Consulting
Native app development for iOS and Android
We choose native Swift or Kotlin, or a shared Flutter codebase, around your product requirements. The agreed work can cover architecture, backend integration, testing and release preparation. Your team retains control of the repository and project accounts, with a documented handover.
What you get
- An agreed technical scope and architecture covering platforms, key user flows and integrations.
- An iOS app in Swift/SwiftUI, an Android app in Kotlin/Java, or a Flutter app when a shared codebase fits the product.
- Backend and API integration where included in the agreed scope, with clear boundaries between the app and existing systems.
- Test builds and checks of agreed user flows on target devices; accessibility, error handling and performance checks as scoped.
- Source code and a documented handover covering project setup, build and test steps, and any agreed release preparation. Your team retains access to its repository and project accounts.
How it works
- Agree the scope We agree platforms, user flows, integrations, acceptance criteria and whether native development or Flutter fits before development begins.
- Implement We build the agreed features in focused iterations and share test builds for your feedback.
- Check on devices We test agreed iOS and Android flows on the target devices. Edge cases, accessibility and performance are checked to the agreed scope.
- Document and hand over We hand over the repository changes and document setup, build and test steps, and any release preparation included in scope.
A good fit if
- You need an iOS or Android app whose requirements call for mobile-specific capabilities or workflows.
- You want help choosing Swift/SwiftUI, Kotlin/Java or Flutter based on platform needs and how much behavior can be shared.
- An existing app needs a more maintainable structure, clearer test coverage or a documented handover.
Choose Flutter or native for the product
Flutter can be a good fit when iOS and Android can share most product behavior and the team values one application codebase. Native Swift or Kotlin may fit better when platform-specific capabilities, existing systems or interaction requirements carry more weight. The choice follows your product constraints, not a default technology preference.
- Review platform requirements, backend and authentication touchpoints.
- Plan state, offline behavior, accessibility and performance around the main user journeys.
- Use the app cost calculator to explore a starting scope before requesting a quote.
Plan QA, releases and code ownership
Agree the platforms, supported flows and acceptance checks before implementation. Quality work can cover device behavior, error states, accessibility, performance and release configuration within the agreed scope. You retain the project repository and receive a handover appropriate to the work; store submission can be prepared, while Apple and Google make their own approval decisions.
- Define the iOS and Android journeys that need to work before release.
- Keep repository, signing and production account ownership clear with your team.
- For an inherited app, assess the codebase and takeover needs before changing it.
Case studies
Luna: a bedtime story where the child is the hero
A bedtime-story app for children around two to nine: parents choose people, pets, a genre and a lesson, and Luna makes the child the hero of a new read-aloud story.
Smart Clip: writing help inside the apps you already use
Smart Clip keeps writing help beside the text: grammar, translation, rewrites and replies from a keyboard, share extension or standalone app in 30+ languages.
Native iPhone client projects
Two published iPhone apps show client mobile-engineering work, with each case naming its platform, collaborators and delivered scope.
Nidra Technician
For Noctrix Health
Native iPhone app · Bluetooth Low Energy (BLE)
Mobile engineering with Noctrix Health
BLE band pairing, guided titration, programming and confirmation checks for a specialist-led setup workflow.
Cleaner Go
For Labhouse Mobile
Native iPhone app · on-device photo matching
Mobile engineering with Labhouse Mobile, alongside LabHouse and Inés Salvans
On-device duplicate and near-duplicate photo grouping with swipe review, keeper selection and undo.
FAQ
iOS, Android, or both?
Either or both. Swift or Kotlin can fit when the product depends on platform-specific features or existing systems; Flutter can fit when the main flows can share a codebase. We choose based on your requirements and maintenance needs.
Can you take over an existing app?
Yes. We'll review the existing codebase and agree the scope before changing it. See the app auditing or project rescue services.
Do you handle store submissions?
We can include build preparation, signing and store submission in the agreed scope. Apple and Google decide whether an app is approved; approval is not guaranteed. Any help responding to review feedback must also be agreed in scope.
Can you work with our US-based team?
Yes. Clutch Developer is based in Barcelona and works remotely with teams in the United States and Europe. Before work starts, we agree collaboration hours, payment arrangements, invoicing and any applicable taxes.
Contact
Request a quote for your app
Describe the main user journey, target devices and integrations. Tell us whether this is a new app or an existing codebase, and share your target date and budget range if known. Do not send passwords or customer data. We will use this brief to discuss scope before agreeing a quote.
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