Comparison

Night Hark vs Longevity Arc

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

Head to head
About

Night Hark

Features
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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 โ€” from soothing ambient sounds to unexpected noises and snoring. ADVANCED SLEEP SOUND ANALYTICS โ€ข Second-by-Second Analytics: Track volume level changes and decibel variations throughout the night. โ€ข 500+ Sound Categories: Identify sleep noise patterns including ambient hums, rustling, snore sounds, and environment changes. โ€ข 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? โ€ข Improve Sleep Quality: Identify environmental noise triggers interrupting your rest. โ€ข Snore & Noise Monitor: Track nighttime disturbances with precision. โ€ข Privacy-Focused: No cloud uploads, no account required. Download Night Hark today and discover the soundscape of your sleep!

About

Longevity Arc

Features
Read full description

Longevity Arc turns your Apple Health data into five clear longevity signals. Instead of digging through scattered charts, you can see HRV, fitness, sleep, gait, and cardiac load together in one simple dashboard designed to help you understand how your body is trending over time. Built for people who care about healthspan, recovery, and long-term performance, Longevity Arc helps you spot changes faster and focus on the metrics that matter most. The app is designed to feel simple at a glance while still giving you useful depth when you want to explore trends and patterns. What you can do in Longevity Arc: - Track five science-inspired longevity signals from Apple Health in one place. - Review your HRV, sleep, fitness, gait, and cardiac-load trends without jumping between different screens. - Get a clearer picture of how daily habits may affect your long-term trajectory. - Use a private, HealthKit-powered experience built around your own data. Why people use Longevity Arc: - Apple Health already contains valuable signals, but they are often fragmented and hard to interpret quickly. - Longevity Arc brings those signals together into a more readable view so you can check your status in seconds. - The focus is not noise or endless scores - it is a cleaner way to monitor meaningful change over time. Privacy and data: - Longevity Arc works with your Apple Health data. - You stay focused on your own signals, trends, and progress. Ideal for: - Biohackers tracking recovery and resilience. - Health-conscious users who want a simpler Apple Health dashboard. - Founders, athletes, and everyday users trying to balance stress, fitness, and sleep over time. Privacy Policy: https://longevityarc.app/privacy Terms of Use: https://longevityarc.app/terms

Screenshots

Night Hark4 screens
Longevity Arc4 screens

Verdict

The call

The clearest difference is in-app purchases: Night Hark at none against Longevity Arc's 2. Longevity Arc's advantage is update cadence (every 3 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Longevity Arc sells 2 in-app purchases, starting at $2.99 per month. Night Hark asks for nothing beyond the download.

UpkeepUpdate frequency

Night Hark ships an update monthly, Longevity Arc every 3 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

Scorecard2 real differences ยท 4 level
Night Hark versus Longevity Arc: the parameters behind the verdict, then further details
ParameterNight HarkLongevity Arc
PriceFreeFree
Update frequencyMonthlyEvery 3 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPod, Apple Watch
Requires iOS15.0 โ€” better15.1
Further details โ€” not scored
Size89 MB40 MB
Age rating4+4+
DeveloperBernhard PiskernikRadoslaw Jozefowicz

In-app purchases

None

Night Hark

No in-app purchases

2 purchases

Longevity Arc

Subscriptions1
  • Monthly Pro3 Days trial$2.991 Month
One-time1
  • Lifetime Pro$9.99

Questions

Is Night Hark free?
Night Hark is free to download, with no in-app purchases.
Is Longevity Arc free?
Longevity Arc is free to download, with in-app purchases available.
Do Night Hark or Longevity Arc have ads?
Neither Night Hark nor Longevity Arc shows ads.
Which is updated more often, Night Hark or Longevity Arc?
Night Hark ships an update monthly, and Longevity Arc every 3 days. Most recently, Night Hark was updated on October 16, 2026 and Longevity Arc on October 7, 2026.

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