Comparison

Ambi vs Sleep Noise Machine

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

Head to head
About

Ambi

This app generates unique, ever-changing soundscapes to help you relax and focus. It masks distracting background noise with customizable mixes of various noise types, offering manual control over the sound or automatic randomization. Enhance your audio experience with reverb and an equalizer.

Highlights
  • Algorithmic noise generation
  • Customizable noise mixes
  • Manual and automatic sound randomization
  • Reverb effect
  • 8-band graphic equalizer
  • In-app timer (paid)
  • User preset saving (paid)
Read full description

Ambi generates calm soundscapes in real time — not from recorded loops. White, pink, brown, and water noise are synthesized live, so the sound never repeats and never seams. Drag the orb to blend all four sources, fine-tune with an 8-band EQ, and add reverb and motion until it feels right. BUILT FOR REAL LIFE Pick your use case on first launch — Sleep, Focus, Study, Baby, or Tinnitus — and Ambi loads a starter preset with a suggested timer. Seven beautiful presets are included; switch freely and explore. FREE TO PLAY • Play, mix, and explore all default presets • Blend four live noise generators with the orb • 8-band EQ, reverb, and motion • Set a sleep timer (hours, minutes, seconds) PREMIUM — ONE-TIME UNLOCK • Start the sleep timer • Background play and lock screen controls • Save, create, and manage custom presets • Siri, Shortcuts, and Control Center WHY AMBI? Most sound apps loop short recordings. Ambi uses algorithmic noise generation — smaller download, infinite variation, and a mix that responds to you in real time. Whether you need brown noise for deep focus, pink noise for baby sleep, white noise for study, or gentle water for tinnitus relief, Ambi is a simple, beautiful sound machine in your pocket. No subscription. No ads. Just calm.

About

Sleep Noise Machine

Generate high-quality white, pink, brown, and black noise with advanced audio customization. Create the ideal sound environment for sleep, focus, or masking distractions with real-time adjustments and a user-friendly interface.

Highlights
  • High-quality white, pink, brown, black noise
  • 10-band graphic equalizer
  • Adjustable high-pass and low-pass filters
  • Real-time audio spectrum visualization
  • Timer with auto-stop and fade out
  • Ear fatigue reduction methods
  • Customizable user presets
Features
Read full description

A sophisticated white, pink, brown, and black noise generator with advanced audio customisation features. This app helps create the perfect sound environment for deep sleep, concentration, relaxation, or simply masking unwanted background noise. Now features green noise using black noise sound source and the new green noise EQ preset. Features: - Four high-quality noise types: White, Pink, Brown, and Black noise generated using advanced DSP algorithms for the higest quality - Professional-grade 10-band equaliser with customisable frequency adjustments - High-fidelity audio processing with oversampling technology and multiple biquads for superior sound quality - Black noise with a custom preset will give you the deepest sleep ever - Adjustable high-pass and low-pass filters with multiple slopes - Real-time audio spectrum visualisation with line and bar graph modes - Timer function with auto-stop capability and slow fade out - Sound changes and updates in real time as you move EQ and filter faders! - utilises advanced ear fatigue reduction methods such as gentle filter modulation, stereo processing and micro changes in dynamics making long hours of listening pleasant - Smooth crossfading between different noise types when switching for a peaceful transition - Airplay mode support - Bluetooth output support - Airpods output support - 25+ built-in audio presets for various environments and use cases - Very efficient engine enables the highest quality sounds and effects while saving on battery use - Custom user presets that can be saved and recalled - Sleek, intuitive interface with professional controls - Background audio playback support Studies show that noise can be used to help ADHD sufferers by providing consistent, non-distracting background sound. For tinnitus sufferers, the customisable frequency controls allow precise masking of troublesome frequencies, potentially providing relief from persistent ringing. The app is fully functional without subscription and you are welcome to use it as much as you like. However, if you want to enjoy the app with an unlimited timer then you can purchase a premium subscription. If you purchase a monthly or yearly subscription, payment will be charged to your iTunes account. Your account will automatically be charged for renewal within 24-hours prior to the end of the current subscription unless you disable auto-renew. You can manage your subscriptions and turn off auto-renewal by going to your account settings on the App Store after purchase. When canceling a subscription, your subscription will stay active until the end of the current period. Auto-renewal will be disabled, but the current subscription will not be refunded. End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Ambi4 screens
Sleep Noise Machine4 screens

Verdict

The call

The clearest difference is ads: Sleep Noise Machine at none against Ambi's shown. Sleep Noise Machine also leads on update cadence (every 4 days vs every 4 months) and rating (4.6 vs 4.3). Ambi's advantage is review sentiment (58% vs 33%). On price, ratings volume, in-app purchases and monetization model 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. Ambi sells 1 one-off in-app purchase and Sleep Noise Machine sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleep Noise Machine holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 87 and 152 respectively. Written reviews complicate that: 58% of Ambi's written reviews are positive against 33% of Sleep Noise Machine's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Ambi ships an update every 4 months, Sleep Noise Machine every 4 days. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Ambi versus Sleep Noise Machine: the parameters behind the verdict, then further details
ParameterAmbiSleep Noise Machine
PriceFreeFree
Rating4.3 (87 ratings)4.6 (152 ratings) — better
Positive reviews58.1% of reviews — better33.3% of reviews
Number of ratings87152 — better
Update frequencyEvery 4 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.012.0 — better
Further details — not scored
Size9 MB41 MB
Age rating4+4+
DeveloperMellowmuse LtdSimon Burgess

Customer experience

Ambi

All ratings87 ratings
Positive81.6%
Neutral6.9%
Negative11.5%
Written reviews31 reviews
Positive58.1%
Neutral9.7%
Negative32.3%

Sleep Noise Machine

All ratings139 ratings
Positive89.9%
Neutral2.9%
Negative7.2%
Written reviews6 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

1 purchases

Ambi

One-time1
  • Ambi Pro$4.99
4 purchases

Sleep Noise Machine

Subscriptions3
  • Premium Monthly$2.991 Month
  • Premium Weekly With Trial3 Days trial$3.997 Days
  • Premium Annual$19.991 Year
One-time1
  • Premium Lifetime$19.99

Questions

Is Ambi free?
Ambi is free to download, with in-app purchases available.
Is Sleep Noise Machine free?
Sleep Noise Machine is free to download, with in-app purchases available.
Which has better reviews, Ambi or Sleep Noise Machine?
Sleep Noise Machine is rated higher. Ambi averages 4.3 out of 5 from 87 ratings, while Sleep Noise Machine averages 4.6 from 152 ratings.
Do Ambi or Sleep Noise Machine have ads?
Ambi shows ads; Sleep Noise Machine does not.
Which is updated more often, Ambi or Sleep Noise Machine?
Ambi ships an update every 4 months, and Sleep Noise Machine every 4 days. Most recently, Ambi was updated on November 1, 2026 and Sleep Noise Machine on October 24, 2026.

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