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

Ever wondered about the sounds accompanying your sleep? Night Hark is your private, offline sleep sound tracker and ambient noise analyzer. Discover night noise, record sleep audio, and gain deep insights into your sleep environment. LISTEN & EXPLORE Night Hark records and analyzes nighttime ambient sounds while you sleep. Listen back to your nocturnal soundscape — from soothing ambient sounds to unexpected noises and snoring. ADVANCED SLEEP SOUND ANALYTICS • Second-by-Second Analytics: Track volume level changes and decibel variations throughout the night. • 500+ Sound Categories: Identify sleep noise patterns including ambient hums, rustling, snore sounds, and environment changes. • Detailed Sleep Visualizations: View intuitive audio charts to pinpoint noise disturbances. 100% OFFLINE & PRIVATE Your privacy comes first. Night Hark works completely offline and processes all audio data locally on your device. Zero internet transmission means your private sleep recordings never leave your phone. WHY CHOOSE NIGHT HARK? • Improve Sleep Quality: Identify environmental noise triggers interrupting your rest. • Snore & Noise Monitor: Track nighttime disturbances with precision. • Privacy-Focused: No cloud uploads, no account required. Download Night Hark today and discover the soundscape of your 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 15.0). 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 November 2, 2026 and October 30, 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 — better15.0
Further details — not scored
Size2 MB90 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 November 2, 2026 and Night Hark on October 30, 2026.

Other comparisons