Compare OK-to-wake clocks

Start with the controls you want. Compare up to three clocks side by side, with each generation kept separate.

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14 exact models and generations · most documented first

Ordered by confirmed US listing, then current-model status, then how many of the 22 compared controls are documented. This is not a quality ranking.

LittleHippo MELLA

Version 2.0 manual

A no-app all-in-one clock with a separate nap countdown, sound machine and optional pre-wake cue.

The CR2032 preserves settings but does not provide documented operating backup; schedules also need to be toggled on after first setup.

Controls
Set on the clock
Power
External power required
Market
US

Hatch Rest+ 2nd gen

2nd gen

Households that want Hatch's app scheduling plus operational battery backup for room-to-room use or an outage.

Initial setup and schedule editing still depend on the app and Wi-Fi; premium library content may not play offline.

Controls
App setup required
Power
Runs on battery
Market
US

Tommee Tippee Connected Sleep Trainer

Connected

Remote schedule changes, several named cues and a countdown nap mode from the Tommee Tippee app.

Setup needs an account, app and 2.4 GHz Wi-Fi, and preserved settings during a power cut do not mean the clock keeps operating.

Controls
App setup required
Power
External power required
Market
US

Core Innovations Baby Shark ALM204

ALM204

An on-device daily sleep/wake schedule with operational battery power, a parent lock and Bluetooth audio.

The programmed wake sequence glows and sings, so it is not the choice for a silent visual-only morning cue; there is no nap schedule.

Controls
Set on the clock
Power
Runs on battery
Market
US

Hatch Rest 2nd gen

2nd gen

Multi-step app routines with custom light and sound cues, when day-specific scheduling is not essential.

It must stay powered, and routine editing is unavailable during an internet outage even though saved routines can continue through Bluetooth fallback.

Controls
App setup required
Power
External power required
Market
US

Nanit Sound + Light Machine

Day-specific standard sound/light routines and remote control, especially for an existing Nanit household.

The camera-triggered OK to Wake mode is not a stand-alone feature: it requires a Pro Camera, compatible mount and eligible Insights plan.

Controls
App setup required
Power
Runs on battery
Market
US

Tommee Tippee Groclock

USB/Ollie display

Parents who want separate night and daytime-nap wake times with no app or account.

The two modes are activated on the clock and use clock-time wake settings; there is no operating battery, and a long outage requires correcting the time.

Controls
Set on the clock
Power
External power required
Market
Exact US version not established

Yogasleep Light to Rise

A no-app setup with custom sleep schedules, a clock display and built-in sounds.

It must remain plugged in and the USB wall adapter is not included; the saved-settings window is not operating battery backup.

Controls
Set on the clock
Power
External power required
Market
US

Skip Hop Dream & Shine Sleep Trainer

185250-07 manual

A no-app clock with separate sleep, wake and 30–120 minute nap modes that can operate on AA batteries.

The model remains in the official instruction library but lacks a current direct product page, so it should not be presented as a current buy until merchant identity is checked.

Controls
Set on the clock
Power
Runs on battery
Market
US

Skip Hop Smart Snail

9O259910

Multi-step routines, more than one caregiver device and Bluetooth-local control without a Wi-Fi network.

The app is iPhone/iPad-only, edits require the phone within 30 feet, the wall adapter is not included, and the direct product page is currently out of stock.

Controls
App setup required
Power
External power required
Market
US, CA

ZAZU Sam the Sheep

V16 manual, 2024-12

A no-app clock with fixed daily bedtime and wake times, a 30–180 minute nap countdown and separate audible alarm.

It cannot store a separate weekend wake time, and batteries last longest only with low brightness and a short night-light timer.

Controls
Set on the clock
Power
Runs on battery
Market
US, UK, EU

Pabobo Kid’Sleep Essential

2025/26 manual

A fully on-device silent-or-audible wake indicator with nap countdown, display-off control and AA fallback.

The current product is documented for European markets; AA operation is described as limited and should not be treated as a measured travel runtime.

Controls
Set on the clock
Power
Runs on battery
Market
EU, UK

Purflo Snoozee Sleep Trainer Clock

2025 manual

A rechargeable, on-device UK clock with automatic bedtime and wake color changes and seven display levels.

It uses one daily schedule, has no nap timer, and the manual allows the audible alarm only within its documented 4:00 a.m.–2:59 p.m. wake range.

Controls
Set on the clock
Power
Runs on battery
Market
UK

ZAZU Pam the Penguin

V3 manual, 2022-04

A simple automatic daily orange-to-green wake cue with a rechargeable battery and optional Bluetooth speaker.

It has one daily wake time, no bedtime schedule or nap timer, no published battery runtime, and current direct stock is limited.

Controls
Set on the clock
Power
Runs on battery
Market
UK, EU