calculator →Start with the app’s business job
A useful estimate begins with the customer or staff workflow the app must improve. A brochure-style app, appointment app, ecommerce app, field-service app and multi-tenant SaaS product have very different data, security and testing requirements.
Android, iOS and cross-platform decisions
One platform is usually cheaper than supporting both. Cross-platform frameworks can share much of the code, but platform-specific testing, store submission, notifications, permissions and device behaviour still require attention.
Backend, APIs and admin panel
Many app budgets are underestimated because the visible mobile screens are only one part of the product. Authentication, database design, APIs, payments, notifications, roles, reports and an admin panel may require as much effort as the app itself.
Payments, subscriptions and store accounts
Payment integration needs server-side order creation, verification, webhook handling and failure recovery. Apple and Google developer accounts, transaction fees and subscription rules are third-party costs controlled by those providers.
Design, accessibility and device testing
Custom UI/UX, responsive layouts, dark mode, accessibility, multiple screen sizes and older devices increase design and quality-assurance effort. A reusable design system reduces inconsistency during future releases.
Security and regulated workflows
Apps that handle health, finance, identity, children, sensitive documents or staff permissions need deeper security and compliance planning. Encryption, audit logs, access controls, backups and incident handling should be defined before development.
Maintenance after release
A mobile app is not finished when it reaches the store. Operating-system updates, library upgrades, crash monitoring, analytics, security patches, store policy changes and product improvements require an ongoing support plan.
Common questions
No. It is a planning model. A quotation requires confirmed requirements, responsibilities and acceptance criteria.
Yes, when the first release has a focused scope, realistic design and clear ownership. Low price becomes risky when critical work is silently excluded.
It should identify deliverables, exclusions, milestones, payment terms, technology, deployment, credentials, testing, support and change-request handling.
Kailvex can review the requirement, identify a maintainable first phase and prepare a scope-based proposal.