Mobile apps people keep on the first screen.
A phone is an unreliable computer on an unreliable network. Apps that respect that feel fast; apps that do not feel broken.
JANNEX builds mobile applications for iOS and Android, cross-platform or native depending on the requirement. Work covers interface design, offline-first data synchronisation, push notifications, device integrations, store submission and release engineering.
The things that decide whether an app survives
Rarely the feature list. Usually what happens in a lift, on a train, or on the second-cheapest Android phone in the market.
- A blank screen with no signal instead of the last known state
- Sync conflicts resolved by whoever saved last
- Battery and data consumption nobody measured
- A release process that takes a week and a spreadsheet
- Permissions requested up front, before the user knows why
How we build mobile
Offline is the default assumption, not a later feature.
Local first
A local store is the source of truth for the interface. The network updates it; it does not gate it.
Explicit conflict rules
How two edits reconcile is a product decision, decided in design and written down.
Measure the device
Cold start, frame timing, battery and data measured on mid-range hardware, not flagships.
Release as a pipeline
Signed builds, staged rollout, crash reporting and remote configuration from day one.
What this covers
Build
- Cross-platform applications
- Native modules where required
- Offline-first architecture
- Background sync
- Deep linking
Device
- Camera, scanning and OCR
- Location and geofencing
- Biometric authentication
- Push notifications
- File and document handling
Release
- App Store and Play submission
- Staged rollout
- Crash and performance monitoring
- Remote configuration
- Over-the-air updates where permitted
Technology
The working set for this capability. Choices are made per engagement, against your constraints and your team's skills.
Where it is typically applied
Patterns we see repeatedly, described generically. Your version will differ in the details, and the details are the work.
Field operations app
Works offline, captures evidence, syncs when a connection returns, and never loses an entry made in a basement.
Customer app for an existing platform
The same accounts, permissions and data as the web product, through an interface designed for one thumb.
Approval and workflow app
Notifications that arrive when a decision is needed, and a decision that takes two taps.
How the engagement runs
The same seven stages, scoped to the size of the problem.
Understand
We start with the constraint, not the feature list. What breaks today, who it affects, what it costs.
Define
A written scope with the trade-offs made explicit — what is in, what is deferred, what we will measure.
Design
Interfaces, data models and system boundaries designed together, because they constrain each other.
Build
Short cycles against a working environment. Reviewed code, tests where they earn their keep.
Launch
Staged rollout with monitoring in place before traffic, not after the first incident.
Learn
Instrumented usage read against the thing we said we would measure at Define.
Scale
Performance, cost and operations tuned once real load has told us where the pressure is.
Questions we are asked
Cross-platform or native?
Cross-platform for most business applications — one codebase, two stores, substantially lower total cost. Native where the product depends on sustained graphics, deep OS integration or hardware behaviour that the bridge would compromise.
Can it work without a connection?
That is how we build by default: a local store, a sync engine and explicit conflict rules. Whether the app is usable offline is a product decision, not a technical limit.
Do you handle store submission?
Yes — accounts, signing, metadata, review responses and staged rollout. The release pipeline is set up as part of the build, not improvised at launch.
Have something worth building?
Tell us the constraint you are working against. If we are not the right people for it, we will say so.
Or write to connect@jannex.in