Use the gradle settings which got Infinite Timer building correctly to see if it also works for this project.

README.md

@@ -1,6 +1,11 @@
 # CarbUp
 Calculate cost-effectiveness of foods on a High Carb Low Fat lifestyle.
 
-# Status
-Working on open sourcing my free app that has existed on the Play Store for years.
-This was my first app and will likely also be the first to get a Kotlin rewrite since it looks ancient on newer devices! ;D
+## Status
+No new features planned, only updates are to keep the app available on newer Android versions.
+
+## Update Notes
+
+### 2025-07-11
+(This article)[https://sijus.medium.com/resurrecting-a-5-year-old-android-app-a-developers-journey-59d8f5689e5b]
+ was very helpful in getting this app updated from SDK 25 to 36.

app/build.gradle

@@ -1,19 +1,18 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.2"
-
+    namespace "com.hyperling.carbupbeta"
+    compileSdkVersion 36
     defaultConfig {
         applicationId "com.hyperling.carbupbeta"
         minSdkVersion 8
-        targetSdkVersion 23
-        versionCode 6
-        versionName "0.11"
+        targetSdkVersion 36
+        versionCode 7
+        versionName "1.0.0"
     }
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }

build.gradle

@@ -2,10 +2,18 @@
 
 buildscript {
     repositories {
-        jcenter()
+        mavenCentral()
+        maven {
+            url 'https://jitpack.io'
+        }
+        google()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.5.0'
+        classpath 'com.android.tools.build:gradle:8.11.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -14,6 +22,11 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
+        mavenCentral()
+        google()
     }
 }
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Apr 10 15:27:10 PDT 2013
+#Fri Jul 11 14:14:34 MST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip