iOS, Android and cross-platform
Mobile app development that users keep.
Native iOS, native Android or one React Native codebase, chosen on evidence. Designed around the first session and tested on the phones your customers actually own.
30-min call with a senior lead · Reply within 1 business day · NDA on request
Apps in the stores
Best store rating
Passed review first time
Years of team experience
01The approach
Our approach to mobile app development.
Almost nobody deletes an app over a bug.
What changes on the phone
- New users reach something useful fast90s to value
- They come back on day thirty+41% retention
- A cold start that feels instant-1.9s cold start
- It keeps working in lifts and dead zonesOffline-first
- Store review passed first time, handled here100% pass rate
- The same senior engineers, start to finish0 swaps
Read the full approach
They delete it because the first session gave them nothing. Six permission prompts. Then a form asking for data the app has not earned.
So time to first value is a spec item. It carries a number we measure. Permissions are asked for when they earn themselves. Offline behaviour is designed, not discovered.
You also get a straight answer on platform. React Native or Flutter covers most business apps for around sixty percent of the effort. Native suits deep hardware access and heavy animation.
How we protect the first session
- Time to first value written into the spec
- Permissions requested when they earn themselves
- Offline behaviour designed, not discovered
- Tested on mid-range Android, not only flagships
- Store listings and review replies handled here
02Services
Two platforms, one codebase for both, or no store listing at all. The table compares them; the section below says which one we would pick.
Mobile app development services we offer.
| iOS app development Native Swift and SwiftUI for iPhone and iPad, with App Store review handled here rather than handed to you. | Android app development Kotlin and Jetpack Compose, tested on the mid-range phones your customers actually own rather than a flagship. | Hybrid and cross-platform apps One React Native or Flutter codebase for both stores, with native code written only where the hardware demands it. | Web apps and PWAs An installable progressive web app when a store listing is not worth the overhead. Works offline, updates the day you deploy, no review queue. | |
|---|---|---|---|---|
| Typical timeline | 12–16 weeks | 12–16 weeks | 10–14 weeks | 8–12 weeks |
| Best for | Hardware & polish | Reach & devices | Both stores at once | Skipping the stores |
| Timeline | 12–16 wks | 12–16 wks | 10–14 wks | 8–12 wks |
| Codebase | iOS only | Android only | One, both stores | One, any device |
| Store review | Handled here | Handled here | Handled here | None |
| Next stepQuoted per project after a free consultation. | Explore iOS app development | Explore Android app development | Explore hybrid app development | Explore web app development |
iOS app development
Native Swift and SwiftUI for iPhone and iPad, with App Store review handled here rather than handed to you.
- Timeline
- 12–16 weeks
- Best for
- Hardware & polish
- Timeline
- 12–16 wks
- Codebase
- iOS only
- Store review
- Handled here
Android app development
Kotlin and Jetpack Compose, tested on the mid-range phones your customers actually own rather than a flagship.
- Timeline
- 12–16 weeks
- Best for
- Reach & devices
- Timeline
- 12–16 wks
- Codebase
- Android only
- Store review
- Handled here
Hybrid and cross-platform apps
One React Native or Flutter codebase for both stores, with native code written only where the hardware demands it.
- Timeline
- 10–14 weeks
- Best for
- Both stores at once
- Timeline
- 10–14 wks
- Codebase
- One, both stores
- Store review
- Handled here
Web apps and PWAs
An installable progressive web app when a store listing is not worth the overhead. Works offline, updates the day you deploy, no review queue.
- Timeline
- 8–12 weeks
- Best for
- Skipping the stores
- Timeline
- 8–12 wks
- Codebase
- One, any device
- Store review
- None
03Included
What we deliver.
01Time to first value, specified
How fast a new user reaches something worth having. Written into the spec and measured.
02Offline behaviour designed up front
Queued writes, conflict handling and honest empty states. Built in, not patched on later.
03Device fragmentation taken seriously
Tested on mid-range Android and older iPhones. That is what most of your users hold.
04Store submission run by us
Developer accounts, listings, screenshots, privacy declarations and every reply to a reviewer.
05Push notifications with restraint
Frequency caps and real preference controls. A badge nobody asked for is the quickest route to deletion.
06Crash and performance monitoring
Sentry or Crashlytics with alerting set up. You hear about a crash loop before your users complain.
04The choice
iOS, Android or one codebase?
Most teams arrive having already decided, usually on the strength of what a competitor did.
The short version
- Hardware, sensors or heavy animation: build native
- Both stores, ordinary business logic: one codebase
- iOS first when revenue per user decides it
- Android first when reach decides it
- No listing needed: an installable web app
Read the full approach
The choice is narrower than it looks, and three questions settle it.
Does the app need the phone itself? Continuous background location, Bluetooth peripherals, ARKit, HealthKit, camera work beyond a photo picker, or animation that has to hold sixty frames. Any of those and you build native iOS or native Android. Without them you have a business app, and business apps do not need it.
Do both stores matter on day one? If they do, one React Native or Flutter codebase gets you there for roughly sixty per cent of the effort of building twice. Where the platforms genuinely need to diverge you write a native module, not a second app.
Does it need to be in a store at all? An installable web app skips the review queue and updates the day you deploy. For internal tools and low-frequency consumer products, a store listing is overhead nobody asked for.
If you only ship one platform first, revenue per user usually points at iOS and raw reach usually points at Android. We scope both routes in week one and hand you the comparison in writing, because the honest answer moves with the product rather than with the agency.
05Process
Our app development process.
Five stages, and you install builds on your own phone from week five.
01ShapeWeek 1–2
Scope cut, platform decided. Interviews, a competitive read and one hard prioritisation session. Native and cross-platform are both scoped, so the decision gets made on evidence instead of preference.
02DesignWeek 2–5
The first ninety seconds, designed. Core flows drawn against a time-to-first-value target, then prototyped. Tested on real people holding real phones.
03BuildWeek 5–12
Builds on your own phone. Two-week sprints delivering TestFlight and Play internal builds you install yourself. Analytics and crash reporting are wired as we go.
04SubmitFinal 2 weeks
Review passed first time. Listings, screenshots, privacy declarations and every reply to a reviewer, handled here. We read the guidelines during design, which is why we have not been rejected yet.
05RetainOngoing
Then we chase day thirty. Funnel and retention data reviewed against the targets set in week one. The v2 backlog is ordered by what users did, not by what anyone assumed.
Stage 02 · Design
06The work
Product and platform work, described honestly, the published examples live in the portfolio.
What we build.
Product work, end to end.
Interfaces, dashboards, and the systems behind them.
- Native and cross-platform apps
- SaaS dashboards and admin tools
- APIs, integrations and data pipelines
- MVPs scoped to a first release
Much of our product work sits under an NDA. Everything in the portfolio was built by the same engineers and is live right now, go and prod it.
07Why Syscodes
What teams say after comparing us with larger app agencies.
Why teams choose Syscodes.
to first value
We design the first session
Time to first value is a spec item with a number against it. Most uninstalls happen there.
routes compared
A straight answer on platform
Both routes are scoped in week one. Cross-platform suits most business apps. Animation-heavy ones need native.
first-submission pass
Store submission is our job
Accounts, listings, screenshots, privacy declarations and review replies. Passed first time, every time so far.
seniors, start to finish
Senior people, start to finish
Senior specialists only. Hire mobile app developers through us and the same person writes the code.
ownership
Your repository, your IP
Yours from commit one. IP assigned on payment, and no proprietary SDK holding your build hostage.
reply time
A reply inside one business day
Before the contract and during the build. We make no unpaid test builds.
08Clients
130+ brands across 20+ countries, from pre-seed founders to national operators.
Teams whose apps we ship.
“I would absolutely hire Syscodes again. Their Shopify expertise, clear communication, and reliability made the entire project seamless. They brought valuable ideas and recommendations that genuinely improved the final result. Professional, responsive, and highly skilled, I couldn’t recommend them more highly.”
conversion rate
“Great experience working with Syscodes on our CRO-focused website redesign. They understood our goals, improved the user flow, and delivered a better design. Communication was smooth, deadlines were met, and the whole process was very professional. Would definitely work with them again.”
sales
Not sure where to start?
Ask us anything before committing to a call. Most questions get a real answer within a few hours.
or WhatsApp +91 70034 16634
9.9/10 client score · 150+ projects · 100% on time
09Engagements
What a mobile app development project costs depends on its scope, not on a price list. Every engagement is scoped individually after a free consultation, and the proposal states exactly what is included.
What mobile app development costs, and what shapes it.
Engagement
App MVP
- One defined v1
- One store or both
- Submission handled
- Analytics wired pre-launch
Most chosen
Cross-platform app
- React Native or Flutter
- Both stores, one codebase
- Analytics & crash monitoring
- Store review handled
Engagement
Native build
- Swift or Kotlin
- Platform-specific interaction
- Hardware and sensor access
- Performance tuning per platform
10FAQ
Frequently asked questions.
Scope, timeline, platform choice and the store review.
Still unsure?
Ask us anything before committing to a call. Most questions get a real answer within a few hours.
hello@syscodes.in+91 70034 16634
Book a 30-min call
What is included in a mobile app development project?
Shaping, design, build, store submission and fourteen days of post-launch cover. Backend and infrastructure are usually thirty to forty percent of the work. Every mobile app development project is scoped and quoted after the consultation.
Should we build native or cross-platform?
For dashboards, bookings, content and commerce, one codebase covers both stores. React Native or Flutter does that job. That is roughly sixty percent of the effort of building twice. Go native for heavy animation or deep hardware access.
How long does iOS and Android app development take?
Six to ten weeks for an MVP. Ten to fourteen for a cross-platform build. Fourteen to twenty for native. Design and prototyping take the first two to four weeks.
Do you handle App Store and Play submission?
Completely. Developer accounts, listings, screenshots, privacy declarations and replies to reviewers. Our first-submission pass rate is one hundred percent so far. We read the guidelines during design.
Can you do the design as well as the build?
Yes, and the same people do both. Flows, prototype, design system and build come from one team. That is the point of using a mobile app design agency that also ships the code.
What affects the cost of app development in India?
Whether one codebase serves both platforms, how much of the app has to work offline, and how many systems it talks to. Payments, maps and push notifications each bring their own testing cycle. A second platform adds much less than the first if it was planned for from the start. We have set the ranges out in full in what mobile app development costs in India.
Where are you based, and can you work with us outside Kolkata?
Do you work with clients outside India?
Yes. We have delivered in 20+ countries across five continents, and we commit to four guaranteed overlap hours with US Eastern (18:30–22:30 IST), with a full overlap for the UK and Europe. The names are in the contract.
11Start a project
Let’s scope your app.
Tell us who the app is for and what it must do. Written proposal inside one business day.
- Within 1 business dayWe read it properly and reply with real questions, not a templated brochure.
- A 30-minute scoping callFree, no obligation. We tell you honestly if we are the wrong fit.
- A written proposalScope, timeline, deliverables and the success metric, all on one page.
You'll hear back from a senior lead, never a bot.