Mobile app customisation
Changes and new features added to an existing iOS or Android app, including apps built from templates.
GradaxEuropean companyOrder outright
Founded 2014·Built and operated in Europe·3 days to 5 weeks
About this service
You have an app, perhaps built by a previous developer or bought as a template, and it needs changes: rebranding, new screens, a payment method, a fix to how something works. We review the code first, tell you honestly what state it is in, make the changes and get the update through store review.
Inheriting an app you did not build
Many businesses come to us with an app built by a developer who has moved on, or bought as a template from a marketplace. The code may be tidy or a tangle. Libraries may be years out of date. The build may only work on the previous developer's laptop. Nobody knows until someone looks.
That is why every job starts with a code review. We check whether the app builds, how old its dependencies are, how the code is organised and whether there are obvious security problems. You get a plain summary before we quote the changes. Occasionally the honest answer is that changing the app will cost more than rebuilding it, and you should know that before spending money.
Store requirements move, even when your app does not
Apple and Google raise their minimum requirements regularly: new SDK versions, new privacy declarations, new rules about account deletion or tracking permissions. An app that has not been touched for a year or two may be blocked from updating until it catches up, even if the change you want is a single word.
We check these requirements as part of the review and include the necessary updates in the quote. After making changes, we test both the new features and the old ones, because updated libraries sometimes break things that used to work. Then we take the update through both stores' review.
What you get
Everything below is in the price. Nothing here is an upgrade.
- Code review summary
- Changes or new features built
- Test builds for approval
- Store submission of the update
- Updated source code in your repository
What changes
- An honest assessment of the code before work starts
- Requested changes built and tested on real devices
- Updated libraries where old ones block store approval
- The update submitted and approved on the App Store and Google Play
How it runs
Review
Code, libraries and build process checked before quoting changes.
Build
Changes made in a branch, with test builds on your phone.
Test
Checked on iOS and Android devices, including old features.
Release
Update submitted to both stores and followed through review.
Compare the sizes
The standard price for each size. Extras are priced beside it, not hidden behind a call.
| Included | Rebrand or small changes€2903 to 5 working days | New feature€5001 to 3 weeks | Feature block and update€1,0503 to 5 weeks |
|---|---|---|---|
| Code review | Included | Included | Included |
| Rebrand: icon, splash screen, colours, names | Included | Included | Included |
| Up to three small changes | Included | Included | Included |
| Store submission | Included | Included | Included |
| One new feature or screen set | Not included | Included | Included |
| Library updates needed for the change | Not included | Included | Included |
| Regression testing of existing features | Not included | Included | Included |
| Framework and SDK upgrade to current versions | Not included | Not included | Included |
| Crash reporting added | Not included | Not included | Included |
| 30 days of fixes after release | Not included | Not included | Included |
| Order | Select | Select | Select |
Add what you need
Choose the size
Add what you need
Your total€500
ContinueThe standard price, plus whatever you add. Confirmed in writing before anything starts; nothing is charged until you accept it.
Questions
Which app frameworks do you work with?
Swift, Kotlin, React Native, Flutter and Ionic. For template apps, we need the full source, not only the compiled app.
Our previous developer left. Can you take over?
Usually, yes. The code review tells us whether the app is worth continuing or would be cheaper to rebuild, and we tell you plainly.
Why does a small change need library updates?
Apple and Google raise minimum requirements regularly. An app untouched for a year or two often cannot be submitted until its tools are updated.
Related searches
Related work
One-timeMobile app bug fixesCrashes and bugs in your iOS or Android app fixed, tested on real devices and released.from €290one-time
One-timeCross-platform mobile appOne codebase for iOS and Android, built in React Native or Flutter and published to both app stores.from €560one-time
MonthlyApp store managementYour App Store and Google Play listings, releases, reviews and policy changes looked after monthly.from €290per month
Order it
Standardised enough to order on its own. The price is confirmed in writing before anything starts.