Comparison

Sleep Data Recorder vs Night Hark

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sleep Data Recorder

Effortlessly track your sleep patterns and daily body weight by logging your bedtime and wake-up times. The app automatically calculates your time in bed and asleep, and syncs data with Apple's HealthKit for easy monitoring of your health progress.

Highlights
  • Sleep pattern monitoring
  • Body weight logging
  • Automatic time calculation
  • HealthKit integration
  • Simple one-button entry
Read full description

Sleep plays a vital role in your good health and well-being. Getting enough sleep can help protect your mental health, physical health and quality of life. Monitor your sleep pattern and progress with the HealthKit app on your iPhone. There's no need to remember or write down the time you went to bed or got up. With Sleep Recorder adding those data points to Apple's HealthKit is simple. Just tap the buttons and the app records the time you went to bed and got up and automatically calculates the time you were in bed and asleep. Record your daily body weight in HealthKit with Weight Recorder an easy to use selector and one button entry.

About

Night Hark

Features
Read full description

Have you ever wondered about the symphony of sounds that accompany your nightly rest? Night Hark brings you the power not just to listen but to delve deeper into the intricate tapestry of your sleep environment. Listen & Explore: Night Hark elegantly records and analyses ambient sounds while you slumber, offering you a unique opportunity to experience your sleep in an entirely new way. With the ability to listen back to the recordings, you'll uncover a world of nocturnal whispers, soothing melodies, and unexpected serenades (and the occasional snoring). Insightful Data at Your Fingertips: But Night Hark goes beyond mere listening. Dive into the analytics - discover second-by-second sound volume data and explore over 500 sound categories. From the familiar hum of a distant car to the gentle rustling of leaves, unravel the auditory mosaic accompanying your sleep journey. Privacy at the Core: Your privacy is our priority. Night Hark operates entirely offline, processing all data locally on your device. Nothing is transmitted over the internet, ensuring your personal sleep data remains solely in your hands. Why Night Hark? Personalized Insights: Gain a deeper understanding of your sleep environment. Improve Sleep Quality: Identify disturbances and tailor your surroundings for better sleep.

Screenshots

Sleep Data Recorder4 screens
Night Hark4 screens

Verdict

The call

The clearest difference is in-app purchases: Night Hark at none against Sleep Data Recorder's 1. Night Hark also leads on update cadence (every 3 weeks vs every 6 weeks). Sleep Data Recorder's advantage is iOS requirement (9.0 vs 12.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sleep Data Recorder sells 1 one-off in-app purchase. Night Hark asks for nothing beyond the download.

UpkeepUpdate frequency

Sleep Data Recorder ships an update every 6 weeks, Night Hark every 3 weeks. The most recent releases landed on June 9, 2026 and May 19, 2026 respectively.

Scorecard3 real differences · 6 level
Sleep Data Recorder versus Night Hark: the parameters behind the verdict, then further details
ParameterSleep Data RecorderNight Hark
PriceFreeFree
Rating2.5 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS9.0 — better12.0
Further details — not scored
Size2 MB73 MB
Age rating4+4+
DeveloperJOHN BURKEBernhard Piskernik

In-app purchases

1 purchases

Sleep Data Recorder

One-time1
  • Weight Recorder Full Access$0.99
None

Night Hark

No in-app purchases

Questions

Is Sleep Data Recorder free?
Sleep Data Recorder is free to download, with in-app purchases available.
Is Night Hark free?
Night Hark is free to download, with no in-app purchases.
Do Sleep Data Recorder or Night Hark have ads?
Neither Sleep Data Recorder nor Night Hark shows ads.
Which is updated more often, Sleep Data Recorder or Night Hark?
Sleep Data Recorder ships an update every 6 weeks, and Night Hark every 3 weeks. Most recently, Sleep Data Recorder was updated on June 9, 2026 and Night Hark on May 19, 2026.

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