Hashlogics
Mobile app development company

Mobile apps that hold up where the signal drops

Hashlogics is a mobile app development company, headquartered in East Islip, New York with engineering in Lahore, that builds iOS and Android apps, ships them through App Store and Google Play review, and keeps them working after every OS update. We stay on each app for 2 months after launch, free.

  • 4.8 on Clutch across 22 reviews
  • PremiumAudit.io: audit cycle cut 75%, calculation errors cut 95%
  • In production for SmartREI, Tankaware, ZyloBase, KiwiWrite
The standard

Most mobile apps are tested on office wifi and used somewhere far worse. The people who need yours are standing next to a fuel tank, or starting a shift in a building with thick walls. So the questions that decide whether your app survives are boring ones. What happens to a half-finished form when the connection dies? Who gets paged when the store rejects a release? We answer those in week one, because retrofitting them later means rewriting the app.

The problem

The demo passes. The Tuesday shift does not

A mobile demo is a rehearsed run on good wifi. Real use is messier. A tech opens the app with one bar, fills in an inspection, and walks into a metal building. If nobody planned for that moment, the form is gone and the tech stops trusting the app by Thursday.

Nobody scopes the app stores either. Apple and Google both review releases, and both can reject one. A build with no owner after launch sits broken in the store while your team goes back to paper.

So we start with where your users actually stand, not with the screens.

What we have shipped

Counted, not estimated

40+

published case studies of systems we built

3

React Native field and staff apps among them: TankAware, Shift Link, ExtraaJe

5

permission tiers governing TankAware, from contractor to super admin

70%

less manual compliance checking at Shift Link

The work

What we actually build

Real apps, running for named clients. Not capability nouns.

Apps for people holding a clipboard

TankAware replaced paper inspection logs across every petroleum tank Sutherland Excavating runs in Canada. The mobile side is React Native; IoT tank sensors feed the same platform. The operator reported 40% fewer manual errors.

Apps that decide who may work

Shift Link onboards UK agency workers, checks their documents against the government Right to Work API, then offers shifts only to the people who pass. Web in Next.js, mobile in React Native, one Supabase backend.

Apps staff open because they want to

ExtraaJe reads shift data from Planwork, turns it into points, and lets European staff spend them in a React Native app. HR runs the campaigns from a web dashboard, in Dutch and English.

Native Swift and Kotlin, when the hardware demands it

React Native is our default because most business apps do not need two codebases. We go native when an app leans on the camera, background location or a platform feature React Native does not reach cleanly. We tell you which one you need before you pay for either.

iOS, Android or both

iOS, Android or both, native or cross-platform

Most business apps should ship on iOS and Android together, because your customers and staff carry both. We build them at the same time from one React Native codebase with Expo, and release through App Store Connect and Google Play Console under your own developer accounts. BrandLocator, the bilingual store discovery app we built with its admin portal, is live on both stores this way.

Native Swift for iOS or Kotlin for Android wins when the app leans hard on the device: heavy background work, low-level Bluetooth, or a camera pipeline that has to be as quick as the hardware allows. Our native vs React Native comparison sets out the trade-off, and we'll recommend one in the Blueprint rather than by habit.

Streaming and TV apps follow the same rule. Reveel, the creator-first streaming service for independent film we helped build, runs across web, mobile and connected TV, including Roku, Fire TV and Apple TV.

Enterprise mobile apps

Enterprise mobile application development: SSO, offline sync and roles

Enterprise mobile application development adds the parts a consumer app can skip. Single sign-on through your identity provider. Apps distributed through your device management. Offline sync that keeps the record honest when a worker has no signal. And role permissions, like the five tiers that govern TankAware from contractor to super admin.

Shift Link's React Native app checks a worker's right to work against the UK government's API before a shift can be offered, which cut manual compliance checking by 70%. TankAware's field app records tank inspections offline and syncs when the connection returns.

How a mobile build runsLive
  1. ScopeFree scoping call, then the Blueprint. Where do users stand?
  2. DecideReact Native or native. In writing.
  3. BuildOffline and sync first, screens after.
  4. ReleaseBoth stores. We handle review.
  5. RunCrash alerts, OS updates, store rules.

Most projects put Release last and treat it as a formality. Apple and Google both update their rules, and an app that ships once is not an app that stays installable.

The hardest part

What your app does with no connection

Offline is a data decision, not a feature toggle. Two people edit the same shift on two phones with no signal. When both reconnect, one of them is wrong, and your app has to know which.

We settle that before any screen gets designed. Which records live on the phone, and how long. What happens when two edits collide. What the user sees while work is queued. Get it wrong and the app looks fine while it quietly loses data.

  • Records the user needs offline are chosen deliberately, not cached by accident.
  • Queued work is visible, so nobody submits a form twice hoping it took.
  • Conflicts have a rule you agreed to, not whichever write landed last.
  • Photos and documents upload when signal returns, without blocking the app.
A close-up miniature handheld device with its antenna disconnected and a glowing blue acrylic storage cartridge still holding data, showing an app working with no connection.
The stack

What we build on

Mobile

  • React Native
  • Swift
  • Kotlin
  • Expo

Backend

  • Supabase
  • PostgreSQL
  • FastAPI
  • Node.js
  • Laravel

Run

  • AWS
  • Vercel
  • Sentry
  • CI/CD pipelines
  • App Store and Play Console

Shipped integrations

  • UK Right to Work API
  • Planwork
  • IoT tank sensors
  • SendGrid
  • Twilio
  • Stripe
A client, in their own words

“TankAware has revolutionized how we manage petroleum sites. The real-time data and automation have exceeded expectations.”

Blake Sutherland · President, Sutherland Excavating Ltd.

The usual mobile project against ours

Both put an app in the store. They part company in month three.

Where it is tested

The usual approach

Office wifi, on the newest phone in the room.

How we build

The conditions your users work in, including no signal at all.

Offline behaviour

The usual approach

Added later, once a user loses a form.

How we build

Decided in week one. Conflicts have a rule you agreed to.

Native or cross-platform

The usual approach

Whatever the shop already builds in.

How we build

We say which one your app needs, and why, before you commit.

Store releases

The usual approach

Your team discovers the review process on launch day.

How we build

We submit, handle rejections, and keep the app installable.

After the OS update

The usual approach

Reported by a customer whose app now crashes.

How we build

Crash reporting we watch, under an agreed service level.

Outsourcing your app build

Outsourcing your mobile app development and still owning it

When you outsource an app, ownership is the first thing to settle. With us, the App Store and Google Play developer accounts are yours, the signing keys are yours, and the code, data and backend accounts are yours in writing before work starts. If we part ways, your own team or another firm can carry on.

We are headquartered in East Islip, New York, with engineering in Lahore, and we overlap with your working day for calls, reviews and releases. If you'd rather add a developer to your own team, see mobile app developers for hire. For budgeting, how much it costs to build an app explains what moves the number.

Questions, answered
01What does a mobile app development company do?+

A mobile app development company designs the flows, builds the iOS and Android apps and their backend, ships them through App Store and Google Play review, and keeps them working after each OS update. Hashlogics does all of that with senior engineers, for enterprises and startups.

02Do you build iOS and Android apps at the same time?+

Yes. We usually ship both from one React Native codebase, as we did with BrandLocator. Where a feature needs the device at full depth, we write that part natively in Swift or Kotlin.

03Do you do enterprise mobile application development?+

Yes. Enterprise mobile apps get single sign-on, device-management distribution, offline sync and role permissions. Shift Link and TankAware are both React Native apps used by workers in the field, with compliance checks and five permission tiers respectively.

04Can we outsource our mobile app development to you and still own the code?+

Yes. The code, the backend accounts and the App Store and Google Play developer accounts are yours in writing before work starts. You can take the app in-house or to another firm at any point.

05Should my app be native or cross-platform?+

React Native fits most business apps, because one codebase serves both stores and the work does not double. TankAware, Shift Link and ExtraaJe all run on it. Go native in Swift or Kotlin when the app leans hard on the camera or background location. The same applies to any platform feature React Native reaches badly. We give you the answer in the scoping call, before you have spent anything.

06Will the app work with no internet connection?+

Yes, when we design for it from the start, which is the only time it is affordable. That means picking which records live on the phone and showing the user what is queued. It also means agreeing a rule for two people editing the same record offline. Bolting offline support onto a finished app usually means rebuilding the data layer.

07Who owns the App Store and Google Play developer accounts?+

You do: we publish under your own developer accounts, so the listings and the signing keys stay yours. Both stores review submissions and both reject builds for reasons that change over time. Handling that is part of the engagement rather than a surprise your team meets on launch day.

08What happens to the app after an iOS or Android update?+

Your app gets tested against it and updated, under an agreed service level or by your own team after a documented handover. You pick which at the start. The first 2 months of support and maintenance are free, with every build. An unmaintained app does not fail on release day. It fails quietly, one OS version later, and your users just stop opening it.

09Can you take over a mobile app another team built?+

Yes: we build new systems and rescue ones another team built, and a mobile app is no exception. We read the codebase, run the app in the conditions it is actually used in, and report what is fixable against what should be replaced. That work is the fixed-fee Blueprint, credited in full against the build, and if the plan isn't one you'd act on, you don't pay for it.

10Does the app need its own backend, or can it use what we already run?+

It can use what you already run, through your existing APIs, which is usually cheaper than any migration. Shift Link's app calls the same Supabase backend the web platform uses, plus the UK government's Right to Work API. We only propose a new backend when the old one cannot serve a phone safely.

11How much does mobile app development cost?+

Cost is driven by the number of platforms, how much of the app must work offline, and how many systems it has to talk to. Quoting a range before seeing the workflow is guessing, and the guess is always wrong in the same direction. The scoping call is free, and the fixed-fee Blueprint, credited in full against the build, gives you one fixed price before the build starts.

12We are a startup with no mobile team. Is this only for enterprises?+

Both, and the shape differs. A startup usually wants one workflow in users' hands and evidence it holds up, so we ship narrow and instrument it. An enterprise wants role-based access, audit trails and integration with systems already running, which is what TankAware needed across five permission tiers. The offline and release discipline is identical.

By , CEO, HashlogicsUpdated
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What happens next

  1. 01

    You send a brief or book a call

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  2. 02

    A senior engineer replies within 24 hours

    Not a sales rep.

  3. 03

    Honest scoping, in writing

    And if we’re not the right fit, we say so.

Abdul Basit, CEO of Hashlogics

“I started Hashlogics because too many teams ship a demo, get paid, and disappear. We build to a standard we’d run ourselves — and we stay to keep it running.”

Abdul Basit · CEO · a direct line

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