Free tool
Package ID Renamer
Paste a new bundle id and get the exact files, lines and Gradle values to change in a Flutter or Android project.
Enter both package ids to generate the checklist.
Other free tools
Play Store Signing Key Generator
Fill in your app details and get the exact keytool command, key.properties file and Gradle signing config for a Flutter or Android release build.
Firebase & Maps Cost Calculator
Estimate what a delivery or marketplace app costs per month — Firestore reads and writes, map loads and Routes calls, at current list prices.
AdMob Test ID Cheatsheet
Copy-paste Google test unit ids for banner, interstitial, rewarded and native, for both platforms.