ChillDay vs DimDim zZ
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
ChillDay
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DimDim zZ
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DimDim is a minimalist sleep sound app for nights when falling asleep feels hard. No complicated setup β just one sound ticket that carries you off to sleep tonight. β A guided journey into sleep DimDim is designed around three natural stages of falling asleep. Β· Wind-down β The first 15 minutes to settle your mind Β· Drift β The next 30 minutes as consciousness fades Β· Deep β Sustained sleep through the rest of the night Each stage shifts to the right frequency automatically, following the natural flow of sleep. β A range of frequencies Β· Brainwave bands: Delta (deep sleep), Theta (light sleep), Alpha (relaxation) Β· Solfeggio tones: 174Hz, 396Hz, 528Hz, 639Hz, 852Hz Β· Natural tuning: 432Hz, 7.83Hz (Schumann resonance) Β· Noise: White, Pink, Brown β Soothing companion sounds Pair any frequency with a gentle sound that fades out naturally over 30 minutes. Β· Nature: Rain, ocean, stream, fireplace, birds Β· Cosmic & mechanical: Space, submarine, airplane, fan Β· ASMR: Pencil writing, page turning Β· Meditation: Heart Sutra, Tibetan bowls, wind chimes β Your own presets Save your favorite combinations and start them again with a single tap. β Gentle alarms Wake up to soft chimes, birdsong, or a temple bell β never a jarring sound. β Baby Mode (for caregivers) A safe mode for parents and caregivers to help infants sleep. Curated with sounds that are gentle on developing ears β white, pink, brown noise, lullabies, and womb sounds. β Simple by design Β· No sign-up, no account, no clutter Β· All data stays on your device Β· Start using it the moment you open it β Notes DimDim is not a medical device and is not intended to diagnose, treat, or prevent any condition. The effects of frequencies are not medically established and may offer subjective relaxation only. If you suspect a sleep disorder, please consult a healthcare professional. Do not use while driving or operating machinery. Listen at moderate volumes. Infant auditory systems are highly sensitive β when using Baby Mode, place the device at least 2 meters (7 feet) away and keep volume below 50 dB. Music attribution: Yongbae Kim, courtesy of the Korea Copyright Commission. Support: founders@foundersapp.kr Provider: Founders Corp., Business Registration No. 510-10-93247 Privacy Policy: https://www.notion.so/2026-05-11-35d22c9aca6c801fa39fc1dd7992b5f6 Terms of Service: https://www.notion.so/2026-05-11-35d22c9aca6c80a8ad86e4c7713f9dad
Screenshots
Verdict
The clearest difference is update cadence: ChillDay at every 2 days against DimDim zZ's every 11 days. DimDim zZ's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ChillDay ships an update every 2 days, DimDim zZ every 11 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.
| Parameter | ChillDay | DimDim zZ |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days β better | Every 11 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod β better |
| Requires iOS | 17.0 | 13.0 β better |
| Further details β not scored | ||
| Size | 2 MB | 140 MB |
| Age rating | 4+ | 17+ |
| Developer | Seungui Moon | Founders(KR) |
In-app purchases
ChillDay
No in-app purchases
DimDim zZ
No in-app purchases
