Comparison

Noise Machine vs ASPIRE Study

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

Head to head
About

Noise Machine

Drift off to sleep, enhance focus, or simply relax with a variety of scientifically accurate noise types. This app offers brown, green, pink, and white noise, along with a sleep timer and the ability to mix sounds. Control playback with Siri and enjoy a beautiful, dark mode interface.

Highlights
  • High-quality noise generation
  • Integrated sleep timer
  • Mix noise with other app audio
  • Siri integration for playback control
  • Relaxing dark mode
  • Play on various audio devices
Features
Read full description

Fall asleep easily, focus, or relax with brown noise, green noise, pink noise, and white noise, plus an integrated sleep timer. Features: * High-quality white noise, pink noise, green noise, and brown noise * Integrated Sleep Timer that fades out noise after a set time * Mix noise with the audio from other apps * Play on speakers, AirPods, or HomePod * Control from the lock screen * Relaxing Dark Mode * Ask Siri to "Play Noise Machine” or to play a specific noise Noise Machine is the best noise maker app! The beautiful design of this white noise maker app is a joy to use each night. Noise Machine features four “colors” of noise - each with different properties: • Brown Noise (also known as Red Noise) has a rich, deeper character with strong low frequencies and roars like a river or an ocean. Brown noise is beneficial for sleep, and even more effective when played through a powerful speaker to bring out its deep tones. Our brown noise is mathematically accurate, representing the true nature of brown noise. • Green Noise has an ambient and natural feel that gives the feeling of being in a forest or river valley. Green noise is energizing like a long walk in the woods. • Pink Noise has a more balanced texture that highlights the middle frequencies evenly, like a calming rain storm. Our pink noise is mathematically balanced. • White Noise is pure and flat with an equal balance of low, medium, and high-frequency sound. White noise may sound like a waterfall cascading down a rocky cliff. Our white noise is mathematically accurate, representing true white noise. Noise Machine now works with Siri. Say “Hey Siri, play Noise Machine” to pick right up where you left off with your favorite noise. You can also say: “Hey Siri, play brown noise on Noise Machine.” Are you often distracted by irritating sounds when trying to sleep at night, like city noise, loud traffic, the fan ticking, the neighbor’s music, or a partner snoring? Put on your sleep noise using this app, and you will soon find that distractions are no longer bothering you. You will also notice that this noise has a calming effect that helps you relax and drift off to sleep naturally. Once you have connected with the benefits of these sleep sounds, it may profoundly change the way you sleep. These noises are also very effective in focusing the mind on office work, study, or thought in distracting environments. By replacing the base volume of the background noise in the environment around you with random white noise, pink noise, or brown noise, the distracting sounds are drowned out, leaving you a soothing virtual silence. The noise-canceling sounds replace the background noise. The calming effect of the noise helps focus the mind on the task at hand, facilitating clarity and productivity. The audio from this app works great when played directly from your iPhone or iPad speaker and can also connect to headphones, AirPods, a Bluetooth speaker, HomePod, or other audio device for a louder and deeper bath of calming noise. Why buy a portable noise maker or sound machine when you can use the devices you already own! Noise Machine features a sleep timer to automatically turn off noise at night after a set time. Some people like to fall asleep by relaxing with noise, but find that they prefer the noise to fade out during sleep. Set a sleep timer to your desired time, and the noise will fade out very slowly. People use Noise Machine to: • fall asleep faster • block out distracting sounds • provide a source of background noise • increase focus and concentration • help with work and study • relax and reduce stress • increase privacy in the home or office • quiet your mind • alleviate tinnitus • calm infants, toddlers, children, and babies • drown out a snoring partner Privacy Policy: https://zipoapps.com/noisemachineios/privacy/ Terms and Conditions: https://zipoapps.com/noisemachineios/terms/

About

ASPIRE Study

Features
Read full description

The ASPIRE mobile application is an invite-only digital health companion specifically designed for first-time mothers participating in the multi-site, longitudinal, observational cohort study: ASPIRE: Advancing Stillbirth Prevention through Innovative Risk Evaluation. Funded via the Wellcome Leap InUtero programme and managed in collaboration with Medicines360, Precia, and Daiser, the ASPIRE app serves as a vital component to explore digital phenotyping. By collecting real-world contextual metrics alongside standard clinical care, the study seeks to build advanced predictive tools that can help identify signs of pregnancy complications—such as pre-eclampsia (PE), fetal growth restriction (FGR), and gestational diabetes mellitus (GDM)—earlier than traditional methods. Key App Features & Functionality • Secure & Simplified Task Management: A minimal, at-a-glance homepage dashboard that keeps your required pregnancy check-ins on track. Participants can see upcoming tasks and completion status, while raw health values remain hidden to support emotional safety and reassure you. • Validated Patient Reported Outcomes (ePROs): Periodically batch-complete brief, clinically validated surveys tracking physical symptoms, lifestyle habits, and maternal wellbeing. Check-ins occur on several occasions during pregnancy and postpartum, taking only 10–15 minutes per batch. • Seamless Connected Health Syncing: Secure integration with smart wearables (such as the Oura Ring) or your phone's native health environment (Apple Health / Google Fit) to log continuous physiological metrics like sleep cycles, heart rate variability, and movement without extra effort. • Comprehensive Verified Resource Hub: Immediate in-app access to a medically vetted Frequently Asked Questions (FAQ) library detailing the research protocols, data privacy safeguards, and step-by-step app support workflows. Strict Data Privacy & Research Security Your data is safe, private, and treated with strict protocol compliance. The ASPIRE app maps all logged data directly to a unique Participant ID (PID)—never storing patient-identifiable information on application servers. All information is encrypted, and safely stored by the clinical study team. Disclaimer: This app is for clinical research purposes only and does not provide medical care, diagnoses, or urgent symptom interpretation. Clinical decisions remain dictated strictly by your routine doctor or midwife care team.

Screenshots

Noise Machine4 screens
ASPIRE Study4 screens

Verdict

The call

The clearest difference is in-app purchases: ASPIRE Study at none against Noise Machine's 10. ASPIRE Study also leads on ads (none vs shown) and iOS requirement (14.0 vs 16.0). On price, update cadence 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. Noise Machine sells 10 in-app purchases, starting at $0.99 per 7 days. ASPIRE Study asks for nothing beyond the download.

UpkeepUpdate frequency

Noise Machine ships an update every 3 weeks, ASPIRE Study monthly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Noise Machine versus ASPIRE Study: the parameters behind the verdict, then further details
ParameterNoise MachineASPIRE Study
PriceFreeFree
Rating4.6 (4.3K ratings) — better—
Positive reviews65.6% of reviews—
Number of ratings4.3K — better—
Update frequencyEvery 3 weeks — betterMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.014.0 — better
Further details — not scored
Size119 MB73 MB
Age rating4+17+
DeveloperZipoAppsDaiser Ltd

Bugs and requests

Noise Machine

Reported bugs

2 issues
  • App crashes or stops playing randomly
  • Skipping or looping issues with sound

Requested features

4 requests
  • More sound options (purple, blue noise)
  • Ability to mix/layer sounds
  • Longer timer options (e.g. 30 mins)
  • Ability to cast to other devices

ASPIRE Study

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Noise Machine

Subscriptions7
  • Unlimited Access3 Days trial$0.997 Days
  • Unlimited Access3 Days trial$8.997 Days
  • Unlimited Noise Subscription$9.991 Year
Show 4 more
  • Unlimited Noise$12.991 Year
  • Unlimited Noise$14.991 Year
  • Unlimited Noise$19.991 Year
  • Full Access3 Days trial$19.991 Month
One-time3
  • Noise Machine Lifetime Unlock$0.99
  • Noise Machine Lifetime Unlock$6.99
  • Noise Machine Lifetime Unlock$9.99
None

ASPIRE Study

No in-app purchases

Questions

Is Noise Machine free?
Noise Machine is free to download, with in-app purchases available.
Is ASPIRE Study free?
ASPIRE Study is free to download, with no in-app purchases.
Do Noise Machine or ASPIRE Study have ads?
Noise Machine shows ads; ASPIRE Study does not.
Which is updated more often, Noise Machine or ASPIRE Study?
Noise Machine ships an update every 3 weeks, and ASPIRE Study monthly. Most recently, Noise Machine was updated on November 2, 2026 and ASPIRE Study on October 31, 2026.

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