diff --git a/Module.mk b/Module.mk
index 2a948a8..493b380 100644
--- a/Module.mk
+++ b/Module.mk
@@ -100,6 +100,8 @@ include src/main/bstio/Module.mk
 include src/main/camhook/Module.mk
 include src/main/cconfig/Module.mk
 include src/main/config/Module.mk
+include src/main/d3d9-frame-graph-hook/Module.mk
+include src/main/d3d9-monitor-check/Module.mk
 include src/main/d3d9-util/Module.mk
 include src/main/d3d9exhook/Module.mk
 include src/main/ddrhook-util/Module.mk
@@ -232,6 +234,9 @@ $(zipdir)/tools.zip: \
 		build/bin/indep-32/ezusb2-dbg-hook.dll \
 		build/bin/indep-32/ezusb2-tool.exe \
 		build/bin/indep-32/ezusb-tool.exe \
+		build/bin/indep-32/nvgpu.exe \
+		build/bin/indep-32/d3d9-frame-graph-hook.dll \
+		build/bin/indep-32/d3d9-monitor-check.exe \
 		| $(zipdir)/
 	$(V)echo ... $@
 	$(V)zip -j $@ $^
@@ -246,6 +251,9 @@ $(zipdir)/tools-x64.zip: \
 		build/bin/indep-64/iidx-ezusb2-exit-hook.dll \
 		build/bin/indep-64/jbiotest.exe \
 		build/bin/indep-64/mempatch-hook.dll \
+		build/bin/indep-64/nvgpu.exe \
+		build/bin/indep-64/d3d9-frame-graph-hook.dll \
+		build/bin/indep-64/d3d9-monitor-check.exe \
 		| $(zipdir)/
 	$(V)echo ... $@
 	$(V)zip -j $@ $^
diff --git a/README.md b/README.md
index 6827f95..fd05d5c 100644
--- a/README.md
+++ b/README.md
@@ -119,6 +119,8 @@ The following games are supported with their corresponding hook-libraries.
   - [extiotest](doc/tools/extiotest.md)
 - [aciotest](doc/tools/aciotest.md): Command line tool to quickly test ACIO devices
 - config: UI input/output configuration tool when using the default bemanitools API (geninput)
+- [d3d9-monitor-check](doc/tools/d3d9-monitor-check.md): Command line tool to check the monitor refresh rate of the
+  current GPU + monitor configuration
 - ir-beat-patch-9/10: Patch the IR beat phase on IIDX 9 and 10
 - [mempatch-hook](doc/tools/mempatch-hook.md): Patch raw memory locations in the target process
   based on the provided configuration
diff --git a/doc/tools/d3d9-monitor-check.md b/doc/tools/d3d9-monitor-check.md
new file mode 100644
index 0000000..83dc92d
--- /dev/null
+++ b/doc/tools/d3d9-monitor-check.md
@@ -0,0 +1,27 @@
+# D3D9 Monitor Check
+
+A separate application to run the infamous IIDX “monitor check” without having to run the actual
+game. The tool can be used to test measure the current avg. monitor refresh rate or debug/check if
+that value is fluctuating for some reason.
+
+The final avg. value that is provided at the end of the test can be used as input for other tooling
+or settings (e.g. patching charts to a different refresh rate on older games with bemanitools).
+
+Simply run the tool without any arguments to get a full synopsis with usage instructions.
+
+## "Accuracy" remarks
+
+The tool has been tested on an actual cabinet with `nvgpu` setting different custom timings. The
+accuracy seems to be even higher than what IIDX’s monitor check is actually showing. For example,
+with a custom timing of 59.900 hz, this tool yields fairly accurate and stable avg. 59.902 hz.
+
+The monitor check of IIDX 29 shows results of 59.8981 hz to 59.8997 hz on screen. As these are the
+only visible values to the user, determining a specific (avg.) value that can be used as input for
+other tooling or settings (e.g. patching charts to a different refresh rate on older games with
+bemanitools) is difficult. This doesn't mean that the game's monitor checks are actually
+inaccurate or wrong. Modern games with a built-in monitor check (starting IIDX 20) are syncing up
+fine and don't need any further patching or modifications.
+
+For older games, picking a value that is not as close as possible to an accurate avg. value can
+easily lead to issues with sync. So it's recommended to use the d3d9-monitor-check tool to get the
+most accurate value.
\ No newline at end of file
diff --git a/src/main/d3d9-monitor-check/Module.mk b/src/main/d3d9-monitor-check/Module.mk
new file mode 100644
index 0000000..0f66079
--- /dev/null
+++ b/src/main/d3d9-monitor-check/Module.mk
@@ -0,0 +1,13 @@
+exes            += d3d9-monitor-check \
+
+ldflags_d3d9-monitor-check   := \
+    -ld3d9 \
+    -ldwmapi \
+    -lgdi32 \
+    -ld3dx9 \
+
+libs_d3d9-monitor-check     := \
+    util \
+
+src_d3d9-monitor-check      := \
+    main.c \