Comparison

Sleep Effect vs noiss

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

Head to head
About

Sleep Effect

Features
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SLEEP EFFECT: YOUR ARCHITECT OF CALM. Stop fighting the silence. Whether you’re battling a racing mind, a noisy neighborhood, or the hum of tinnitus, Sleep Effect empowers you to build a personalized audio sanctuary. Using a state-of-the-art layering engine, we don't just play sounds—we help you conduct your environment. WHY SLEEP EFFECT? Unlike standard sound machines that play repetitive loops, Sleep Effect uses an organic replay engine. By introducing natural delays between sounds, we eliminate "loop fatigue," creating an unpredictable, immersive atmosphere that feels like the real world. THE CORE FEATURES: 1. AN INFINITE LIBRARY OF HIGH-FIDELITY AUDIO Curated by sound enthusiasts, our library is immersive and categorized for effortless discovery: * WATER & RAIN: Thunderstorms, mountain streams, and the ocean pulse. * THE GREAT OUTDOORS: Rustling leaves, meadow breezes, and forest nights. * WILDERNESS ECHOES: Haunting loon calls, distant gulls, and midnight owls. * COZY ELEMENTS: Crackling log fires and wind-swept cabins. * AIR & SPACE: Mountain gusts and soft drones to clear mental clutter. 2. THE CUSTOM MIX ARCHITECT Don’t just listen—create. Layer unlimited sounds simultaneously with precision control: * INDIVIDUAL VOLUME SLIDERS: Make the rain heavy, but the distant thunder faint. * NAMED FAVORITES: Save your "Rainy Cabin" mix with custom emojis for one-tap relaxation. 3. PRECISION CONTROLS & SLEEP TIMER * GENTLE FADE-OUT: Set your timer and drift off as the audio gracefully fades to silence. * MASTER PLAYER: A polished, tactile interface to pause or stop all sounds instantly. 4. ORGANIC REPLAY DELAYS Our "Natural Replay" feature allows you to add manual delays between tracks. This ensures your environment stays fresh and organic, preventing your brain from spotting a loop. DESIGNED FOR YOUR BEDSIDE: * OBSIDIAN DARK MODE: Designed to reduce eye strain and keep your room dark. * LOCK SCREEN CONTROL: Full artwork and media controls without unlocking your phone. * BACKGROUND PLAY: Keep your soundscape running while using other apps. PERFECT FOR: * DEEP SLEEP: Mask tinnitus and silence racing thoughts. * PARENTS: Create a consistent, soothing environment for babies. * DEEP WORK: Block out office distractions and reach a flow state. * MEDITATION: Ground your practice with high-fidelity nature. Transform your space. Find your frequency. Download Sleep Effect today.

About

noiss

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noiss is a background sound app for focusing, relaxing, sleeping, and recharging— lightweight and offline on your iPhone. What sets it apart is what it *doesn't* do: it doesn't promise to transform your brain. Most apps in this category sell a "magic switch" for your state of mind. Research suggests otherwise: the effects exist, but they are subtle and depend on the listener and the context. Noise helps those with ADHD but might distract those without it. Binaural beats rely on unproven mechanisms. Nature sounds have the strongest scientific backing. Instead of hiding this, noiss puts it front and center. Each sound carries an evidence-strength label—Good, Mixed, Weak, or No Evidence—along with an honest note and a citation of the study. You decide what works for you. SOUNDS • Real-time synthesized white, pink, and brown noise—infinite, file-free, and without that audible glitch when the loop restarts. • Binaural beats, presented with explicit skepticism. • Nature loops based on real field recordings: rain, streams, forests, and birds, featuring various locations from around the world. ORGANIZED BY STATE OF MIND • Focus—background sound for your next hour of work. • Relax—slow down with the sounds that have the strongest scientific backing. • Sleep—environmental masking, not a magic sleep button. • Energy—little evidence exists here. And it’s okay to admit that. CALM TOOLS • Layered mixer: combine rain and pink noise to find your own version of silence, with independent volume control for each layer. • Save your combinations as presets. • Focus session (Pomodoro) featuring work blocks, breaks, and an optional journal. The timer never alters the sound—you remain in full control of the audio. • Sleep timer with a gentle fade-out during the final seconds—the sound drifts away rather than cutting off abruptly. • Gentle alert when the volume has been too high for too long. BUILT FOR IPHONE • Live Activity on the Dynamic Island and Lock Screen: track your focus session without opening the app. Displays only time and progress—never audio controls. • Audio continues playing in the background and appears in Control Center, using your standard media controls. • Picks up right where you left off. HONEST INSIDE AND OUT • Truly free: the entire catalog, mixer, presets, and timers—no paywalls, no subscriptions, no hidden purchases. • Offline: works without an internet connection. • No ads, no tracking. Nothing you do leaves your device. No gamification, streaks, or notifications designed to pull you back in. noiss doesn't fight for your attention—it exists to stay out of your way. Japandi design: warm paper textures, earthy tones, and plenty of white space. The interface is part of the relaxation experience. No single sound is magic. Give it a try and see what works for you.

Screenshots

Sleep Effect4 screens
noiss4 screens

Verdict

The call

The clearest difference is iOS requirement: noiss at 18.0 against Sleep Effect's 26.1. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 5 level
Sleep Effect versus noiss: the parameters behind the verdict, then further details
ParameterSleep Effectnoiss
PriceFreeFree
Update frequencyFortnightly—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, Mac
Requires iOS26.118.0 — better
Further details — not scored
Size324 MB59 MB
Age rating4+4+
DeveloperAhmed NabulsiIgor Gottschalg Duarte

In-app purchases

None

Sleep Effect

No in-app purchases

None

noiss

No in-app purchases

Questions

Is Sleep Effect free?
Sleep Effect is free to download, with no in-app purchases.
Is noiss free?
noiss is free to download, with no in-app purchases.
Do Sleep Effect or noiss have ads?
Neither Sleep Effect nor noiss shows ads.

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