Comparison

Naptime vs NeuralStack.io™

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

Head to head
About

Naptime

This intelligent eyeshade analyzes brainwaves to enhance power naps. It plays smart music, adjusts volume, and creates a stable environment for relaxation. Wake up feeling refreshed with real-time brainwave analysis.

Highlights
  • Smart music playback based on brainwaves
  • Intelligent volume adjustment
  • Noise exclusion for a stable environment
  • Smart wake-up based on relaxation levels
  • Detailed brainwave data analysis
  • Shake-to-feedback feature
Features
Read full description

The ultimate Power Nap assistant​. An intelligent eyeshade that analyzes your brainwaves and refreshes your body and mind. Naptime is the best eyeshade for the ​nap after long-time study or work. Naptime is the best choice when you are tired on a tedious trip. 【Function description】 • Smart music play: real-time track brainwaves and play suitable music to relax you and lull you to sleep. • Smart volume control: intelligently adjust the volume according to different levels of relaxation to perfectly fit different states. • Keep you relaxed: create a stable relaxing environment by excluding external noise to maintain your relaxation. • Smart Wake-up: wake you up at the best time by real-time analysis of the brainwaves feeling relaxed and dynamic. • Detailed statistical analysis: multi-dimensional brainwave data analysis for feedback of relaxation quality to help you optimize your relaxation state. If you have trouble when using our product, please shake your phone to send us feedback.

About

NeuralStack.io™

Create personalized audio experiences for focus, sleep, and mindset enhancement. Combine brainwave entrainment, guided breathing, and ambient sounds to build custom 'Stacks'. Listen offline and alongside other apps.

Highlights
  • Customizable Stacks with multi-stage elements
  • Brainwave entrainment (0.5-100 Hz)
  • Guided breathing programs
  • Layered ambience and nature sounds
  • Offline listening
  • Integration with other apps
  • Stack playlists
Features
Read full description

Shape your mindset with customizable Brainwave Entrainment Stacks. Listen in Binaural, Monaural, Isochronic, or combined Binaural + Isochronic Tone Modes. Headphones are optional when listening to Monaural or Isochronic tones. Start with 100+ included Explore Stacks, or create your own by combining any of 300+ Multi-Stage Brainwave Entrainment programs with Guided Breathing and background audio elements into an integrated Stack. NeuralStack.io is designed for people who want more than fixed audio tracks. Instead of locking you into pre-made sessions and pre-mixed tones, NeuralStack.io provides advanced tone modulation and flexible tools to create custom soundscapes, so you can shape your ideal mindset for any situation. Includes 300+ advanced brainwave entrainment programs for focus, relaxation, stress relief, memory, insomnia relief, sleep, meditation, anxiety relief, and much more. Create custom multi-stage brainwave entrainment programs for your Stacks: * Add or remove stages, fine-tune stage durations. * Specify any beat frequency from 0.5–100 Hz. * Specify fractional frequencies with 2-decimal precision. * Choose carrier frequencies from 100–1000 Hz with automatic power equalization. * Listen in 4 Tone Modes: Binaural, Monaural, Isochronic, or phase-synchronized Binaural + Isochronic modes. * Supports Schumann Resonance frequencies (ex 7.83 Hz). Listen alongside other audio/video apps: * Set your preference to allow other apps at the app-level or the stack-level. Listen Offline: * Audio resources are synchronized to the device instead of being streamed, eliminating network traffic, saving battery life, and allowing you to listen offline. Guided Breathing: * Remix the included breathing programs to match your pace. * Create custom multi-stage breathing programs with adjustable tempo, text, and visuals. * Supports fractional breathing patterns, such as Coherent 5.5 second cycles. Advanced Global Settings * Use the app's Global Settings to modify tone characteristics, such as cycles-per-pulse and gain to sharpen or soften isochronic and monaural modulation. Stack Playlists * Organize your Stacks into playlists to support your daily routine. * Create sequences of Stacks that use different Tone Modes. Ambience and Nature * Layer dynamic ambience and nature sounds. * Remix programs, combining them to create multi-stage ambient and nature programs, and reuse them across different Stacks. Solfeggio and Schumann Frequencies * Includes single and multi-stage entrainment programs utilizing Solfeggio carrier frequencies and Schumann resonant beat frequencies to be remixed and customized. Color Noise * Layer a color noise element into your stack for sound masking and tinnitus relief. Pure Sine Waves * Create pure sine waves from 100 to 1000 Hz with power equalization and 2-decimal precision. * Remix and combine programs to create multi-stage Solfeggio progressions. Custom Audio Programs * Integrate personal audio files into your Stacks. * Note: This feature is only intended for personal audio files, such as those recorded with voice recording apps, and cannot access copy-protected audio or audio from streaming services. Subscription Required NeuralStack.io offers a free trial. Continued access to all features and content requires an auto-renewing subscription. Subscription options: $2.99/month or $24.99/year. These prices are for the United States, pricing in other countries may vary. Subscription will automatically renew unless turned off at least 24 hours before the current period ends. You can go to your App Store Account settings to manage your subscription and turn off auto-renew. Your App Store Account will be charged when the purchase is confirmed. If you subscribe before your free trial ends, the rest of your free trial period will be forfeited as soon as your purchase is confirmed. Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy https://neuralstack.io/#privacy

Screenshots

Naptime4 screens
NeuralStack.io™4 screens

Verdict

The call

The clearest difference is review sentiment: NeuralStack.io™ at 100% against Naptime's 0%. NeuralStack.io™ also leads on rating (5.0 vs 2.0). Naptime's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 15.0). On price, ratings volume, update cadence and ads 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. NeuralStack.io™ sells 2 in-app purchases, starting at $2.99 per month. Naptime asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NeuralStack.io™ holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 8 and 9 respectively. Written reviews point the same way: 0% of Naptime's written reviews are positive against 100% of NeuralStack.io™'s.

UpkeepUpdate frequency

Naptime ships an update every 2 weeks, NeuralStack.io™ every 3 weeks. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Naptime versus NeuralStack.io™: the parameters behind the verdict, then further details
ParameterNaptimeNeuralStack.io™
PriceFreeFree
Rating2.0 (8 ratings)5.0 (9 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings89 — better
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size101 MB179 MB
Age rating4+4+
Developer杭州回车电子科技有限公司Banzai Labs

Customer experience

Naptime

All ratings8 ratings
Positive12.5%
Neutral25.0%
Negative62.5%
Written reviews6 reviews
Positive0.0%
Neutral16.7%
Negative83.3%

NeuralStack.io™

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Naptime

No in-app purchases

2 purchases

NeuralStack.io™

Subscriptions2
  • NeuralStack.io Monthly Subscription14 Days trial$2.991 Month
  • NeuralStack.io Annual Subscription14 Days trial$24.991 Year

Questions

Is Naptime free?
Naptime is free to download, with no in-app purchases.
Is NeuralStack.io™ free?
NeuralStack.io™ is free to download, with in-app purchases available.
Which has better reviews, Naptime or NeuralStack.io™?
NeuralStack.io™ is rated higher. Naptime averages 2.0 out of 5 from 8 ratings, while NeuralStack.io™ averages 5.0 from 9 ratings.
Do Naptime or NeuralStack.io™ have ads?
Neither Naptime nor NeuralStack.io™ shows ads.
Which is updated more often, Naptime or NeuralStack.io™?
Naptime ships an update every 2 weeks, and NeuralStack.io™ every 3 weeks. Most recently, Naptime was updated on October 9, 2026 and NeuralStack.io™ on October 24, 2026.

Other comparisons