Dani Keo
Project Manager, Sociall
Entalogics built our iOS Chromium-based mobile app with a smooth native feel, stable media rendering, and reliable sync. We shipped faster and improved engagement after launch.
Mobile app development for iOS and Android.
We build mobile apps for iOS and Android — consumer apps, B2B tools, marketplaces, and AI-powered features — engineered to clear App Store and Play Store review, not just run on your test device.
5.0
Based on 100+ Reviews
TOP RATED PLUS
100+ Reviews
Trusted for custom mobile app development across startups, healthcare, and consumer products.
Why Entalogics for mobile
Four things every mobile app actually needs.
App Store rejections, dead push notifications, and an app that stops working the moment wifi drops — we've inherited enough half-built mobile apps to know these four gaps show up almost every time. Here's how we close them before a single screen gets built.
Store-ready01
Clear the App Store and Play Store, first try.
Apple and Google reject apps for the same handful of avoidable reasons: missing privacy details, unclear metadata, a permission nobody explained. We build to their current guidelines from the start, so review isn't where your launch date slips.
Cross-platform02
Cross-platform without compromise.
One Flutter or React Native codebase for both iOS and Android, built so it still feels like a native app. Proper navigation, gestures, and scrolling, rather than a website inside a frame.
Offline03
Offline-first and fault tolerant.
People lose signal. Your app keeps working, syncs when the connection comes back, and doesn't lose anyone's data because a train went into a tunnel.
Push04
Push notifications, all yours.
No third-party notification vendor sitting between you and your users. We wire it up on your own infrastructure.
SHIPPED, ON THE RECORD
What founders say
on the record.
Verified feedback from Upwork, Clutch, and reference calls we're happy to set up before you sign anything.
Sherzod Khabibullayev
Project Manager, Digital Office: Aura
Entalogics built Digital Office: Aura as a custom Chromium-based authentication platform. Their team modified Chromium internals and integrated our manual custom authentication flow with reliable implementation, fast delivery, and consistent communication.
Ilya Khodakovsky
Project Manager, Omni Browser
Entalogics built our Omni Browser on top of Chromium with deep product-level execution. They implemented an integrated VPN and Omni Crypto Wallet directly in the browser, made strong architectural decisions, and delivered quality code on schedule with clear communication.
Giles Whitman
CTO, SentryBay
Their Chromium expertise helped us ship a hardened browser with live threat controls and enterprise rollout support. Security operations became significantly faster.
SELECTED WORK
Real products,
real ARR
Mobile work first, then other products we've shipped. What got built, and what it did for the people using it.
All case studies
Hard-won lessons
What makes a mobile app
project fail.
Bad code is rarely the reason a mobile app project fails. These six are.
01
No privacy manifest or store metadata prepped early
The submission bounces on paperwork rather than code, and every rejection costs another review cycle, sometimes weeks.
02
Crash monitoring bolted on after launch
Bug reports arrive as a screenshot and a guess, with no stack trace, so every fix starts from nothing.
03
A hybrid webview passed off as native
Scrolling stutters and gestures lag half a beat. Store reviewers notice the cheap feel before your users complain about it.
04
Notifications treated as a feature, not a system
Adding proper retention logic later means reworking data flow that should have been designed in from the start.
05
QA done on one phone, one OS build
Runs fine on the founder's iPhone. Breaks the moment a real user opens it on an older Android.
06
Built assuming a constant connection
Every screen waits on a network call, so the app becomes unusable the second someone loses signal.
✓
Every one of these gets caught in discovery, before a build starts — not after your app collects its first rejection email from Apple.
Know what you're building
Mobile app or web app?
Know what you're building.
They can look identical on screen. The engineering, distribution, and maintenance underneath are nothing alike.
Mobile app
Web app
Runs on
iOS & Android natively
Browser
Distribution
App Store & Play Store
URL
Updates
Staged rollout, review required
Instant, server-side
Offline support
Full
Limited
Device APIs
Camera, GPS, biometrics, push
Restricted, browser-permission based
Code signing
Required — Apple & Google
Not applicable
Need offline access, camera, GPS, or push notifications? That's a job for native or cross-platform mobile app development, not a responsive website with an app icon glued on.
What we build
Six mobile app types,
one engineering bench.
Here's the mobile app development work we get asked for most, from consumer apps to enterprise mobile builds.
#
Type
What it is
Tools
01
Consumer & lifestyle apps
Social, fitness, and content apps built to hold up under daily, unpredictable real-world usage
FLUTTERREACT NATIVESWIFT
02
B2B & productivity mobile
Internal tools built for a workforce, not the App Store charts
REACT NATIVEKOTLIN
03
Marketplace & on-demand
Two-sided apps with real-time matching, payments, and location tracking
NATIVEBACKEND INTEGRATION
04
Health & regulated mobile
HIPAA-ready mobile apps for healthcare and other regulated industries
NATIVEENCRYPTED STORAGE
05
Companion & second-screen apps
Mobile apps that extend an existing product instead of standing alone
CROSS-PLATFORMSDK INTEGRATION
06
Cross-platform-first apps
One codebase, shipped to iOS and Android without a compromised experience
FLUTTERREACT NATIVE
Store submission
App Store and Play Store.
We handle the submission.
A rejection at review can cost you two more weeks you didn't budget for. We build toward submission the whole way through, not the week before launch.
iOS
App Store
- ✓App Store Connect setup and metadata
- ✓TestFlight configured for real beta feedback, not just an internal build
- ✓Apple Developer Program compliance checked against current guidelines
- ✓Common rejection triggers fixed before submission, not after
Android
Play Store
- ✓Google Play Console setup and app signing
- ✓Play policy compliance checked against Google's current rules
- ✓Staged rollout so problems surface before every user sees them
- ✓App signing and release management handled end to end
ASO
App Store Optimisation.
Built in, not bolted on.
ASO decisions get harder to fix the later you make them. We make them early.
✓Keyword research and title/subtitle work done before launch, not after downloads stall
✓Screenshots and preview video built to turn store visits into installs
✓Conversion tracked from listing view to first open, not just total downloads
✓Rating prompts timed around real usage, not a random popup on day one
✓Category and competitor placement reviewed before you commit to one
✓Localization planned upfront for the markets the app is built to reach
Infrastructure
Mobile infrastructure.
Configured from day one.
The backend pieces a mobile app depends on, set up before the first screen ships.
01
Push notifications
Firebase Cloud Messaging or Apple's APNs, running on your own infrastructure rather than through a vendor you're locked into.
02
Deep linking
Universal Links and App Links, so a marketing link opens the exact screen someone expects instead of dropping them on the home screen.
03
Offline-first sync
Local storage with background sync. The app keeps working on a plane and catches up as soon as it's back online.
04
Biometric authentication
Face ID and fingerprint login built with the platform APIs, rather than routed through a slower third-party wrapper.
05
In-app purchases
Apple and Google purchase APIs, subscriptions, and receipt validation, set up properly the first time.
06
Mobile analytics
Event tracking and funnels live from launch, so you aren't guessing at retention three months in.
Engagement shape
From spec to live on the
App Store in four phases.
ASO and store submission get built alongside the app, not crammed in during the final week.
Phase 1
Discovery & scope
The platform decision (native, Flutter, or React Native), the feature scope, and the backend architecture, all settled before any code is written.
Phase 2
Design & build
UI/UX design and the core build, tested throughout on real devices and OS versions as well as the simulator.
Phase 3
ASO & submission
Store listings, screenshots, keyword work, and the submissions to both stores, all done before launch day.
Phase 4
Launch & grow
Crash monitoring, analytics review, and feature work based on how people use the app once it's out.
Stack
Mobile app stack.
Battle-tested.
Picked by platform and product need, not a default we reach for every time.
Platform
Native iOS (Swift), Native Android (Kotlin), Flutter, React Native
Native Android
Kotlin, Jetpack Compose
Backend & APIs
Node.js, REST & GraphQL, Firebase
Push & messaging
Firebase Cloud Messaging, APNs
Analytics & monitoring
Mixpanel, Sentry, Firebase Analytics
Engagement
Three ways to
work with us.
Three lanes, depending on where you're starting from.
MOBILE APP BUILDMVP build
Your app live on the App Store in 10–14 weeks.
For teams shipping their first mobile app
A submitted, live app on both stores. Scoped once, quoted once, and built by the people you talk to on the call.
- Native or cross-platform, chosen on the discovery call
- App Store and Play Store submission handled end to end
- Direct calls with the person building it
ONGOING RELEASES & MAINTENANCERetainer
We own your release cadence.
For teams with a live app that has to stay current
Ongoing releases and OS-update maintenance on a retainer. We handle store listings, OS compatibility, crash triage, and staged rollouts, so the app keeps working every time Apple and Google ship an update.
- Cross-device testing and OS compatibility kept current on a schedule
- App Store and Play Store listings kept current
- Crash monitoring triaged, fixes shipped through staged rollout
- Pause or cancel with 30 days notice
ENTERPRISE MOBILECustom
Compliance-grade mobile applications.
For regulated industries: healthcare, finance, enterprise
For HIPAA-compliant healthcare apps, financial apps, and enterprise rollouts, where the architecture has to be right the first time and procurement has questions before anyone signs.
- Encrypted local storage and secure API design
- Biometric authentication and role-based access control
- Procurement and legal handled on our end
Want the engineers on your own team instead of a delivered project? Hire cross-platform app developers
Related work
You might
also need.
A deeper look at the native-vs-cross-platform decision, plus real shipped work.
Native means two apps, Swift for iOS and Kotlin for Android. You get the deepest access to each platform and the highest cost, because you're maintaining both. Cross-platform means one Flutter or React Native codebase for both stores. It's faster and cheaper, with some limits around deep hardware access. Most business apps do fine cross-platform. Apps built around the camera, Bluetooth, or AR usually need native. We settle it on the discovery call once we've seen your feature list.
A focused first version usually lands on both stores in 10–14 weeks. Heavier backend work or regulated data pushes that out. You get a fixed number after discovery, once we've seen the feature list.
Yes. Store listings, metadata, screenshots, and the submissions themselves are part of the build. There's no separate line item for it.
We build against Apple's current guidelines from the start, so most rejection reasons never come up. If a build is rejected anyway, we fix it and resubmit ourselves. Most rejections are metadata or privacy-disclosure issues and turn around in a few days.
Yes. A chat assistant, recommendations, or an LLM-backed feature can be added to an app you already have without rebuilding it. The main question is where the model runs: on the phone, on your servers, or with a model provider. Privacy and cost usually decide that.
Yes. We start by reading the codebase: the architecture, the dependencies, the crash reports, and where it stands with the stores. Then we keep building on it. A full rebuild only comes up if the foundation can't carry what you want next, and we'll tell you that before quoting either way.
Senior engineers
Ship your mobile appthis quarter.
A free 30-minute call with a senior mobile app developer gets you a platform recommendation, a submission plan, and a timeline you can plan around.