Users vanish within days
The average app loses about three-quarters of its daily users within three days of install.
Source: Business of Apps retention benchmarks
iOS and Android apps — designed, built and launched by one senior team. One codebase for both stores where it makes sense, smooth on every phone, and supported long after launch day.
Trusted by growing businesses across 9+ industries
The ProblemMost apps are deleted within days — not because the idea was wrong, but because the app was slow, buggy or never looked after. If any of these sound familiar, your app is working against you.
The average app loses about three-quarters of its daily users within three days of install.
Source: Business of Apps retention benchmarksMore than half of people have uninstalled an app because it crashed, froze or kept showing errors.
Source: Dimensional Research mobile user surveySeparate iPhone and Android builds double the cost of everything — every feature, every fix, every update.
Rejected for crashes, placeholder content or privacy labels — and launch day slips while you wait for answers.
A new iOS or Android version breaks something, your developer has moved on, and the one-star reviews start rolling in.
Get a free review of your app or idea — what will make users stay, and what to build first.
Get a free app reviewSee It In ActionFrom the first "I have an app idea" to something people use every day — see how Corammers takes it off your plate. Then hear it straight from our clients.
Hear it from our clients
What We BuildFrom a first version that proves the idea to an app thousands rely on every day — we recommend the approach that fits your users and budget, then design, build and launch it.
One shared codebase that ships to both stores — feels native on each phone, and every update lands everywhere at once.
Best forMost businesses that want iPhone and Android on one budget
Built separately in Swift and Kotlin when your app needs every last bit of performance or the newest platform features.
Best forCamera, AR, heavy graphics or deep device features
The few features that prove your idea, built properly so you can show investors, learn from users and keep building on it.
Best forFounders who need real users on a real app — fast
Ordering, rewards and push notifications that bring customers back — your brand on their home screen.
Best forRetail, restaurants, salons and service brands
Real-time availability, maps, live tracking and in-app payments — the whole job from request to receipt.
Best forServices, deliveries, rentals and appointments
Checklists, forms, photos and job updates that work offline and sync straight back to your systems.
Best forTeams that work away from a desk
Native or cross-platform? We'll give you an honest answer on a free call — based on your features, your users and your budget, not on what we like building.
Help me decideOur ProcessNo black box. You hold a working build in your hand every week, so you always know exactly where the app is.
We learn your idea, your users and the features that matter most — then send a fixed quote and timeline.
Scope, fixed price & timelineUser flows, a feature list split into "launch" and "later", and the right tech — cross-platform or native.
Feature map & user flowsEvery screen designed for iPhone and Android, with a clickable prototype you can try on your own phone.
Approved designs & prototypeTwo-week sprints with a fresh test build on your phone every week through TestFlight and Google Play testing.
Weekly test buildsReal-device testing, crash reporting, store listings and screenshots — then we take it through Apple and Google review.
Live in both storesOS updates, fixes and improvements guided by real usage data, plus new features whenever you are ready.
Support plan & roadmapTypical timelines: MVPs 6–10 weeks · full apps 3–6 months · complex platforms 6+ months
Built In, Not Bolted OnNo upsells for the basics. Every app we ship is checked against the same list before it reaches a single user.
Fast start-up and fluid scrolling, tested on older and budget phones as well as the latest models.
Every release checked on real iPhones and Android phones of different sizes — not just simulators.
Crash and error tracking from day one, so problems are fixed before they turn into one-star reviews.
Screens, sign-up funnels and retention tracked, so every update is guided by what users really do.
Encrypted data, secure sign-in and privacy labels done properly, so your users' data stays safe.
Listings, screenshots, privacy details and the review process for the App Store and Google Play.
Notifications people actually want and links that open the right screen — set up to bring users back.
Source code, developer accounts, store listings and user data in your name. No lock-in, ever.
Our WorkA few recent apps across very different industries — each one shaped around how its users spend their day.
Why CorammersGreat apps are built, tested and looked after by the same team. Here's how working with us compares with the usual options.
Corammers
Yes YesSometimes SometimesRarely Rarely
Client Reviews“Mobile app is super smooth, no lag at all — just a great user experience. You can tell they care about the small details. Highly recommend.”
“The app looks so good. Honestly didn't think it would be this nice, but the design is just fire — and it's super easy to use too. Thanks, guys!”
Lucas BernhardResearcher, SpaceBound
“Needed a system that actually scales, and these guys delivered. Everything works perfectly and the quality is top notch.”
QuestionsThe things founders and business owners ask us most before starting an app.
Ask us on a free callFor most business apps, cross-platform (Flutter or React Native) is the smart choice: one codebase, both stores, a lower budget and updates that land everywhere at once. Native makes sense when you rely heavily on the camera, AR, complex graphics or the very latest device features. We'll recommend one on the call and explain why.
It depends on the features, the platforms and whether you need a backend and admin panel. After a free discovery call we send a fixed quote with everything itemised — and we'll suggest a smaller first version if that gets you to market faster.
A focused MVP usually takes 6–10 weeks, a full-featured app 3–6 months, and complex platforms longer. You get a week-by-week plan before we start and a test build on your phone every week.
Yes. We prepare the store listings, screenshots and privacy details, submit the app to Apple and Google, and deal with any review feedback until it's approved.
Most apps do — for accounts, data, payments or managing content. We build the backend, APIs and an easy admin panel alongside the app, so everything works together from day one.
Yes. We audit the code, fix what's urgent, update it for the latest iOS and Android versions and then keep improving it. We'll only suggest a rebuild if it genuinely saves you money.
You do. The source code, the Apple and Google developer accounts, the store listings and your users' data are all yours. If you ever move on, you take everything with you.
Every week you get a new test build on your own phone through TestFlight or Google Play testing, plus a short update on what's done and what's next.
We keep the app healthy through new iOS and Android releases, fix issues fast and improve it based on real usage — on a flexible support plan or whenever you need us.
Yes. We set up app store optimisation and analytics from launch, and our marketing team can run social, content and paid campaigns to grow your downloads.
Let's TalkBook a free 30-minute app strategy call. You'll leave with clear next steps — whether or not you work with us.
Prefer email? Write to info@corammers.com.