diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 95faa9b..0bcbbbf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,6 +9,18 @@ on:
 permissions: read-all
 
 jobs:
+  CheckVersionBumps:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+          fetch-depth: 0
+      - name: "Check version bumps"
+        env:
+          BASE_REF: ${{ github.base_ref }}
+        run: python3 Scripts/check-version-bumps.py "origin/$BASE_REF"
   GenerateAppMatrix:
     runs-on: ubuntu-latest
     outputs:
diff --git a/Apps/Brainfuck/manifest.properties b/Apps/Brainfuck/manifest.properties
index 5187f61..46cf5ac 100644
--- a/Apps/Brainfuck/manifest.properties
+++ b/Apps/Brainfuck/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.brainfuck
-version.name=0.15.0
-version.code=15
+version.name=0.16.0
+version.code=16
 name=Brainfuck
 description=Brainfuck esoteric language interpreter
 app.0.id=tactility.brainfuck
diff --git a/Apps/Breakout/main/Source/Breakout.cpp b/Apps/Breakout/main/Source/Breakout.cpp
index d4b78ce..a8729ff 100644
--- a/Apps/Breakout/main/Source/Breakout.cpp
+++ b/Apps/Breakout/main/Source/Breakout.cpp
@@ -17,7 +17,6 @@
 #include <tactility/drivers/keyboard.h>
 
 #include <lvgl/lvgl.h>
-#include <lvgl/fonts.h>
 
 constexpr auto* TAG = "Breakout";
 
@@ -151,19 +150,6 @@ static int scoreBrick(Context* ctx, int idx);
 
 /* ── UI Creation ──────────────────────────────────────────────── */
 
-static uint32_t getToolbarHeight(UiDensity uiDensity) {
-    if (uiDensity == LVGL_UI_DENSITY_COMPACT) {
-        return lvgl_get_text_font_height(FONT_SIZE_DEFAULT) * 1.4f;
-    } else {
-        return lvgl_get_text_font_height(FONT_SIZE_LARGE) * 2.2f;
-    }
-}
-
-static uint32_t getActionIconPadding(UiDensity uiDensity) {
-    auto toolbar_height = getToolbarHeight(uiDensity);
-    return (uiDensity != LVGL_UI_DENSITY_COMPACT) ? (uint32_t)(toolbar_height * 0.2f) : 8;
-}
-
 /* ── Event Callbacks (declared here so createWidgets can wire them up) ── */
 
 static void onTick(lv_timer_t* timer);
@@ -228,38 +214,9 @@ void breakoutCreateWidgets(lv_obj_t* parent, void* userData) {
     lv_obj_set_style_text_color(ctx->livesLabel, lv_palette_main(LV_PALETTE_RED), 0);
     lv_obj_align(ctx->livesLabel, LV_ALIGN_CENTER, 0, 0);
 
-    auto ui_density = lvgl_get_ui_density();
-    auto toolbar_height = getToolbarHeight(ui_density);
-    auto icon_padding = getActionIconPadding(ui_density);
-
-    // Toolbar buttons wrapper
-    lv_obj_t* btnsWrapper = lv_obj_create(toolbar);
-    lv_obj_set_width(btnsWrapper, LV_SIZE_CONTENT);
-    lv_obj_set_flex_flow(btnsWrapper, LV_FLEX_FLOW_ROW);
-    lv_obj_set_style_pad_all(btnsWrapper, icon_padding / 2, LV_STATE_DEFAULT);
-    lv_obj_set_style_border_width(btnsWrapper, 0, LV_STATE_DEFAULT);
-    lv_obj_set_style_bg_opa(btnsWrapper, 0, LV_STATE_DEFAULT);
-
-    // Pause button
-    lv_obj_t* pauseBtn = lv_btn_create(btnsWrapper);
-    lv_obj_set_size(pauseBtn, toolbar_height - icon_padding, toolbar_height - icon_padding);
-    lv_obj_set_style_pad_all(pauseBtn, 0, LV_STATE_DEFAULT);
-    lv_obj_align(pauseBtn, LV_ALIGN_CENTER, 0, 0);
-    lv_obj_add_event_cb(pauseBtn, onPauseClicked, LV_EVENT_CLICKED, ctx);
-
-    lv_obj_t* pauseIcon = lv_label_create(pauseBtn);
-    lv_label_set_text(pauseIcon, LV_SYMBOL_PAUSE);
-    lv_obj_align(pauseIcon, LV_ALIGN_CENTER, 0, 0);
-
-    // Sound toggle button
-    lv_obj_t* soundBtn = lv_btn_create(btnsWrapper);
-    lv_obj_set_size(soundBtn, toolbar_height - icon_padding, toolbar_height - icon_padding);
-    lv_obj_set_style_pad_all(soundBtn, 0, LV_STATE_DEFAULT);
-    lv_obj_align(soundBtn, LV_ALIGN_CENTER, 0, 0);
-    lv_obj_add_event_cb(soundBtn, onSoundToggled, LV_EVENT_CLICKED, ctx);
-
-    ctx->soundBtnIcon = lv_label_create(soundBtn);
-    lv_obj_align(ctx->soundBtnIcon, LV_ALIGN_CENTER, 0, 0);
+    lvgl_toolbar_add_text_button_action(toolbar, LV_SYMBOL_PAUSE, onPauseClicked, ctx);
+    lv_obj_t* soundBtn = lvgl_toolbar_add_text_button_action(toolbar, "", onSoundToggled, ctx);
+    ctx->soundBtnIcon = lv_obj_get_child(soundBtn, 0);
     updateSoundIcon(ctx);
 
     // Screen size detection (The Book)
diff --git a/Apps/Breakout/manifest.properties b/Apps/Breakout/manifest.properties
index cba12e5..239ec50 100644
--- a/Apps/Breakout/manifest.properties
+++ b/Apps/Breakout/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.breakout
-version.name=0.19.0
-version.code=19
+version.name=0.20.0
+version.code=20
 name=Breakout
 description=Classic brick-breaking arcade game
 app.0.id=tactility.breakout
diff --git a/Apps/BusyBoxVi/manifest.properties b/Apps/BusyBoxVi/manifest.properties
index fbae5ea..d05436d 100644
--- a/Apps/BusyBoxVi/manifest.properties
+++ b/Apps/BusyBoxVi/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4,posix-x86_64
 id=tactility.busyboxvi
-version.name=0.1.0
-version.code=1
+version.name=0.2.0
+version.code=2
 name=Vi
 description=BusyBox vi text editor
 app.0.id=tactility.busyboxvi
diff --git a/Apps/Calculator/manifest.properties b/Apps/Calculator/manifest.properties
index 2894e48..67c5bd9 100644
--- a/Apps/Calculator/manifest.properties
+++ b/Apps/Calculator/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.calculator
-version.name=0.16.0
-version.code=16
+version.name=0.17.0
+version.code=17
 name=Calculator
 app.0.id=tactility.calculator
 app.0.name=Calculator
diff --git a/Apps/Diceware/manifest.properties b/Apps/Diceware/manifest.properties
index bd20ea5..4cbf3ef 100644
--- a/Apps/Diceware/manifest.properties
+++ b/Apps/Diceware/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.diceware
-version.name=0.18.0
-version.code=18
+version.name=0.19.0
+version.code=19
 name=Diceware
 description=Password generator
 app.0.id=tactility.diceware
diff --git a/Apps/Doom/manifest.properties b/Apps/Doom/manifest.properties
index a7ed958..e15169f 100644
--- a/Apps/Doom/manifest.properties
+++ b/Apps/Doom/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32p4
 id=tactility.doom
-version.name=0.9.0
-version.code=9
+version.name=0.10.0
+version.code=10
 name=Doom
 description=Classic DOOM. Tab5 only, keyboard required to play.
 app.0.id=tactility.doom
diff --git a/Apps/EpubReader/manifest.properties b/Apps/EpubReader/manifest.properties
index fc8dd48..b9d44f3 100644
--- a/Apps/EpubReader/manifest.properties
+++ b/Apps/EpubReader/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32s3,esp32p4
 id=tactility.epubreader
-version.name=0.15.0
-version.code=15
+version.name=0.16.0
+version.code=16
 name=ePub Reader
 description=ePub and text file reader. Requires PSRAM!
 app.0.id=tactility.epubreader
diff --git a/Apps/EspNowBridge/manifest.properties b/Apps/EspNowBridge/manifest.properties
index 4c4e6d2..a4fd13e 100644
--- a/Apps/EspNowBridge/manifest.properties
+++ b/Apps/EspNowBridge/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32p4
 id=tactility.espnowbridge
-version.name=0.13.0
-version.code=13
+version.name=0.14.0
+version.code=14
 name=ESP-NOW Bridge
 description=Companion app for updating P4 device C6 co-processor firmware to enable ESP-NOW bridge support.
 app.0.id=tactility.espnowbridge
diff --git a/Apps/GPIO/manifest.properties b/Apps/GPIO/manifest.properties
index 5523529..74e8959 100644
--- a/Apps/GPIO/manifest.properties
+++ b/Apps/GPIO/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.gpio
-version.name=0.18.0
-version.code=18
+version.name=0.19.0
+version.code=19
 name=GPIO
 description=Shows the live state of all GPIO pins
 app.0.id=tactility.gpio
diff --git a/Apps/GraphicsDemo/manifest.properties b/Apps/GraphicsDemo/manifest.properties
index 77618aa..c951512 100644
--- a/Apps/GraphicsDemo/manifest.properties
+++ b/Apps/GraphicsDemo/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.graphicsdemo
-version.name=0.16.0
-version.code=16
+version.name=0.17.0
+version.code=17
 name=Graphics Demo
 app.0.id=tactility.graphicsdemo
 app.0.name=Graphics Demo
diff --git a/Apps/HelloWorld/manifest.properties b/Apps/HelloWorld/manifest.properties
index e8b166b..993c05d 100644
--- a/Apps/HelloWorld/manifest.properties
+++ b/Apps/HelloWorld/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4,posix-x86_64
 id=tactility.helloworld
-version.name=0.16.0
-version.code=16
+version.name=0.17.0
+version.code=17
 name=Hello World
 app.0.id=tactility.helloworld
 app.0.name=Hello World
diff --git a/Apps/M5UnitTest/manifest.properties b/Apps/M5UnitTest/manifest.properties
index 6f43ea1..58e9f5f 100644
--- a/Apps/M5UnitTest/manifest.properties
+++ b/Apps/M5UnitTest/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32s3,esp32p4
 id=tactility.m5unittest
-version.name=0.14.0
-version.code=14
+version.name=0.15.0
+version.code=15
 name=M5 Unit Test
 app.0.id=tactility.m5unittest
 app.0.name=M5 Unit Test
diff --git a/Apps/Magic8Ball/manifest.properties b/Apps/Magic8Ball/manifest.properties
index b818016..71187d0 100644
--- a/Apps/Magic8Ball/manifest.properties
+++ b/Apps/Magic8Ball/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.magic8ball
-version.name=0.15.0
-version.code=15
+version.name=0.16.0
+version.code=16
 name=Magic 8-Ball
 app.0.id=tactility.magic8ball
 app.0.name=Magic 8-Ball
diff --git a/Apps/MediaKeys/manifest.properties b/Apps/MediaKeys/manifest.properties
index da7b86b..d67f71f 100644
--- a/Apps/MediaKeys/manifest.properties
+++ b/Apps/MediaKeys/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32s3,esp32p4
 id=tactility.mediakeys
-version.name=0.16.0
-version.code=16
+version.name=0.17.0
+version.code=17
 name=Media Keys
 description=Bluetooth media keys. Touch or Physical Keyboard control\nB - previous, P - play/pause, N - next, M - mute, D - volume down, U - volume up.\nQ or ESC to exit focus.
 app.0.id=tactility.mediakeys
diff --git a/Apps/MystifyDemo/manifest.properties b/Apps/MystifyDemo/manifest.properties
index 827f35b..8dbf615 100644
--- a/Apps/MystifyDemo/manifest.properties
+++ b/Apps/MystifyDemo/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.mystifydemo
-version.name=0.17.0
-version.code=17
+version.name=0.18.0
+version.code=18
 name=Mystify Demo
 description=A graphics demo that is inspired by a Windows 95 screensaver.
 app.0.id=tactility.mystifydemo
diff --git a/Apps/Neatvi/manifest.properties b/Apps/Neatvi/manifest.properties
index e8feb16..d530d13 100644
--- a/Apps/Neatvi/manifest.properties
+++ b/Apps/Neatvi/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4,posix-x86_64
 id=tactility.neatvi
-version.name=0.2.0
-version.code=2
+version.name=0.3.0
+version.code=3
 requires.ram=2M
 name=Vi
 description=Neatvi text editor
diff --git a/Apps/Rcc700/manifest.properties b/Apps/Rcc700/manifest.properties
index 1c8fc0a..7fef6b9 100644
--- a/Apps/Rcc700/manifest.properties
+++ b/Apps/Rcc700/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4,posix-x86_64
 id=tactility.rcc700
-version.name=0.1.0
-version.code=1
+version.name=0.2.0
+version.code=2
 requires.ram=2M
 name=rcc700
 description=Mini C compiler for ESP32 RISC-V
diff --git a/Apps/SerialConsole/manifest.properties b/Apps/SerialConsole/manifest.properties
index 45029e3..d0086ac 100644
--- a/Apps/SerialConsole/manifest.properties
+++ b/Apps/SerialConsole/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.serialconsole
-version.name=0.18.0
-version.code=18
+version.name=0.19.0
+version.code=19
 name=Serial Console
 app.0.id=tactility.serialconsole
 app.0.name=Serial Console
diff --git a/Apps/Snake/manifest.properties b/Apps/Snake/manifest.properties
index 828cc63..aa9560d 100644
--- a/Apps/Snake/manifest.properties
+++ b/Apps/Snake/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.snake
-version.name=0.19.0
-version.code=19
+version.name=0.20.0
+version.code=20
 name=Snake
 description=Classic Snake game
 app.0.id=tactility.snake
diff --git a/Apps/TamaTac/manifest.properties b/Apps/TamaTac/manifest.properties
index e96b108..d9a5da0 100644
--- a/Apps/TamaTac/manifest.properties
+++ b/Apps/TamaTac/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.tamatac
-version.name=0.14.0
-version.code=14
+version.name=0.15.0
+version.code=15
 name=TamaTac
 description=Virtual pet inspired by Tamagotchi. Only runs on devices with PSRAM.
 app.0.id=tactility.tamatac
diff --git a/Apps/TodoList/manifest.properties b/Apps/TodoList/manifest.properties
index e57cde6..0032ce3 100644
--- a/Apps/TodoList/manifest.properties
+++ b/Apps/TodoList/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.todolist
-version.name=0.17.0
-version.code=17
+version.name=0.18.0
+version.code=18
 name=Todo List
 description=Simple task list manager
 app.0.id=tactility.todolist
diff --git a/Apps/TwoEleven/manifest.properties b/Apps/TwoEleven/manifest.properties
index 7fc405c..a9a558c 100644
--- a/Apps/TwoEleven/manifest.properties
+++ b/Apps/TwoEleven/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4
 id=tactility.twoeleven
-version.name=0.18.0
-version.code=18
+version.name=0.19.0
+version.code=19
 name=2048
 description=A fun, customizable 2048 sliding tile game for tactility!\nSlide tiles to combine numbers and reach 2048.\nChoose grid sizes: 3x3 (easy), 4x4 (classic), 5x5, or 6x6 (expert).
 app.0.id=tactility.twoeleven
diff --git a/Apps/Xcc700/manifest.properties b/Apps/Xcc700/manifest.properties
index fcf9e1e..e2c98a1 100644
--- a/Apps/Xcc700/manifest.properties
+++ b/Apps/Xcc700/manifest.properties
@@ -2,8 +2,8 @@ manifest.version=0.3
 target.sdk=0.8.0-dev
 target.platforms=esp32,esp32s3,esp32c6,esp32p4,posix-x86_64
 id=tactility.xcc700
-version.name=0.1.0
-version.code=1
+version.name=0.2.0
+version.code=2
 name=xcc700
 description=Mini C compiler for ESP32 Xtensa
 app.0.id=tactility.xcc700
diff --git a/Scripts/check-version-bumps.py b/Scripts/check-version-bumps.py
new file mode 100755
index 0000000..51f1615
--- /dev/null
+++ b/Scripts/check-version-bumps.py
@@ -0,0 +1,159 @@
+#!/usr/bin/env python3
+"""Check that apps changed on the current branch have bumped version code and version name.
+
+Diff the current branch against a base ref: for each app directory under Apps/ that has
+changes, verify that `version.code` increased and `version.name` changed in its
+manifest.properties.
+
+Usage:
+  check-version-bumps.py [base_ref]   (default base_ref: main)
+
+Exit code:
+  0  – all changed apps have bumped versions (or no apps changed)
+  1  – one or more apps are missing version bumps
+"""
+
+import subprocess
+import sys
+from pathlib import Path
+
+APPS_DIR = "Apps"
+MANIFEST = "manifest.properties"
+VERSION_CODE_KEY = "version.code"
+VERSION_NAME_KEY = "version.name"
+
+
+def run(cmd: list[str], **kwargs) -> subprocess.CompletedProcess:
+    return subprocess.run(cmd, capture_output=True, text=True, check=True, **kwargs)
+
+
+def parse_properties(text: str) -> dict[str, str]:
+    props: dict[str, str] = {}
+    for line in text.splitlines():
+        line = line.strip()
+        if not line or line.startswith("#"):
+            continue
+        if "=" in line:
+            key, _, value = line.partition("=")
+            props[key.strip()] = value.strip()
+    return props
+
+
+def parse_version_code(value: str) -> int | None:
+    """Return version code as an integer, or None if it isn't a non-negative integer."""
+    return int(value) if value.isdecimal() else None
+
+
+def get_changed_apps(base_ref: str) -> set[str]:
+    """Return set of app names that have file changes vs base_ref."""
+    result = run(["git", "diff", base_ref, "--name-only", "--", APPS_DIR])
+    apps: set[str] = set()
+    for line in result.stdout.splitlines():
+        parts = line.split("/")
+        if len(parts) >= 2 and parts[0] == APPS_DIR:
+            apps.add(parts[1])
+    return apps
+
+
+def get_file_at_ref(ref: str, path: str) -> str | None:
+    """Return file contents at a git ref, or None if it doesn't exist."""
+    try:
+        result = run(["git", "show", f"{ref}:{path}"])
+        return result.stdout
+    except subprocess.CalledProcessError:
+        return None
+
+
+def path_exists_at_ref(ref: str, path: str) -> bool:
+    """Return True if a file or directory exists at a git ref."""
+    try:
+        run(["git", "cat-file", "-e", f"{ref}:{path}"])
+        return True
+    except subprocess.CalledProcessError:
+        return False
+
+
+def main() -> int:
+    base_ref = sys.argv[1] if len(sys.argv) > 1 else "main"
+
+    # Make sure base ref exists
+    try:
+        run(["git", "rev-parse", "--verify", base_ref])
+    except subprocess.CalledProcessError:
+        print(f"Error: cannot resolve ref '{base_ref}'", file=sys.stderr)
+        return 1
+
+    changed_apps = get_changed_apps(base_ref)
+    if not changed_apps:
+        print("No app changes detected.")
+        return 0
+
+    print(f"Changed apps: {', '.join(sorted(changed_apps))}\n")
+
+    failures: list[str] = []
+
+    for app_name in sorted(changed_apps):
+        manifest_path = f"{APPS_DIR}/{app_name}/{MANIFEST}"
+
+        base_content = get_file_at_ref(base_ref, manifest_path)
+        head_content = get_file_at_ref("HEAD", manifest_path)
+
+        if head_content is None:
+            if not path_exists_at_ref("HEAD", f"{APPS_DIR}/{app_name}"):
+                print(f"  {app_name}: removed app – skipped")
+                continue
+            failures.append(f"{app_name}: manifest.properties missing on HEAD")
+            continue
+
+        if base_content is None:
+            # New app – no check needed
+            print(f"  {app_name}: new app (no base manifest) – OK")
+            continue
+
+        base_props = parse_properties(base_content)
+        head_props = parse_properties(head_content)
+
+        missing = [key for key in (VERSION_CODE_KEY, VERSION_NAME_KEY) if not head_props.get(key)]
+        if missing:
+            failures.append(f"{app_name}: {', '.join(missing)} missing on HEAD")
+            continue
+
+        base_code = base_props.get(VERSION_CODE_KEY, "")
+        head_code = head_props.get(VERSION_CODE_KEY, "")
+        base_name = base_props.get(VERSION_NAME_KEY, "")
+        head_name = head_props.get(VERSION_NAME_KEY, "")
+
+        head_code_num = parse_version_code(head_code)
+        if head_code_num is None:
+            failures.append(f"{app_name}: version.code is not an integer ({head_code})")
+            continue
+
+        # A non-numeric base code can't be compared; accept any valid head code then
+        base_code_num = parse_version_code(base_code)
+        code_bumped = base_code_num is None or head_code_num > base_code_num
+        name_bumped = base_name != head_name
+
+        if code_bumped and name_bumped:
+            print(f"  {app_name}: version bumped ({base_name}→{head_name}, {base_code}→{head_code}) – OK")
+        else:
+            problems: list[str] = []
+            if not code_bumped:
+                problems.append(f"version.code not increased ({base_code}→{head_code})")
+            if not name_bumped:
+                problems.append(f"version.name unchanged ({head_name})")
+            failures.append(f"{app_name}: {', '.join(problems)}")
+
+    print()
+
+    if failures:
+        print("FAIL – missing version bump:")
+        for f in failures:
+            print(f"  ✗ {f}")
+        return 1
+
+    print("PASS – all changed apps have bumped versions.")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())