Can an app be built in a month?

A small one can, if the scope is one core feature, the design is simple and store accounts are already set up. Most business apps with accounts, payments and an admin panel need 8 to 16 weeks to be built and tested properly.

How long does App Store approval take?

Apple says 90% of submissions are reviewed in under 24 hours. Google says reviews for some accounts can take up to seven days or longer. Plan for at least one rejection and resubmission on a first release.

Is building for iOS and Android at the same time slower?

Only slightly with a cross-platform framework like Flutter or React Native, since one codebase serves both. Most of the extra time goes into testing on both platforms and preparing two store listings.

How long does it take to update an app after launch?

Small fixes can ship within days, depending on store review. Larger features follow the same design, build and test cycle as the original app, scaled to the size of the change.

How long does it take to build an app?

Most mobile apps take 8 to 16 weeks to build, from kickoff to launch. Simple apps sit at the short end; apps with payments, several user types or real-time features take longer. Add a week or two for app store review and, on new Google Play personal accounts, a 14-day closed test.

Oct 12, 2026·5 min read

How long each type of app takes

Most apps we build for clients in Malaysia and India take 8 to 16 weeks. As a rough guide for one cross-platform app on iOS and Android:

A simple app or MVP (a handful of screens, login, one core task): around 8 weeks.
A mid-sized app (accounts, payments, notifications, an admin panel): 10 to 16 weeks.
A complex or regulated app (marketplaces, live tracking, health or finance data): beyond 16 weeks, planned and delivered in milestones.

The build itself is rarely what stretches a timeline. Decisions, third-party approvals and store rules are, and you can plan for all three.

What happens in each phase

Our projects run through four phases: discovery, design, development and launch. Nothing moves forward until the previous phase is signed off.

Here's how a 12-week mid-sized app can break down:

Weeks 1 and 2, discovery: the user types, the core flows, what's in version one and what waits, and which services the app depends on.
Weeks 3 and 4, design: every screen and state designed and clickable, so you test the app's logic before any code exists.
Weeks 5 to 10, development: app and backend built in two-week milestones, each ending with a build you can install on your own phone.
Weeks 11 and 12, testing and launch: testing on real devices, fixes, store listings, submission and release.

Design changes in weeks 3 and 4 cost hours. The same changes in week 9 cost days, which is why the design sign-off matters more than any other.

How long app store review takes

Store review is short most of the time, but it isn't instant and it isn't guaranteed.

Apple says that on average 90% of submissions are reviewed in less than 24 hours. Google says that for certain developer accounts it takes more time, and review can take up to seven days or longer in exceptional cases.

The bigger delay catches first-time founders. Google Play personal developer accounts created after 13 November 2023 must run a closed test with at least 12 testers for 14 days before the app can go public. Register the Play account under your company, or start that test early, so two weeks don't appear at the end of your schedule.

Rejections add more. A rejected build needs a fix and a resubmission, so plan for at least one round on a first release.

Store rules in 2026 that add work

Some App Store and Play Store requirements change what has to be built as well as how it's submitted. Knowing them up front keeps them out of the final week.

Account deletion. Apple's App Review Guideline 5.1.1(v) says an app that supports account creation must offer account deletion within the app. That means a screen, a backend flow and careful handling of the user's data.
An equivalent login option. Under guideline 4.8, an app that uses Google or Facebook sign-in for its main account must also offer a privacy-focused alternative login, with some exceptions such as apps that only use the company's own accounts.
Current tools. Since 28 April 2026, Apple requires apps to be built with Xcode 26 or later using the iOS 26 SDK.
Current Android target. From 31 August 2026, new apps and updates on Google Play must target Android 16 (API level 36) or higher, with an extension available to 1 November 2026.

These are easy to leave out of a quote. Ask whether account deletion, store submission and the current SDK requirements are included.

What slows an app project down

When an app runs late, it's usually one of these, roughly in order of how often:

Scope that keeps growing. Every "small" addition needs design, backend work and testing on two platforms.
Waiting on other systems. An existing API without documentation, or a partner who's slow to share access, stalls the backend.
Payment gateway approval. Gateways in both countries need business documents before they let you take live payments. Our payment gateway fees comparison covers the options; apply in the first week.
Content and assets. Store screenshots, descriptions, privacy policy text and in-app copy all need someone to write and approve them.
Holidays. Approvals slow around Hari Raya and Chinese New Year in Malaysia, and around Diwali in India, on your side and on suppliers'.

Testing on the phones your customers use

Testing takes longer when your users' phones vary widely. In India, Android ran 92.8% of mobile devices in August 2026 according to StatCounter, across a long tail of budget and mid-range models. In Malaysia, iPhones are close to half the market.

So an app for Indian users needs time on low-cost Android phones, and a Malaysian app needs equal attention on both platforms. Our Flutter vs React Native comparison covers how the framework choice affects this.

After launch: the deadlines that come back every year

Launch isn't the end of the schedule. Both stores raise their technical requirements on a yearly rhythm, and an app that isn't updated eventually can't ship fixes.

Google's current rule, new apps and updates targeting Android 16 from 31 August 2026, is the latest of these target requirements, and the level keeps rising. Apple's requirement to build with Xcode 26 took effect on 28 April 2026. Each change means updating the project, retesting and resubmitting.

Plan two maintenance windows a year: one before Google's August deadline and one after Apple's major iOS release in September. Budget for them alongside hosting and support, as our app development cost guide suggests.

How to launch sooner

The fastest apps are the ones that launch with less. These steps save the most time:

Cut version one to one user type and one job. Everything else goes on a list for version two.
Build cross-platform with Flutter or React Native unless you need deep hardware access.
Open the store accounts in week one, under your company, so verification and Google's testing rules don't land at the end.
Use hosted services for login, payments and notifications rather than building them.
Make one person the decision-maker who can approve designs and builds within two days.

Timelines and budgets move together; our app development cost guide shows what each size of app costs in RM and ₹. If you'd like a realistic schedule for your idea, see our mobile app development work or send us the brief.

Frequently asked questions

Can an app be built in a month?: A small one can, if the scope is one core feature, the design is simple and store accounts are already set up. Most business apps with accounts, payments and an admin panel need 8 to 16 weeks to be built and tested properly.
How long does App Store approval take?: Apple says 90% of submissions are reviewed in under 24 hours. Google says reviews for some accounts can take up to seven days or longer. Plan for at least one rejection and resubmission on a first release.
Is building for iOS and Android at the same time slower?: Only slightly with a cross-platform framework like Flutter or React Native, since one codebase serves both. Most of the extra time goes into testing on both platforms and preparing two store listings.
How long does it take to update an app after launch?: Small fixes can ship within days, depending on store review. Larger features follow the same design, build and test cycle as the original app, scaled to the size of the change.