Product flows
Thumb-first journeys prototyped on-device before engineering kickoff.
Service 04
App Development, Prototype to Store
We turn product vision into iOS and Android experiences — polished UI, shared design language, and the discipline to actually ship.
app development
App Development
iOS+AND
Store-ready platforms
8–16
Weeks for a focused v1
4.5★
Store-quality bar we design to
0
Shared design language
The work
AppDevelopment
The4Loop builds mobile apps as products, not slide decks. Flows are prototyped on-device, engineering follows a shared design system, and release, analytics, and store requirements are part of the plan. For fully bespoke builds, see our custom mobile apps practice.
- iOS and Android UX with a shared design language
- On-device prototyping before engineering kickoff
- Analytics, push, and offline-ready patterns
Engagement
- Typical timeline
- A focused v1 typically spans eight to sixteen weeks. Store review sits on top of that.
- Investment
- App programs usually land in Professional or Enterprise after a scoped discovery.
Figures describe typical ranges for this practice. Scope and numbers lock in discovery — not in the brochure.
Get a scoped quoteWhat we build
Deliverables,notvibes
UI system
A shared language for iOS and Android so the two stores do not drift.
Engineering
Native or cross-platform — chosen for UX, timeline, and what you share with web.
Release discipline
Versioning, crash reporting, and a checklist that survives App Review.
Analytics & push
Instrumentation and messaging patterns that are useful on week two, not just at launch.
Store package
Listings, screenshots, review notes, and the assets reviewers actually look at.
How we work
Apathyoucantrack
01
Scope the v1
We cut the story to a shippable first version — not a three-year roadmap in disguise.
02
Prototype
Flows on a real device. Stakeholders tap, not guess from a slide.
03
Build
Engineering against the design system with weekly builds you can install.
04
Release
Store submission, monitoring, and a short hardening pass after the first reviews.
Fit
Who this is for
- Teams with a clear v1 — not a wishlist of thirty features
- Products that need both stores without two unrelated apps
- Founders who have been stuck in prototype-land for months
Stack we use
SwiftKotlinReact NativeExpoTestFlightPlay Console
Tools are chosen for the job — not for a logo wall. If a simpler stack is enough, we will say so.
Testimonials
Partners,notvendors
The same senior team from brief through launch — on this practice and the ones around it.
“The4Loop behave like an embedded product team, not an agency on the sidelines — strategy, design, and engineering in one thread.”
AC
Amelia Cho
CEO
“We needed craft and serious engineering in one partner. They shipped a web experience and a mobile suite that finally matched the ambition of the product.”
MT
Michael Torres
Founder
“Their AI practice is unusually pragmatic — clear guardrails, thoughtful UX for model outputs, and documentation a compliance team can actually use.”
EW
Emma Williams
CTO
FAQ
AppDevelopmentquestions
Scope, timeline, and how the work actually runs — before you book a call.
Both. We choose native or cross-platform based on UX, timeline, and how much logic you need to share with a web product.
Related
Keepexploring
Custom Mobile Apps
Custom iOS and Android apps built around your product — not a template — from prototype to App Store and Play Store.
View serviceMobile Game Development
Production-ready multiplayer and mobile game development — matchmaking, live sessions, progression, and store launch.
View serviceCustom Web Apps
Custom web application development on modern stacks — dashboards, portals, and internal tools shaped around how you actually work.
View serviceThe4Loop — ready when you are
Readytostart?
AppDevelopment
Tell us the outcome you need — we will reply within one business day with a clear next step.
Free consultation
24h response
Senior specialists