Comparison

Softy Sleep vs Slo

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

Head to head
About

Softy Sleep

Drift off faster with a library of calming sounds like rain and brown noise. Mix and match to create your perfect sleep environment. Track your sleep stages and earn rewards to customize your virtual bedroom.

Highlights
  • Curated library of calming sounds
  • Mix and match sounds
  • Sleep tracking with Apple Watch/iPhone
  • Earn rewards for sleep
  • Set personalized sleep goals
  • AI-powered sound suggestions
  • Jet lag recovery programs
Features
Read full description

Struggling to fall asleep? Softy Sleep helps you drift off faster with a curated library of calming sounds — rain, fan, brown noise, ocean waves, and more. MIX & MATCH SOUNDS Blend your favorite sounds together to create the perfect sleep environment. Save your mixes and replay them every night with one tap. TRACK YOUR SLEEP Connect your Apple Watch or use your iPhone to monitor your sleep stages, duration, and quality. Get personalized sound recommendations based on how you actually sleep. EARN REWARDS WHILE YOU SLEEP The better you sleep, the more points you earn. Spend them to customize your bedroom — new beds, walls, lamps, and decor. Build the sleep sanctuary you deserve. SET YOUR SLEEP GOALS Choose what matters to you — fall asleep faster, sleep deeper, reduce stress, or improve overall sleep quality. Softy Sleep adapts to help you get there. AI-POWERED SUGGESTIONS Smart recommendations learn your habits, time of day, and preferences to suggest the right sounds at the right time — no scrolling required. JET LAG RECOVERY Traveling across time zones? Use built-in recovery programs designed to help your body adjust faster, whether you're heading east or west. WHAT'S INCLUDED FREE • Calming sounds including rain, fan, and brown noise • Mix up to 2 sounds together • Sleep timer with fade-out • Sleep goal tracking • Daily recommendations SOFTY SLEEP PREMIUM • 50+ exclusive soundscapes, binaural beats & classical audio • Unlimited sound mixing & saved favorites • Advanced sleep analytics • AI-powered personalized suggestions • Jet lag recovery programs Download Softy Sleep and start sleeping better tonight. Privacy Policy: https://www.termsfeed.com/live/12a0b00b-7e47-4bb1-b5a3-3ae1a1f96bb0 Terms of Usage: https://www.apple.com/legal/internet-services/itunes/

About

Slo

This app offers a variety of scientifically proven sleep sounds, including brown, white, and pink noise, as well as nature sounds like rain and ocean waves. It helps users fall asleep faster, improve focus, reduce stress, and aid meditation with its high-quality audio and customizable features.

Highlights
  • Brown, white, and pink noise options
  • Nature sounds (rain, ocean waves)
  • Timer functionality
  • Mix multiple sounds
  • Offline playback
  • Improve sleep quality
  • Boost focus and concentration
Read full description

Slo is a brown noise and sleep sounds app for iPhone, iPad, and Mac, with 150+ curated sounds for sleep, focus, and relaxation. Play deep brown noise on its own, or mix it with rain, waves, and fan sounds — each layer with its own volume — and set a sleep timer that stops playback automatically. KEY FEATURES • Brown noise – deep, low-frequency rumble many people choose for focus and sleep • White, pink & green noise – broadband noise colors for masking background sound • Binaural beats & frequencies – binaural beats, solfeggio tones (396–963 Hz, including 432 Hz and 528 Hz) and Schumann resonance tones • Rain sounds – steady rainfall and distant thunderstorms • Waves & water – ocean waves, river, waterfall • Fan sounds – ceiling fan, table fan, airplane cabin • Nature & ambience – forest, birds, wind, fireplace, campfire, train • Sound mixing – layer sounds, each with its own volume control • Sleep timer – playback stops on its own after you drift off MADE FOR • Light sleepers who use steady sound to mask traffic, neighbors, or a snoring partner • Students and deep workers who keep brown noise or fan noise running for hours • People who wind down to binaural beats, solfeggio tones, or steady frequencies • People who use sound masking at night to make tinnitus ringing less noticeable • Anyone building a consistent wind-down routine — same mix, same timer, every night WHY SLO? A focused sound machine, not a content platform: 150+ curated sounds, a mixer with per-layer volume, and a sleep timer. No voices, no playlists — steady sound that sits in the background while you sleep, study, or work. Slo is free to download and try; the full sound library is a premium purchase inside the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://meltedbutter.co/terms/noise.html Privacy Policy: https://meltedbutter.co/privacy/noise.html FREQUENTLY ASKED QUESTIONS What is the best app for brown noise? Slo is built around brown noise: play it on its own, or layer it under rain or a fan sound with a separate volume for each layer, and set a timer so it stops on its own. Does brown noise help you sleep? Brown noise doesn't treat anything — what it does is mask. A steady low-frequency sound covers unpredictable noise like traffic, doors, and snoring, which is why many light sleepers keep it running at night. Can I use Slo for tinnitus? Steady broadband sounds like brown and pink noise can help mask tinnitus ringing — many people set a low volume that makes the ringing less noticeable at night. Slo is a sound player, not a treatment; persistent or one-sided tinnitus needs a medical assessment. What are solfeggio frequencies and binaural beats? Slo includes solfeggio tones (396–963 Hz, with 432 Hz and 528 Hz), Schumann resonance tones, and binaural beats — steady tones many people play for meditation and winding down. Try one with headphones and keep it if you like it. What's the difference between brown, white, pink and green noise? White noise spreads energy evenly across all frequencies (like static). Pink noise shifts energy toward lower frequencies (like steady rain). Green noise centers on the middle of the spectrum. Brown noise goes deepest — a low rumble like a waterfall or strong wind. Slo includes all of them, so try each and keep what suits you. Can I use it for studying and focus? Yes. Many users prefer brown noise or fan noise as a steady background for studying and deep work, because a constant sound gives the ear nothing new to chase. Can I mix multiple sounds together? Yes. Layer brown noise with rain, add thunder over a fan, and set each sound's volume separately to build your own soundscape. Does Slo have a sleep timer? Yes. Set the timer when you press play and playback stops automatically. Is Slo free? Slo is free to download and try; the full 150+ sound library is a premium purchase inside the app.

Screenshots

Softy Sleep4 screens
Slo3 screens

Verdict

The call

The clearest difference is ads: Softy Sleep at none against Slo's shown. Slo's advantage is update cadence (every 2 days vs fortnightly) and ratings volume (63 vs 8). On price, rating, review sentiment and in-app purchases 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. Softy Sleep sells 8 in-app purchases, starting at $3.99 per 7 days and Slo sells 4 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Softy Sleep against 4.9 for Slo. That said, the two scores are not equally well evidenced: Slo has 63 ratings behind it against 8, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Softy Sleep ships an update fortnightly, Slo every 2 days. The most recent releases landed on June 4, 2026 and September 15, 2026 respectively.

Scorecard4 real differences · 6 level
Softy Sleep versus Slo: the parameters behind the verdict, then further details
ParameterSofty SleepSlo
PriceFreeFree
Rating4.8 (8 ratings)4.9 (63 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings863 — better
Update frequencyFortnightlyEvery 2 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.615.6 — better
Further details — not scored
Size185 MB72 MB
Age rating4+4+
DeveloperOGUZCAN BESERIKLIKARLIE ALEXIS KOWALSKA

Customer experience

Softy Sleep

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Slo

All ratings63 ratings
Positive98.4%
Neutral1.6%
Negative0.0%
Written reviews24 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

8 purchases

Softy Sleep

Subscriptions4
  • Weekly3 Days trial$3.997 Days
  • Premium$3.997 Days
  • Premium3 Days trial$8.991 Year
Show 1 more
  • Premium$9.991 Month
One-time4
  • PremiumFree
  • Small Package$4.99
  • Large Package$7.49
Show 1 more
  • SoftySleep Lifetime$24.99
4 purchases

Slo

Subscriptions2
  • Monthly Premium$5.991 Month
  • Yearly Access7 Days trial$29.991 Year
One-time2
  • Lifetime Access$24.99
  • Lifetime Access$49.99

Questions

Is Softy Sleep free?
Softy Sleep is free to download, with in-app purchases available.
Is Slo free?
Slo is free to download, with in-app purchases available.
Which has better reviews, Softy Sleep or Slo?
Slo is rated higher. Softy Sleep averages 4.8 out of 5 from 8 ratings, while Slo averages 4.9 from 63 ratings.
Do Softy Sleep or Slo have ads?
Slo shows ads; Softy Sleep does not.
Which is updated more often, Softy Sleep or Slo?
Softy Sleep ships an update fortnightly, and Slo every 2 days. Most recently, Softy Sleep was updated on June 4, 2026 and Slo on September 15, 2026.

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