The Smart Device Compare comparison

Apollo MSR-2 vs Shelly Presence Gen4

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Apollo MSR-2 and Shelly Presence Gen4

A summary of selected recorded differences between these presence sensors. Check the full specification table below for details and conditions.

Feature differences among your selected devices

Bluetooth (connectivity): Apollo MSR-2 — No; Shelly Presence Gen4 — Yes (Bluetooth 5 LE for onboarding.).
Multi Person Detection (features): Apollo MSR-2 — No; Shelly Presence Gen4 — Yes (Identifies up to 6 people at once and maps them onto up to 10 customizable detection zones.).
Alexa (integrations): Apollo MSR-2 — No (Apollo ships ESPHome firmware aimed at Home Assistant and publishes no Alexa skill); Shelly Presence Gen4 — Yes (Via Matter. Shelly also lists the Alexa Motion Sensor capability.).
Apple Home (integrations): Apollo MSR-2 — No; Shelly Presence Gen4 — Yes (Via Matter).

Specifications to check side by side

Zigbee (connectivity): Apollo MSR-2 — No; Shelly Presence Gen4 — Zigbee Hub required (Zigbee 3.0 (802.15.4). A five-press on the button switches the firmware between Matter over Wi-Fi (the default) and Zigbee. Using the Zigbee radio needs a Zigbee coordinator.).
Wired (power): Apollo MSR-2 — USB-C; Shelly Presence Gen4 — Yes (Powered by USB-C at 5 VDC, 1 A. Nominal consumption 2.5 W, 3.5 W maximum. There is no battery option.).

Information still to confirm

5 of 25 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
Check the full table and manufacturer documentation before ruling out a device.

These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.

Compare capabilities, compatibility and setup requirements.

Option 1 · Apollo Automation

Apollo MSR-2

Catalog update date not recorded

View full device profile

Option 2 · Shelly

Shelly Presence Gen4

Last updated October 2026

View full device profile

What the catalog tells us

Understand the tradeoffs.

These counts describe the available data, not a quality score. More features do not automatically make a better device.

9differences with recorded values for every device

5rows with missing or unspecified information

Consider your setup

Apple Home

Apollo MSR-2No
Shelly Presence Gen4Yes

Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.

Inspect the specifications

Consider your setup

Matter

Apollo MSR-2No
Shelly Presence Gen4Yes

Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.

Inspect the specifications

Your priorities, side by side

Focus on what changes.

Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.

Differences onlyMy priorities (0)

Showing 25 of 25 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Fall Alerts

Apollo MSR-2: No
Shelly Presence Gen4: No

Presence Alerts

Apollo MSR-2: Yes
Shelly Presence Gen4: Yes
Catalog note
Presence and vacancy can trigger lights, HVAC, blinds, security or a notification through Shelly Smart Control, Matter or local webhooks.

Connectivity

2.4 GHz Wi-Fi

Apollo MSR-2: Yes
Shelly Presence Gen4: Yes
Catalog note
Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz.

5 GHz Wi-Fi

Apollo MSR-2: No
Shelly Presence Gen4: No

Bluetooth

Apollo MSR-2

Shelly Presence Gen4

Yes

Manufacturer source

Bluetooth 5 LE is specified.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Bluetooth 5 LE for onboarding.

Thread

Apollo MSR-2: No
Shelly Presence Gen4: No

Z Wave

Apollo MSR-2: No
Shelly Presence Gen4: No

Zigbee

Apollo MSR-2: No
Shelly Presence Gen4: Zigbee Hub required
Catalog note
Zigbee 3.0 (802.15.4). A five-press on the button switches the firmware between Matter over Wi-Fi (the default) and Zigbee. Using the Zigbee radio needs a Zigbee coordinator.

Features

Angle Of Detection

Apollo MSR-2: Not recorded
Shelly Presence Gen4: 140° Horizontal / 120° Vertical

Area Of Detection

Apollo MSR-2

Not recorded

Shelly Presence Gen4

42 m²

Manufacturer source

The stated detection area is up to 42 square metres.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Automations

Apollo MSR-2: Yes
Shelly Presence Gen4: Yes
Catalog note
20 schedules, scripting, MQTT, 20 webhooks and local logic on the device, plus Matter occupancy for platform automations.

History Records

Apollo MSR-2: Yes
Shelly Presence Gen4: Not recorded

Multi Person Detection

Apollo MSR-2

Shelly Presence Gen4

Yes

Manufacturer source

The sensor supports simultaneous detection of multiple occupants.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Identifies up to 6 people at once and maps them onto up to 10 customizable detection zones.

Range Of Detection

Apollo MSR-2: Not recorded
Shelly Presence Gen4: 8m / 26ft

Sleep Monitoring

Apollo MSR-2: No
Shelly Presence Gen4: No

Zigbee Router

Apollo MSR-2: No
Shelly Presence Gen4: Not recorded
Catalog note
USB-C powered and able to join a Zigbee network, but Shelly's knowledge base does not say whether it repeats traffic as a Zigbee router.

Integrations

Alexa

Apollo MSR-2: No
Catalog note
Apollo ships ESPHome firmware aimed at Home Assistant and publishes no Alexa skill
Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly also lists the Alexa Motion Sensor capability.

Apple Home

Apollo MSR-2: No
Shelly Presence Gen4: Yes
Catalog note
Via Matter

Google Home

Apollo MSR-2: No
Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly also lists the Google Smart Home Occupancy Sensing trait.

Home Assistant

Apollo MSR-2: Yes
Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly's knowledge base also lists Home Assistant as a supported platform, plus local MQTT, webhooks and an embedded web interface.

Matter

Apollo MSR-2

Shelly Presence Gen4

Yes

Manufacturer source

Matter uses the Wi-Fi connection.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Matter over Wi-Fi. CSA certificate CSA25E3FMAT48529-24, certified 2025-11-18, vendor 0x1490 product 0x1821.

SmartThings

Apollo MSR-2: No
Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly also lists the SmartThings Presence Sensor capability.

Power

Wired

Apollo MSR-2

USB-C

Shelly Presence Gen4

Yes

Manufacturer source

Continuous power is supplied through 5 V USB-C.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Sensors

Light

Apollo MSR-2

Yes

Manufacturer source

An ambient-light sensor supports lighting automations.

Apollo MSR-2 manufacturer product page →

Source section: Product sensor description
Model: Apollo MSR-2
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Document check only; not a hands-on test or verification of every regional or firmware variant.

Shelly Presence Gen4

Yes

Manufacturer source

The light sensor reports dark, twilight and bright states.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Built-in light sensor that reports dark, twilight and bright states for lighting-aware automations.

Presence

Apollo MSR-2

Yes

Manufacturer source

The MSR-2 uses an LD2410B millimetre-wave sensor.

Apollo MSR-2 manufacturer product page →

Source section: Product sensor description
Model: Apollo MSR-2
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Document check only; not a hands-on test or verification of every regional or firmware variant.

Shelly Presence Gen4

Yes

Manufacturer source

Presence detection uses millimetre-wave radar.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

60-64 GHz mmWave radar that detects people who are sitting still, with still detection out to 3 m and tracking of up to 6 people across up to 10 zones.

Specifications for Apollo MSR-2 versus Shelly Presence Gen4
Specification	Apollo MSR-2	Shelly Presence Gen4
Alerts
Fall Alerts	No	No
Presence Alerts	Yes	Yes Catalog note Presence and vacancy can trigger lights, HVAC, blinds, security or a notification through Shelly Smart Control, Matter or local webhooks.
Connectivity
2.4 GHz Wi-Fi	Yes	Yes Catalog note Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz.
5 GHz Wi-Fi	No	No
Bluetooth	No	Yes Manufacturer source Bluetooth 5 LE is specified. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Bluetooth 5 LE for onboarding.
Thread	No	No
Z Wave	No	No
Zigbee	No	Zigbee Hub required Catalog note Zigbee 3.0 (802.15.4). A five-press on the button switches the firmware between Matter over Wi-Fi (the default) and Zigbee. Using the Zigbee radio needs a Zigbee coordinator.
Features
Angle Of Detection	Not recorded	140° Horizontal / 120° Vertical
Area Of Detection	Not recorded	42 m² Manufacturer source The stated detection area is up to 42 square metres. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant.
Automations	Yes	Yes Catalog note 20 schedules, scripting, MQTT, 20 webhooks and local logic on the device, plus Matter occupancy for platform automations.
History Records	Yes	Not recorded
Multi Person Detection	No	Yes Manufacturer source The sensor supports simultaneous detection of multiple occupants. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Identifies up to 6 people at once and maps them onto up to 10 customizable detection zones.
Range Of Detection	Not recorded	8m / 26ft
Sleep Monitoring	No	No
Zigbee Router	No	Not recorded Catalog note USB-C powered and able to join a Zigbee network, but Shelly's knowledge base does not say whether it repeats traffic as a Zigbee router.
Integrations
Alexa	No Catalog note Apollo ships ESPHome firmware aimed at Home Assistant and publishes no Alexa skill	Yes Catalog note Via Matter. Shelly also lists the Alexa Motion Sensor capability.
Apple Home	No	Yes Catalog note Via Matter
Google Home	No	Yes Catalog note Via Matter. Shelly also lists the Google Smart Home Occupancy Sensing trait.
Home Assistant	Yes	Yes Catalog note Via Matter. Shelly's knowledge base also lists Home Assistant as a supported platform, plus local MQTT, webhooks and an embedded web interface.
Matter	No	Yes Manufacturer source Matter uses the Wi-Fi connection. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Matter over Wi-Fi. CSA certificate CSA25E3FMAT48529-24, certified 2025-11-18, vendor 0x1490 product 0x1821.
SmartThings	No	Yes Catalog note Via Matter. Shelly also lists the SmartThings Presence Sensor capability.
Power
Wired	USB-C	Yes Manufacturer source Continuous power is supplied through 5 V USB-C. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Powered by USB-C at 5 VDC, 1 A. Nominal consumption 2.5 W, 3.5 W maximum. There is no battery option.
Sensors
Light	Yes Manufacturer source An ambient-light sensor supports lighting automations. Apollo MSR-2 manufacturer product page → Source section Product sensor description Model Apollo MSR-2 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant.	Yes Manufacturer source The light sensor reports dark, twilight and bright states. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Built-in light sensor that reports dark, twilight and bright states for lighting-aware automations.
Presence	Yes Manufacturer source The MSR-2 uses an LD2410B millimetre-wave sensor. Apollo MSR-2 manufacturer product page → Source section Product sensor description Model Apollo MSR-2 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant.	Yes Manufacturer source Presence detection uses millimetre-wave radar. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note 60-64 GHz mmWave radar that detects people who are sitting still, with still detection out to 3 m and tracking of up to 6 people across up to 10 zones.

Know what’s behind the comparison.

The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.

Read our comparison methodology