The buyer question · Updated Jun 16

Best Smart Alarm Clocks

We put this question to ChatGPT, Claude, Gemini and Perplexity every week — then check their pick against the people who actually used it.

Power ranking

The top products right now.

#1
Nest Hub 2nd Gen
Best rank in this scope, recent weeks Jan 1 · #2 · Jan 1 · #3 · Feb 1 · #16-wk trend?
#2
Restore 3
Restore 3

by Hatch

#3
Loftie Clock (2nd Gen)
Loftie Clock (2nd Gen)

by Loftie

This week?

Nest Hub 2nd Gen took the top spot this week, moving up one place to hold the lead. Echo Spot climbed two ranks to land at number five, while two Philips Wake-Up Light models fell hard—the HF3520 dropped eleven places to twenty-six, and the Echo Dot variant fell nine places to seventeen. Loftie Clock's second generation entered the rankings at number three, and Amazon's Echo Dot with Clock made its debut at number seven. The smart alarm category is shifting.

90 newcomers 4 climbers 6 dropsNest Hub 2nd Gen #1

What AI values here

The top picks emphasize voice control from Alexa or Google Assistant paired with a small display and sunrise simulation features that gradually brighten to wake you naturally. These combinations address the core functions that differentiate smart alarms: hands-free control, visual feedback, and gentler waking.

How What AI Would Buy works

Act I

The ranking

Machines rank

ChatGPT, Claude, Gemini & Perplexity pick — we merge them into one list.

Act II

The check

People check

Real reviewers who used these products weigh in beside them.

Act III

The verdict

You decide

They agree, we say so. They split, we show you the gap.

Act one

What the machines think.

Three AI models read the category and rank every product. They agree on the very top — and split harder than anywhere else below it.

01

Model by model?

How each AI ranked it.

All three models open with the same #1 when they agree — below it their lists diverge. Each column is one model's own ranked picks; the lead pick sits a touch larger, and a lone tag marks a product only one model chose. The board below merges them into one machines-only top 10.

GPTGPTTop 5
  1. #1Echo Spot (2024)Echo Spot (2024)
  2. #2Nest Hub 2nd GenNest Hub 2nd Gen
  3. #3Smart Clock Essential with Google AssistantSmart Clock Essential with Google Assistantonly here
  4. #4Restore 3Restore 3
  5. #5SmartSleep Wake-up Light HF3520/60SmartSleep Wake-up Light HF3520/60only here
GeminiGeminiTop 5
  1. #1Echo Show 5 (5th Gen)Echo Show 5 (5th Gen)only here
  2. #2Nest Hub (3rd Gen)Nest Hub (3rd Gen)only here
  3. #3Restore 3Restore 3
  4. #4SmartSleep Wake-up Light 9700 (2026 Edition)SmartSleep Wake-up Light 9700 (2026 Edition)only here
  5. #5Echo Dot with Clock (7th Gen)Echo Dot with Clock (7th Gen)only here
unanimous #1 · lone = listed by one model onlyFull board →
Merged across ChatGPT · Claude · Gemini · Perplexity — machines only
Jun 15this week
1Nest Hub 2nd GenNest Hub 2nd GenGoogle2
2Restore 3Restore 3HatchNEW
3Loftie Clock (2nd Gen)Loftie Clock (2nd Gen)LoftieNEW
4Echo Spot (2024)Echo Spot (2024)Amazon5
5Restore 2Restore 2Hatch3
7Echo Show 5 (5th Gen)Echo Show 5 (5th Gen)AmazonNEW
8Echo Dot with Clock (5th Gen)Echo Dot with Clock (5th Gen)Amazon16
9Nest Hub (3rd Gen)Nest Hub (3rd Gen)GoogleNEW
10Echo Show 5 (3rd Gen)Echo Show 5 (3rd Gen)Amazon4
Top 10 of 100 · move vs previous snapshotSee the full merged board →

Act three · ★ new

Do they agree?

Put the AI rank and the reviewer score in one frame. The story here isn't a hidden gem — it's whether the machines and the room land together.

02

The merged board?

Every product the AIs ranked.

100 of 100
Time machine?
June 15 · latest
#?ProductAI consensus?Last 3 months?
#1▲ 2GoogleNest Hub 2nd GenGoogleGoogle· sleep trackingClaudeGPTGeminiPerplexity3/4 AIs · ranks #2–#3Intent rank, recent weeks Jun 1 · #2 · Jun 8 · #3 · Jun 15 · #1
#2newHatchRestore 3HatchHatch· premiumClaudeGPTGeminiPerplexity3/4 AIs · ranks #3–#12Intent rank, recent weeks Jun 15 · #2
#3newLoftieLoftie Clock (2nd Gen)LoftieLoftie· two-phase alarmClaudeGPTGeminiPerplexity3/4 AIs · ranks #6–#7Intent rank, recent weeks Jun 15 · #3
#4▲ 5AmazonEcho Spot (2024)AmazonAmazon· compact displayClaudeGPTGeminiPerplexity2/4 AIs · ranks #1Intent rank, recent weeks Jun 1 · #12 · Jun 8 · #9 · Jun 15 · #4
#5▼ 3HatchRestore 2HatchHatch· sunrise alarmClaudeGPTGeminiPerplexity2/4 AIs · ranks #5–#11Intent rank, recent weeks Jun 1 · #4 · Jun 8 · #2 · Jun 15 · #5
#6newAmazonEcho Show 5 (3rd Gen, 2025 release)AmazonAmazon· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #1Intent rank, recent weeks Jun 15 · #6
#7newAmazonEcho Show 5 (5th Gen)AmazonAmazon· videoClaudeGPTGeminiPerplexity1/4 AIs · ranks #1Intent rank, recent weeks Jun 15 · #7
#8▲ 16AmazonEcho Dot with Clock (5th Gen)AmazonAmazon· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #2Intent rank, recent weeks Jun 1 · #28 · Jun 8 · #24 · Jun 15 · #8
#9newGoogleNest Hub (3rd Gen)GoogleGoogle· sleep trackingClaudeGPTGeminiPerplexity1/4 AIs · ranks #2Intent rank, recent weeks Jun 15 · #9
#10▼ 4AmazonEcho Show 5 (3rd Gen)AmazonAmazon· bedside designClaudeGPTGeminiPerplexity1/4 AIs · ranks #3Intent rank, recent weeks Jun 1 · #5 · Jun 8 · #6 · Jun 15 · #10
#11newLenovoSmart Clock Essential with Google AssistantLenovoLenovo· led displayClaudeGPTGeminiPerplexity1/4 AIs · ranks #3Intent rank, recent weeks Jun 15 · #11
#12▼ 8LenovoSmart Clock 2LenovoLenovo· wireless chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #4Intent rank, recent weeks Jun 1 · #1 · Jun 8 · #4 · Jun 15 · #12
#13newLenovoSmart Clock 2 with Google AssistantLenovoLenovo· google assistantClaudeGPTGeminiPerplexity1/4 AIs · ranks #4Intent rank, recent weeks Jun 8 · #39 · Jun 15 · #13
#14newPhilipsSmartSleep Wake-up Light 9700 (2026 Edition)PhilipsPhilips· light therapyClaudeGPTGeminiPerplexity1/4 AIs · ranks #4Intent rank, recent weeks Jun 15 · #14
#15newAmazonEcho Dot with Clock (7th Gen)AmazonAmazon· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #5Intent rank, recent weeks Jun 15 · #15
#16newLenovoSmart Clock Essential with Alexa Built-inLenovoLenovo· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #5Intent rank, recent weeks Jun 15 · #16
#17▲ 2PhilipsSmartSleep Wake-up Light HF3520/60PhilipsPhilips· light therapyClaudeGPTGeminiPerplexity1/4 AIs · ranks #5Intent rank, recent weeks Jun 8 · #19 · Jun 15 · #17
#18newLoftieClock 2.0LoftieLoftie· digital detoxClaudeGPTGeminiPerplexity1/4 AIs · ranks #6Intent rank, recent weeks Jun 15 · #18
#19newLenovoSmart Clock Essential with Ambient Light DockLenovoLenovo· google assistantClaudeGPTGeminiPerplexity1/4 AIs · ranks #6Intent rank, recent weeks Jun 15 · #19
#20newWake Up Light Sunrise Alarm ClockJALL· budgetClaudeGPTGeminiPerplexity1/4 AIs · ranks #6Intent rank, recent weeks Jun 15 · #20
#21newLenovoSmart Clock Pro (5th Gen)LenovoLenovo· google assistantClaudeGPTGeminiPerplexity1/4 AIs · ranks #7Intent rank, recent weeks Jun 15 · #21
#22▼ 6PhilipsSmartSleep Wake-Up Light HF3520PhilipsPhilips· sunrise simulationClaudeGPTGeminiPerplexity1/4 AIs · ranks #7Intent rank, recent weeks Jun 1 · #6 · Jun 8 · #16 · Jun 15 · #22
#23newCasperGlow LightCasperCasper· portableClaudeGPTGeminiPerplexity1/4 AIs · ranks #8Intent rank, recent weeks Jun 1 · #39 · Jun 15 · #23
#24newAppleHomePod ClockAppleApple· siriClaudeGPTGeminiPerplexity1/4 AIs · ranks #8Intent rank, recent weeks Jun 15 · #24
#25newWithingsSleep Alarm ClockWithingsWithings· health trackingClaudeGPTGeminiPerplexity1/4 AIs · ranks #8Intent rank, recent weeks Jun 15 · #25
#26newPhilipsSmartSleep Wake-up Light HF3670/60PhilipsPhilips· sunrise simulationClaudeGPTGeminiPerplexity1/4 AIs · ranks #8Intent rank, recent weeks Jun 1 · #13 · Jun 15 · #26
#27newAmazonHalo Rise (2nd Gen)AmazonAmazon· sleep trackingClaudeGPTGeminiPerplexity1/4 AIs · ranks #9Intent rank, recent weeks Jun 15 · #27
#28newHomePod mini (bedside use)Siri-enabled Apple· siri alarmsClaudeGPTGeminiPerplexity1/4 AIs · ranks #9Intent rank, recent weeks Jun 15 · #28
#29newPhilipsSmartSleep Wake-up Light HF3650/60PhilipsPhilips· sunrise alarmClaudeGPTGeminiPerplexity1/4 AIs · ranks #9Intent rank, recent weeks Jun 15 · #29
#30newHoMedicsSoundSleep White Noise Machine Alarm ClockHoMedicsHoMedics· white noiseClaudeGPTGeminiPerplexity1/4 AIs · ranks #9Intent rank, recent weeks Jun 15 · #30
#31newDoppler Smart ClockSandman· multiple usb portsClaudeGPTGeminiPerplexity1/4 AIs · ranks #10
#32newSound OasisS-001-02 Sleep Sound Therapy SystemSound OasisSound Oasis· sound machineClaudeGPTGeminiPerplexity1/4 AIs · ranks #10
#33newWithingsSleep SenseWithingsWithings· health monitoringClaudeGPTGeminiPerplexity1/4 AIs · ranks #10
#35newiHomeiAVS16iHomeiHome· alexa built-inClaudeGPTGeminiPerplexity1/4 AIs · ranks #11Intent rank, recent weeks Jun 1 · #58
#36newiHomeiBTW281 Bluetooth Alarm ClockiHomeiHome· bluetoothClaudeGPTGeminiPerplexity1/4 AIs · ranks #11
#37newSonosSound AlarmSonosSonos· audio qualityClaudeGPTGeminiPerplexity1/4 AIs · ranks #11
#38newSonyICF-C1TSonySony· fm radioClaudeGPTGeminiPerplexity1/4 AIs · ranks #12Intent rank, recent weeks Jun 8 · #33
#39newSharpSmart Alarm Clock with AlexaSharpSharp· simple interfaceClaudeGPTGeminiPerplexity1/4 AIs · ranks #12
#40newIKEASYMFONISK Smart Alarm Lamp (2nd Gen)IKEAIKEA· ikea home smartClaudeGPTGeminiPerplexity1/4 AIs · ranks #12
#41newAuto Set Alarm Clock Radio DS198DreamSky· radioClaudeGPTGeminiPerplexity1/4 AIs · ranks #13
#42newAmazonEcho Show 8 (5th Gen)AmazonAmazon· videoClaudeGPTGeminiPerplexity1/4 AIs · ranks #13
#43newCasperGlow Light 2CasperCasper· gentle wake lightClaudeGPTGeminiPerplexity1/4 AIs · ranks #13
#44newLaMetric Time Wi‑Fi ClockLaMetric· notificationsClaudeGPTGeminiPerplexity1/4 AIs · ranks #13
#45newDigital AM/FM Clock Radio with USB ChargingMagnasonic· usb chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #14
#46newiHomeiGV1 Bedside Speaker with Google AssistantiHomeiHome· google assistantClaudeGPTGeminiPerplexity1/4 AIs · ranks #14
#47newGoogleNest Hub Max (3rd Gen)GoogleGoogle· video callsClaudeGPTGeminiPerplexity1/4 AIs · ranks #14
#48newPhilipsWake-Up Light HF3650PhilipsPhilips· sunrise therapyClaudeGPTGeminiPerplexity1/4 AIs · ranks #14
#49newLumieBodyclock Luxe 700 (2026 Edition)LumieLumie· light therapyClaudeGPTGeminiPerplexity1/4 AIs · ranks #15
#50newiHomeiBT235 Dual Alarm Clock with BluetoothiHomeiHome· bluetooth audioClaudeGPTGeminiPerplexity1/4 AIs · ranks #15
#51newXiaomiSmart Clock with ChargingXiaomiXiaomi· wireless padClaudeGPTGeminiPerplexity1/4 AIs · ranks #15
#52newEmersonSmartSet Alarm Clock Radio CKS1900EmersonEmerson· auto-setClaudeGPTGeminiPerplexity1/4 AIs · ranks #15
#53▼ 38JBLHorizon 2JBLJBL· ambient lightClaudeGPTGeminiPerplexity2/4 AIs · ranks #19–#22Intent rank, recent weeks Jun 1 · #7 · Jun 8 · #15
#54newTidalHi-Fi Smart ClockTidalTidal· hi-res audioClaudeGPTGeminiPerplexity1/4 AIs · ranks #16
#55newRCARCD30 Alarm Clock RadioRCARCA· compactClaudeGPTGeminiPerplexity1/4 AIs · ranks #16
#56newWake-Up Light Smart AlarmVobot· alexa built-inClaudeGPTGeminiPerplexity1/4 AIs · ranks #16
#57newLenovoYoga Smart Tab with Google Assistant Ambient ModeLenovoLenovo· smart display modeClaudeGPTGeminiPerplexity1/4 AIs · ranks #16
#58▼ 44AmazonEcho Show 8 (3rd Gen)AmazonAmazon· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #17Intent rank, recent weeks Jun 1 · #10 · Jun 8 · #14
#59newXiaomiSmart Clock 5 ProXiaomiXiaomi· valueClaudeGPTGeminiPerplexity1/4 AIs · ranks #17
#60newSharpSPC033D Alarm Clock RadioSharpSharp· led displayClaudeGPTGeminiPerplexity1/4 AIs · ranks #17
#61newBattery Operated Alarm ClockPeakeep· battery-poweredClaudeGPTGeminiPerplexity1/4 AIs · ranks #18
#62newXiaomiMi Smart ClockXiaomiXiaomi· google assistantClaudeGPTGeminiPerplexity1/4 AIs · ranks #18Intent rank, recent weeks Jun 1 · #42 · Jun 8 · #67
#63newStream Carbon Smart ClockVictrola· spotify connectClaudeGPTGeminiPerplexity1/4 AIs · ranks #18
#64newWake-Up MaxSoundcore by Anker· audioClaudeGPTGeminiPerplexity1/4 AIs · ranks #18
#65newCalmDream WeaverCalmCalm· meditationClaudeGPTGeminiPerplexity1/4 AIs · ranks #19
#66newHome LED Digital Alarm ClockTravelwey· large digitsClaudeGPTGeminiPerplexity1/4 AIs · ranks #19
#67newLenovoSmart Clock 3 (latest model)LenovoLenovo· google assistantClaudeGPTGeminiPerplexity1/4 AIs · ranks #19
#68newPhilipsHue Ambiance ClockPhilipsPhilips· philips hueClaudeGPTGeminiPerplexity1/4 AIs · ranks #20
#69newAnkerSoundcore Wakey Bluetooth Speaker Alarm ClockAnkerAnker· wireless chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #20
#70newCasioTQ-140-1BCasioCasio· basicClaudeGPTGeminiPerplexity1/4 AIs · ranks #20
#71newGarminVivosmart Bedside CompanionGarminGarmin· body battery syncClaudeGPTGeminiPerplexity1/4 AIs · ranks #20
#72newPhilipsAJT5300W/37 Bluetooth Clock RadioPhilipsPhilips· bluetoothClaudeGPTGeminiPerplexity1/4 AIs · ranks #21
#73newBraunBC21 Wireless Charging Digital Alarm ClockBraunBraun· wireless chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #21
#74newAqaraBedside Hub ProAqaraAqara· matterClaudeGPTGeminiPerplexity1/4 AIs · ranks #21
#75newCalmCalm Alarm ClockCalmCalm· mindfulness alarmsClaudeGPTGeminiPerplexity1/4 AIs · ranks #21
#76newC1 Pro Smart Alarm ClockHomtime· wireless chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #22
#78newSamsungSmartThings Sleep HubSamsungSamsung· samsung smartthingsClaudeGPTGeminiPerplexity1/4 AIs · ranks #22
#79newOuraHorizon AlarmOuraOura· oura integrationClaudeGPTGeminiPerplexity1/4 AIs · ranks #23
#80newModel One Digital Gen 2Tivoli Audio· radioClaudeGPTGeminiPerplexity1/4 AIs · ranks #23
#81newSmart Bedside Alarm ClockMpow· large led displayClaudeGPTGeminiPerplexity1/4 AIs · ranks #23
#82newWake Up Light Sunrise Alarm Clock (latest model)JALL· sunriseClaudeGPTGeminiPerplexity1/4 AIs · ranks #23
#83newLumieBodyclock Shine 300LumieLumie· sunrise sunsetClaudeGPTGeminiPerplexity2/4 AIs · ranks #24–#27Intent rank, recent weeks Jun 1 · #53
#84newOrtus 3Roberts Radio· sunrise alarmClaudeGPTGeminiPerplexity1/4 AIs · ranks #24
#85newC by GESmart Alarm Clock (4th Gen)C by GEC by GE· valueClaudeGPTGeminiPerplexity1/4 AIs · ranks #24
#86newArkenstone Smart Sunrise Alarm ClockDekala· sunrise lampClaudeGPTGeminiPerplexity1/4 AIs · ranks #26
#87newBeddi GlowWitti· wireless chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #29
#88newCKS708-2 Alarm Clock RadioiTOMA· projectorClaudeGPTGeminiPerplexity1/4 AIs · ranks #26
#89newCube Timer Smart ClockMooas· flip designClaudeGPTGeminiPerplexity1/4 AIs · ranks #26
#90newCubieBlue Smart ClockBrandstand· bluetooth speakerClaudeGPTGeminiPerplexity1/4 AIs · ranks #29
#91newAmazonEcho Pop with Clock (2nd Gen)AmazonAmazon· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #26
#92newAmazonEcho Spot (2nd Gen, 2025 redesign)AmazonAmazon· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #30
#93newAnkerEufy Genie Smart Speaker with AlexaAnkerAnker· alexaClaudeGPTGeminiPerplexity1/4 AIs · ranks #27
#94newNetatmoHealthy Home ClockNetatmoNetatmo· air qualityClaudeGPTGeminiPerplexity1/4 AIs · ranks #28
#95newiHomeiBTW38 Bluetooth Color Changing Alarm ClockiHomeiHome· qi wireless chargingClaudeGPTGeminiPerplexity1/4 AIs · ranks #28
#96newSonyICF-C1PJSonySony· time projectionClaudeGPTGeminiPerplexity1/4 AIs · ranks #28Intent rank, recent weeks Jun 1 · #49
#97newSonyICF‑C1PJ Projection Alarm Clock RadioSonySony· projection displayClaudeGPTGeminiPerplexity1/4 AIs · ranks #29
#98newMina SunriseLexon· minimalistClaudeGPTGeminiPerplexity1/4 AIs · ranks #25
#99newGooglePixel Bedside HubGoogleGoogle· androidClaudeGPTGeminiPerplexity1/4 AIs · ranks #30
#100newProjection Alarm Clock AC-189ANJANK· projectorClaudeGPTGeminiPerplexity1/4 AIs · ranks #27

as of June 16 · vs June 8?

03

Race chart?

6 weeks of rank trajectories.

#1#6#11#146/16/86/15#1Nest Hub 2nd Gen#2Restore 3#3Loftie Clock (2nd Gen)#4Echo Spot (2024)
04

Before you buy

Questions buyers ask.

  • Are smart alarm clocks worth it?

    Smart alarm clocks combine a bedside display with voice control and smart home access, so they function as timekeeping and home-hub devices rather than just alarm devices. The value depends on whether you want a single device that handles both waking up and controlling other smart home items.

  • What is the world's best alarm clock?

    The Nest Hub 2nd Gen ranks at the top and includes sleep tracking, Google Assistant voice control, and a smart display. It treats the alarm clock as a bedside hub rather than a standalone audio device.

  • Which is the best digital alarm clock?

    Top picks pair a display screen with either Google Assistant or Alexa, wireless charging, and sunrise simulation features. The Smart Clock Essential offers Google Assistant and a compact display at an affordable price point, while the Smart Clock 2 adds wireless charging in a small form.

  • Is Lumie or Hatch better?

    Hatch's Restore 2 is ranked among the top smart alarm clocks and emphasizes app control, sunrise alarms, and soundscapes. The comparison depends on whether you prioritize a phone-controlled device with soundscape options or other features like voice control and smart home integration.

  • What features should I look for in a smart alarm clock?

    Key features across top picks include a display screen, voice control through Google Assistant or Alexa, wireless charging, and sunrise simulation lighting. These allow the device to function as both an alarm and a bedside smart home hub.

  • Should I get a smart alarm clock with a display or without?

    All top picks include a display screen paired with voice control. This design treats the alarm clock as a bedside hub for checking time, controlling smart home devices, and accessing voice assistants rather than a standalone audio device.

  • Do the AI assistants agree on the top pick?

    Not quite — they split across 3 different picks. Claude leads with Amazon Echo Spot (2024); ChatGPT leads with Amazon Echo Spot (2024); Gemini leads with Hatch Restore 2; and Perplexity leads with Amazon Echo Show 5 (3rd Gen, 2025 release).

05

If the pick isn't right for you?

The other picks still in rotation.

Restore 3
#2
Restore 3
Intent rank, recent weeks Jun 15 · #2

Wins when

better for premium

Aggregate score?58.9
Loftie Clock (2nd Gen)
#3
Loftie Clock (2nd Gen)
Intent rank, recent weeks Jun 15 · #3

Wins when

better for two-phase alarm

Aggregate score?57.9
Echo Spot (2024)
#4
Echo Spot (2024)
Intent rank, recent weeks Jun 1 · #12 · Jun 8 · #9 · Jun 15 · #4

Wins when

better for compact display

Aggregate score?50.0
Restore 2
#5
Restore 2
Intent rank, recent weeks Jun 1 · #4 · Jun 8 · #2 · Jun 15 · #5

Wins when

better for sunrise alarm

Aggregate score?35.9
Echo Show 5 (3rd Gen, 2025 release)
#6
Echo Show 5 (3rd Gen, 2025 release)
Intent rank, recent weeks Jun 15 · #6

Wins when

better for alexa

Aggregate score?25.0
07

Beyond this question

Where the winner shows up elsewhere.

context & history

You want to wake up on time without hating yourself. That matters more than the features. A smart alarm clock either wakes you or it does not. The rest—the light, the sound, the app—serves that one purpose. Pick one that does the job and then let it alone.

The good ones separate on three points. Some wake you with light that builds over time. Others rely on sound and let you adjust it from bed. A few do both. Check what your phone already does. Some people need nothing more than their phone on the nightstand. Others sleep through anything but light. Know which one you are before you buy.