Android and iOS both have a system setting to make texts bigger or smaller in general. Flutter takes it into account. It uses it by default.

Get the value “textScaleFactor” using MediaQuery


In case if you want to turn this mechanism off, or change scaling value for a part of your app, wrap it in your own MediaQuery object.

Widget build(BuildContext context) {
double myOwnScaleFactor = 1.0;
return MediaQuery(
child: Container(), // your app, or part of it
data: MediaQuery.of(context).copyWith(textScaleFactor: myOwnScaleFactor),

Unix bash scripts, Windows batch scripts — hard to manage for a Kotlin programmer.

Kscript has it’s issues: it’s not the same as Kotlin, hard to debug, different method of adding imports than standard Kotlin etc.

Happily you can make a simple command line Kotlin app.
Full example available here:


plugins {
application {
mainClassName = "me.szymanski.kotlinexec.example.Main"
dependencies {


import me.szymanski.kotlinexec.exec
import java.lang.Exception
import kotlin.system.exitProcess
object Main {
fun main(args: Array<String>) {
try {
println("Received arguments: ${args.joinToString(", ")}")
"echo \"Hello world\"".exec()
} catch (e: Exception) {
println(e.message) …

Scaling whole app

Starting from the most internal part:

  • SizedBox, to hard code a logical dimensions of the area that will be used by a child widget.
  • FittedBox, to scale its child to entirely fit the parent, maintaining its proportions.
  • Container, to set the background color of unused parts of the screen.
  • SizedBox.expand, to scale the background container to fit the whole screen.
class ScalingBox extends StatelessWidget {
Widget build(BuildContext context) {
double logicWidth = 600;
double logicHeight = 600;
return SizedBox.expand(
child: Container(
color: Colors.blueGrey,
child: FittedBox(
fit: BoxFit.contain,
alignment:, …

version 2 with Kotlin

In short:

  • Create a service account and get its authorization data json file.
  • Make a script uses above json and Google Play Developer API to perform actions on your account.


  • You can login as an owner of a Google Play Account.
  • You can make Kotlin code. Android Studio is good enough. You can create a pure Kotlin non-Android module and then run it.

Step 1. Create a service account and get access keys json file

  • Open Google Play console. Go to “Settings” > “Developer account” > “API access”.
  • In “Service Accounts” section, choose “Create Service Account”.
  • You will be sent to “Google Cloud Plaform” console. Continue creating account there.
  • Give it a…

Paweł Szymański

Android developer

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