diff --git a/firmware/application/external/detector_rx/main.cpp b/firmware/application/external/detector_rx/main.cpp
new file mode 100644
index 000000000..2745f970e
--- /dev/null
+++ b/firmware/application/external/detector_rx/main.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2023 Bernd Herzog
+ *
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "ui.hpp"
+#include "ui_detector_rx.hpp"
+#include "ui_navigation.hpp"
+#include "external_app.hpp"
+
+namespace ui::external_app::detector_rx {
+void initialize_app(ui::NavigationView& nav) {
+    nav.push<DetectorRxView>();
+}
+}  // namespace ui::external_app::detector_rx
+
+extern "C" {
+
+__attribute__((section(".external_app.app_detector_rx.application_information"), used)) application_information_t _application_information_detector_rx = {
+    /*.memory_location = */ (uint8_t*)0x00000000,
+    /*.externalAppEntry = */ ui::external_app::detector_rx::initialize_app,
+    /*.header_version = */ CURRENT_HEADER_VERSION,
+    /*.app_version = */ VERSION_MD5,
+
+    /*.app_name = */ "Detector",
+    /*.bitmap_data = */
+    {
+        0x00,
+        0x00,
+        0x00,
+        0x00,
+        0x04,
+        0x20,
+        0x12,
+        0x48,
+        0x8A,
+        0x51,
+        0xCA,
+        0x53,
+        0xCA,
+        0x53,
+        0x8A,
+        0x51,
+        0x12,
+        0x48,
+        0x84,
+        0x21,
+        0xC0,
+        0x03,
+        0x40,
+        0x02,
+        0x60,
+        0x06,
+        0x20,
+        0x04,
+        0x30,
+        0x0C,
+        0xF0,
+        0x0F},
+    /*.icon_color = */ ui::Color::orange().v,
+    /*.menu_location = */ app_location_t::RX,
+    /*.desired_menu_position = */ -1,
+
+    // this has to be the biggest baseband used by the app. SPEC
+    /*.m4_app_tag = portapack::spi_flash::image_tag_nfm */ {'P', 'W', 'F', 'M'},
+    /*.m4_app_offset = */ 0x00000000,  // will be filled at compile time
+};
+}
diff --git a/firmware/application/external/detector_rx/ui_detector_rx.cpp b/firmware/application/external/detector_rx/ui_detector_rx.cpp
new file mode 100644
index 000000000..a1dd3b935
--- /dev/null
+++ b/firmware/application/external/detector_rx/ui_detector_rx.cpp
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2018 Furrtek
+ * Copyright (C) 2023 gullradriel, Nilorea Studio Inc.
+ *
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "ui_detector_rx.hpp"
+#include "ui_fileman.hpp"
+#include "ui_freqman.hpp"
+#include "baseband_api.hpp"
+#include "file.hpp"
+#include "oversample.hpp"
+#include "ui_font_fixed_8x16.hpp"
+
+using namespace portapack;
+using namespace tonekey;
+using portapack::memory::map::backup_ram;
+
+namespace ui::external_app::detector_rx {
+
+// Function to map the value from one range to another
+int32_t DetectorRxView::map(int32_t value, int32_t fromLow, int32_t fromHigh, int32_t toLow, int32_t toHigh) {
+    return toLow + (value - fromLow) * (toHigh - toLow) / (fromHigh - fromLow);
+}
+
+void DetectorRxView::focus() {
+    field_lna.focus();
+}
+
+DetectorRxView::~DetectorRxView() {
+    // reset performance counters request to default
+    shared_memory.request_m4_performance_counter = 0;
+    receiver_model.disable();
+    audio::output::stop();
+    baseband::shutdown();
+}
+
+void DetectorRxView::on_timer() {
+    freq_index++;
+    if (freq_mode == 0 && freq_index >= tetra_uplink_monitoring_frequencies_hz.size()) freq_index = 0;  // TETRA UP
+    if (freq_mode == 1 && freq_index >= lora_monitoring_frequencies_hz.size()) freq_index = 0;          // Lora
+    if (freq_mode == 2 && freq_index >= remotes_monitoring_frequencies_hz.size()) freq_index = 0;       // Remotes
+
+    if (freq_mode == 2)
+        freq_ = remotes_monitoring_frequencies_hz[freq_index];
+    else if (freq_mode == 1)
+        freq_ = lora_monitoring_frequencies_hz[freq_index];
+    else
+        freq_ = tetra_uplink_monitoring_frequencies_hz[freq_index];
+    receiver_model.set_target_frequency(freq_);
+}
+
+DetectorRxView::DetectorRxView(NavigationView& nav)
+    : nav_{nav} {
+    add_children({
+        &labels,
+        &field_lna,
+        &field_vga,
+        &field_rf_amp,
+        &field_volume,
+        &text_frequency,
+        &freq_stats_rssi,
+        &freq_stats_db,
+        &text_beep_squelch,
+        &field_beep_squelch,
+        &rssi,
+        &rssi_graph,
+        &field_mode,
+    });
+
+    // activate vertical bar mode
+    rssi.set_vertical_rssi(true);
+
+    freq_ = receiver_model.target_frequency();
+
+    field_beep_squelch.set_value(beep_squelch);
+    field_beep_squelch.on_change = [this](int32_t v) {
+        beep_squelch = v;
+    };
+
+    rssi_graph.set_nb_columns(256);
+
+    change_mode();
+    rssi.set_peak(true, 3000);
+
+    // FILL STEP OPTIONS
+    freq_stats_rssi.set_style(Theme::getInstance()->bg_darkest);
+    freq_stats_db.set_style(Theme::getInstance()->bg_darkest);
+
+    field_mode.on_change = [this](size_t, int32_t value) {
+        freq_mode = value;
+        freq_index = 0;
+        switch (value) {
+            case 1:  // Lora
+                text_frequency.set("   433, 868, 915 Mhz");
+                break;
+            case 2:  // Remotes
+                text_frequency.set("        433, 315 Mhz");
+                break;
+            default:
+            case 0:  // TETRA UP
+                text_frequency.set("         380-390 Mhz");
+                break;
+        }
+    };
+}
+
+void DetectorRxView::on_statistics_update(const ChannelStatistics& statistics) {
+    static int16_t last_max_db = 0;
+    static uint8_t last_min_rssi = 0;
+    static uint8_t last_avg_rssi = 0;
+    static uint8_t last_max_rssi = 0;
+
+    rssi_graph.add_values(rssi.get_min(), rssi.get_avg(), rssi.get_max(), statistics.max_db);
+
+    // refresh db
+    if (last_max_db != statistics.max_db) {
+        last_max_db = statistics.max_db;
+        freq_stats_db.set("Power: " + to_string_dec_int(statistics.max_db) + " db");
+        rssi.set_db(statistics.max_db);
+    }
+    // refresh rssi
+    if (last_min_rssi != rssi_graph.get_graph_min() || last_avg_rssi != rssi_graph.get_graph_avg() || last_max_rssi != rssi_graph.get_graph_max()) {
+        last_min_rssi = rssi_graph.get_graph_min();
+        last_avg_rssi = rssi_graph.get_graph_avg();
+        last_max_rssi = rssi_graph.get_graph_max();
+        freq_stats_rssi.set("RSSI: " + to_string_dec_uint(last_min_rssi) + "/" + to_string_dec_uint(last_avg_rssi) + "/" + to_string_dec_uint(last_max_rssi));
+    }
+
+    if (statistics.max_db > beep_squelch) {
+        baseband::request_audio_beep(map(statistics.max_db, -100, 20, 400, 2600), 24000, 150);
+    }
+
+} /* on_statistic_updates */
+
+size_t DetectorRxView::change_mode() {
+    audio::output::stop();
+    receiver_model.disable();
+    baseband::shutdown();
+
+    audio_sampling_rate = audio::Rate::Hz_24000;
+    baseband::run_image(portapack::spi_flash::image_tag_capture);
+    receiver_model.set_modulation(ReceiverModel::Mode::Capture);
+
+    baseband::set_sample_rate(DETECTOR_BW, get_oversample_rate(DETECTOR_BW));
+    // The radio needs to know the effective sampling rate.
+    auto actual_sampling_rate = get_actual_sample_rate(DETECTOR_BW);
+    receiver_model.set_sampling_rate(actual_sampling_rate);
+    receiver_model.set_baseband_bandwidth(filter_bandwidth_for_sampling_rate(actual_sampling_rate));
+
+    audio::set_rate(audio_sampling_rate);
+    audio::output::start();
+    receiver_model.set_headphone_volume(receiver_model.headphone_volume());  // WM8731 hack.
+
+    receiver_model.enable();
+
+    return 0;
+}
+
+}  // namespace ui::external_app::detector_rx
diff --git a/firmware/application/external/detector_rx/ui_detector_rx.hpp b/firmware/application/external/detector_rx/ui_detector_rx.hpp
new file mode 100644
index 000000000..4814f297f
--- /dev/null
+++ b/firmware/application/external/detector_rx/ui_detector_rx.hpp
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2018 Furrtek
+ * Copyright (C) 2023 gullradriel, Nilorea Studio Inc.
+ *
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _UI_DETECTOR_RX
+#define _UI_DETECTOR_RX
+
+#include "analog_audio_app.hpp"
+#include "app_settings.hpp"
+#include "audio.hpp"
+#include "baseband_api.hpp"
+#include "file.hpp"
+#include "freqman_db.hpp"
+#include "portapack_persistent_memory.hpp"
+#include "radio_state.hpp"
+#include "receiver_model.hpp"
+#include "string_format.hpp"
+#include "ui.hpp"
+#include "ui_mictx.hpp"
+#include "ui_receiver.hpp"
+#include "ui_spectrum.hpp"
+
+namespace ui::external_app::detector_rx {
+
+#define DETECTOR_BW 750000
+
+class DetectorRxView : public View {
+   public:
+    DetectorRxView(NavigationView& nav);
+    ~DetectorRxView();
+
+    void focus() override;
+
+    std::string title() const override { return "Detector RX"; };
+
+   private:
+    NavigationView& nav_;
+
+    RxRadioState radio_state_{};
+
+    int32_t map(int32_t value, int32_t fromLow, int32_t fromHigh, int32_t toLow, int32_t toHigh);
+    size_t change_mode();
+    void on_statistics_update(const ChannelStatistics& statistics);
+    void set_display_freq(int64_t freq);
+    void on_timer();
+
+    uint8_t freq_index = 0;
+    rf::Frequency freq_ = {433920000};
+    int32_t beep_squelch = 0;
+    audio::Rate audio_sampling_rate = audio::Rate::Hz_48000;
+    uint8_t freq_mode = 0;
+
+    app_settings::SettingsManager settings_{
+        "rx_detector",
+        app_settings::Mode::RX,
+        {
+            {"beep_squelch"sv, &beep_squelch},
+        }};
+
+    Labels labels{
+        {{UI_POS_X(0), UI_POS_Y(0)}, "LNA:   VGA:   AMP:  VOL:     ", Theme::getInstance()->fg_light->foreground}};
+
+    LNAGainField field_lna{
+        {UI_POS_X(4), UI_POS_Y(0)}};
+
+    VGAGainField field_vga{
+        {UI_POS_X(11), UI_POS_Y(0)}};
+
+    RFAmpField field_rf_amp{
+        {UI_POS_X(18), UI_POS_Y(0)}};
+
+    AudioVolumeField field_volume{
+        {UI_POS_X(24), UI_POS_Y(0)}};
+
+    OptionsField field_mode{
+        {UI_POS_X(0), UI_POS_Y(1)},
+        9,
+        {
+            {"TETRA UP", 0},
+            {"Lora", 1},
+            {"Remotes", 2},
+        }};
+
+    Text text_frequency{
+        {UI_POS_X_RIGHT(20), UI_POS_Y(1), UI_POS_WIDTH(20), UI_POS_DEFAULT_HEIGHT},
+        ""};
+
+    Text text_beep_squelch{
+        {UI_POS_X_RIGHT(9), UI_POS_Y(2), UI_POS_WIDTH(4), UI_POS_DEFAULT_HEIGHT},
+        "Bip>"};
+
+    NumberField field_beep_squelch{
+        {UI_POS_X_RIGHT(5), UI_POS_Y(2)},
+        4,
+        {-100, 20},
+        1,
+        ' ',
+    };
+
+    // RSSI: XX/XX/XXX
+    Text freq_stats_rssi{
+        {UI_POS_X(0), UI_POS_Y(2), UI_POS_WIDTH(15), UI_POS_DEFAULT_HEIGHT},
+    };
+
+    // Power: -XXX db
+    Text freq_stats_db{
+        {UI_POS_X(0), UI_POS_Y(3), UI_POS_WIDTH(15), UI_POS_DEFAULT_HEIGHT},
+    };
+
+    RSSIGraph rssi_graph{
+        {UI_POS_X(0), UI_POS_Y(5), UI_POS_WIDTH_REMAINING(5), UI_POS_HEIGHT_REMAINING(6)},
+    };
+
+    RSSI rssi{
+        {UI_POS_X_RIGHT(5), UI_POS_Y(5), UI_POS_WIDTH(5), UI_POS_HEIGHT_REMAINING(6)},
+    };
+
+    MessageHandlerRegistration message_handler_stats{
+        Message::ID::ChannelStatistics,
+        [this](const Message* const p) {
+            this->on_statistics_update(static_cast<const ChannelStatisticsMessage*>(p)->statistics);
+        }};
+
+    MessageHandlerRegistration message_handler_frame_sync{
+        Message::ID::DisplayFrameSync,
+        [this](const Message* const) {
+            this->on_timer();
+        }};
+
+    const std::vector<uint32_t> remotes_monitoring_frequencies_hz = {
+        // Around 315 MHz (common for older remotes, key fobs in some regions)
+        // Window centered on 315 MHz, covers 314.625 - 315.375 MHz
+        315000000,
+
+        // Around 433.92 MHz (very common for remotes, sensors, key fobs globally)
+        // Window centered on 433.92 MHz, covers 433.545 - 434.295 MHz
+        433920000,
+    };
+    const std::vector<uint32_t> lora_monitoring_frequencies_hz = {
+        // EU433 Band (Europe, typically 433.05 MHz to 434.79 MHz)
+        // Scanning the approximate range 433.0 MHz to 434.8 MHz with 750kHz steps
+        433375000,  // Covers 433.000 - 433.750 MHz
+        434125000,  // Covers 433.750 - 434.500 MHz (includes 433.92 MHz)
+        434875000,  // Covers 434.500 - 435.250 MHz (covers up to 434.79 MHz)
+
+        // EU868 Band (Europe, typically 863 MHz to 870 MHz, specific channels around 868 MHz)
+        // Targeting common LoRaWAN channel groups (approx 867.0 - 868.6 MHz) with 750kHz steps
+        867375000,  // Covers 867.000 - 867.750 MHz
+        868125000,  // Covers 867.750 - 868.500 MHz
+        868875000,  // Covers 868.500 - 869.250 MHz (covers up to 868.6 MHz)
+
+        // US915 Band (North America, typically 902 MHz to 928 MHz, specific channels around 915 MHz)
+        // Providing a few sample windows around the 915 MHz area with 750kHz steps.
+        // This band is wide; a full scan would require many more frequencies.
+        914250000,  // Covers 913.875 - 914.625 MHz
+        915000000,  // Covers 914.625 - 915.375 MHz (Centered on 915 MHz)
+        915750000,  // Covers 915.375 - 916.125 MHz
+    };
+    const std::vector<uint32_t> tetra_uplink_monitoring_frequencies_hz = {
+        // Band starts at 380,000,000 Hz, ends at 390,000,000 Hz.
+        // First center: 380,000,000 + 375,000 = 380,375,000 Hz
+        // Last center:  380,375,000 + 13 * 750,000 = 390,125,000 Hz (14 frequencies total for this band)
+        380375000,  // Covers 380.000 - 380.750 MHz
+        381125000,  // Covers 380.750 - 381.500 MHz
+        381875000,  // Covers 381.500 - 382.250 MHz
+        382625000,  // Covers 382.250 - 383.000 MHz
+        383375000,  // Covers 383.000 - 383.750 MHz
+        384125000,  // Covers 383.750 - 384.500 MHz
+        384875000,  // Covers 384.500 - 385.250 MHz
+        385625000,  // Covers 385.250 - 386.000 MHz
+        386375000,  // Covers 386.000 - 386.750 MHz
+        387125000,  // Covers 386.750 - 387.500 MHz
+        387875000,  // Covers 387.500 - 388.250 MHz
+        388625000,  // Covers 388.250 - 389.000 MHz
+        389375000,  // Covers 389.000 - 389.750 MHz
+        390125000,  // Covers 389.750 - 390.500 MHz
+    };
+};
+
+}  // namespace ui::external_app::detector_rx
+
+#endif
diff --git a/firmware/application/external/external.cmake b/firmware/application/external/external.cmake
index 2ab738950..02e10e123 100644
--- a/firmware/application/external/external.cmake
+++ b/firmware/application/external/external.cmake
@@ -212,6 +212,10 @@ set(EXTCPPSRC
 	#gfxEQ
 	external/gfxeq/main.cpp
 	external/gfxeq/ui_gfxeq.cpp	
+
+	#detector_rx
+	external/detector_rx/main.cpp
+	external/detector_rx/ui_detector_rx.cpp		
 )
 
 set(EXTAPPLIST
@@ -266,4 +270,5 @@ set(EXTAPPLIST
 	scanner
 	level
 	gfxeq
+	detector_rx
 )
diff --git a/firmware/application/external/external.ld b/firmware/application/external/external.ld
index ff7c3c189..10ecd03c6 100644
--- a/firmware/application/external/external.ld
+++ b/firmware/application/external/external.ld
@@ -74,6 +74,7 @@ MEMORY
     ram_external_app_level      (rwx) : org = 0xADE10000, len = 32k
     ram_external_app_gfxeq      (rwx) : org = 0xADE20000, len = 32k
     ram_external_app_noaaapt_rx   (rwx) : org = 0xADE30000, len = 32k
+    ram_external_app_detector_rx   (rwx) : org = 0xADE40000, len = 32k
 }
 
 SECTIONS
@@ -383,4 +384,13 @@ SECTIONS
         KEEP(*(.external_app.app_gfxeq.application_information));
         *(*ui*external_app*gfxeq*);
     } > ram_external_app_gfxeq
+
+    .external_app_detector_rx : ALIGN(4) SUBALIGN(4)
+    {
+        KEEP(*(.external_app.app_detector_rx.application_information));
+        *(*ui*external_app*detector_rx*);
+    } > ram_external_app_detector_rx
+
+
 }
+
diff --git a/firmware/common/ui.hpp b/firmware/common/ui.hpp
index edec2d404..49e52c84e 100644
--- a/firmware/common/ui.hpp
+++ b/firmware/common/ui.hpp
@@ -31,6 +31,8 @@ namespace ui {
 
 // default font height
 #define UI_POS_DEFAULT_HEIGHT 16
+// small height
+#define UI_POS_DEFAULT_HEIGHT_SMALL 8
 // default font width
 #define UI_POS_DEFAULT_WIDTH 8
 // px position of the linenum-th character (Y)