SERVICE
Mobile App Development by a Senior Team
We build iOS and Android apps — native or React Native, chosen on the merits — plus the backend and platform work that decides whether the app survives launch.
Most mobile apps don't fail in the App Store — they fail in month six, when the team that built them is gone and nobody can extend the code. Eltherion is a mobile app development company built for the opposite outcome: senior engineers handle iOS and Android app development end to end — native Swift and Kotlin or React Native, chosen on the merits of your product rather than the shop's staffing — along with the backend, APIs, and infrastructure most app shops can't build. One accountable team from first architecture decision to App Store release, writing code your own engineers can maintain.
Should you build native iOS and Android or React Native?
We choose the stack on the merits of your product, not the composition of our bench. As a React Native development company we ship a single codebase to both stores when that is the right call — for most startup products, it is — and we go native Swift and Kotlin when the product demands it: heavy rendering, deep hardware integration, background processing, or platform-specific UX the business is betting on. Either way we name the tradeoff up front — what you gain in speed and cost, what you give up in platform control — so the decision is yours and it is informed.
What do you get from a senior team that an app mill can't deliver?
App mills quote low by staffing junior developers against a spec and optimizing for the handoff, which is why so many apps ship once and then rot. Every Eltherion build is done by senior engineers under one accountable team — the people you talk to are the people writing the code. We build to be maintained: typed interfaces, tested critical paths, documented decisions, and an architecture your own engineers can extend after we hand over.
Who builds the backend your app depends on?
A mobile app is a client of a system — auth, user data, sync, push notifications, payments, and the APIs behind every screen. Most app shops stop at the screen and leave you to source the platform work elsewhere; we build both sides, so the data model, APIs, and app behavior stay coherent instead of splitting across vendors. That is the difference between an app that demos and a product that operates: offline behavior that reconciles cleanly, push that arrives, and a backend that scales past the launch spike.
What does App Store-ready actually mean?
It means the app clears review the first time and survives contact with real users: crash reporting and monitoring wired in before launch, a release pipeline through TestFlight and staged Play Store rollouts, and signing, store listings, and privacy disclosures handled as engineering work rather than an afterthought. We favor phased releases over big-bang launches so problems surface at 5% of traffic, not 100%. After launch you have a versioned, observable app your team can ship updates to every week.
What we deliver
- Native iOS (Swift) and Android (Kotlin) development
- React Native and cross-platform builds
- Backend, APIs, and cloud infrastructure behind the app
- Offline sync, push notifications, and payments
- App Store and Play Store release engineering
- Post-launch monitoring, crash reporting, and maintenance
Common questions
- What does it cost to build a mobile app?
- Cost is driven by the number of platforms (iOS, Android, or both), backend complexity, integrations like payments and push, offline and sync requirements, and design depth. Stack choice matters: React Native can cut the build meaningfully when one codebase serves both stores, which is why we make that call explicitly before scoping. We price a defined scope up front rather than billing open-ended hours.
- How long does mobile app development take?
- A focused first release typically ships in three to five months, with TestFlight builds in your hands well before that. Timeline scales with backend scope, integration count, and review cycles on each store. We ship in working increments you can evaluate along the way, not a single reveal at the end.
- What makes Eltherion different from other mobile app development companies?
- Senior engineers do the work — no junior bench behind a senior salesperson. One team builds the app and the backend it depends on, chooses native or React Native on the merits, and writes code your own engineers can maintain. Production is the standard: monitored, crash-instrumented, and ready to ship updates from week one.
- Do you handle app development for startups?
- Yes — app development for startups is core to the practice. We scope a first release deliberately so you fund the product decisions that matter, and we architect so the codebase survives what comes next: more users, more engineers, and a roadmap that changes after real feedback. You get an app built to raise on and build on, not a prototype you have to replace.