Product definition
The jobs the app must do that a website or off-the-shelf tool cannot.
Service 10
Custom Mobile Apps
Off-the-shelf apps force your process into someone else's product. We build custom iOS and Android apps that match how you sell, serve, and operate.
custom mobile app development
Custom Mobile Apps
10–20
Weeks, prototype to stores
2
Stores — App Store & Play
bespoke
UX — not a white-label shell
0
Design language with your web app
The work
CustomMobileApps
The4Loop ships custom mobile apps as dedicated products: unique UX, shared design language with your web app, and a path through store review. App development covers the craft of shipping; this practice is for teams who need a bespoke mobile surface, not a white-label shell. Proof on this site: Preston (US–DR remittance) and Sequence Rivals (a production mobile game — game work also lives under Mobile Game Development).
- Bespoke mobile UX for your workflows and brand
- Native and cross-platform builds with shared design language
- Store submission, analytics, and post-launch iteration
Engagement
- Typical timeline
- Bespoke apps typically run ten to twenty weeks including store review. Dual-platform is planned, not bolted on.
- Investment
- Custom mobile sits in Enterprise more often than Starter. Discovery produces a store-dated plan.
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
Custom UX
Flows drawn around your process — field, floor, or customer-in-hand.
Native-quality UI
Platform conventions respected, brand still unmistakable.
Offline & device
When the job happens without signal — logging, queues, and sync you can trust.
Store launch
Listings, privacy nutrition, review notes, and the wait built into the plan.
Post-launch slice
Crash triage and the first feature increment after real usage, not imagined usage.
How we work
Apathyoucantrack
01
Prove it needs an app
If a PWA is enough, we will say so. Custom native is for when the device is the product.
02
Design the job
On-device prototypes with the people who will live in it.
03
Engineer
Shared design with web where it helps; native where the platform demands it.
04
Ship both stores
Submission, review, and a monitoring window. Then the first real-world patch.
Proof
Workthatalreadyshipped
Fit
Who this is for
- Operations that happen in the field, on a shop floor, or in a pocket
- Consumer products that cannot be a wrapped website
- Teams who already have a web app and need a first-class mobile sibling
Stack we use
SwiftKotlinReact NativeStoreKitPlay BillingCrashlytics
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
CustomMobileAppsquestions
Scope, timeline, and how the work actually runs — before you book a call.
We plan for the stores your customers actually use. Shared design and, where it helps, shared logic keep the two platforms from drifting.
Related
Keepexploring
App Development
Native-quality iOS and Android experiences — from first flow to store release — with release discipline and store-ready polish.
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?
CustomMobileApps
Tell us the outcome you need — we will reply within one business day with a clear next step.
Free consultation
24h response
Senior specialists