ATMÓS vs Hydro Dots
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ATMÓS
Enhance sleep, focus, and relaxation with a personal ambient sound companion. Offers three modes: Sleep with a timer, Focus with binaural beats, and Weather with realistic nature sounds. Designed for distraction-free use.
- Sleep mode with auto-fade timer
- Focus mode with binaural beats
- Realistic weather soundscapes
- High-quality ambient audio
- Minimalist dark interface
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ATMÓS generates infinite ambient soundscapes through real-time audio synthesis. No recordings, no loops — every sound is created live on your device. Based on live weather data and your chosen mode, you'll hear a one-of-a-kind soundscape that never stops evolving. Four modes: SLEEP — Gentle drones and slow-moving tones guide you into natural sleep. Deep bass and soft textures create a calm, restful space. RELAX — Warm ambient layers ease your body and mind. Slowly shifting harmonies set the mood for unwinding. MEDITATE — Minimal, serene sounds open a space for meditation and reflection. Subtle changes gently guide your awareness. FOCUS — Clear, steady tones support deep concentration. A consistent, distraction-free soundscape for work and study. Weather-driven sound: ATMÓS reads the weather at your location — clear skies, rain, snow, wind, storms and more — and the soundscape changes with it. An immersive experience where real weather shapes the music. Features: - Real-time audio synthesis — generative music with no loops or recordings - Weather-driven — the sound follows current conditions - Four modes — SLEEP, RELAX, MEDITATE, FOCUS - Background playback - Sleep Timer (in-app purchase) Enjoy a world of sound that changes with the weather, in ATMÓS.
Hydro Dots
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Hydro Dots is a water tracker that draws your day as a rising water level, one dot at a time. Tap once to log a cup, a mug, or a bottle. The water climbs. That is the whole idea. WHAT IT DOES • One tap to log — your usual sizes sit on the first screen. Custom amounts and drink types are one tap further. • Not every drink counts the same — coffee, tea, juice and the rest are converted by their hydration index, so what you log is what your body keeps. • A goal that follows your day — body weight, temperature, humidity, UV and activity shape the target. It settles once, the first time you open the app each day, so it never moves under you. • Reminders that know where you stand — each one carries how much you have had and the pace that would get you there. • History and recap — a week of bars, a month of dots, a streak counter, and the month's total turned into things you can picture: bottles, kettles, sugar you avoided. • Widgets — log from the home screen or the lock screen without opening the app. A month of dots fits on the large one. • Shortcuts and Siri — log a drink or ask what you have had today, hands free. Every action is available to build your own routines. • Apple Health — records can be written to Health, and removing a record takes it back out. PRO A one-time purchase. No subscription. • No ads • Every theme — seven palettes, from cream LCD to OLED black • iCloud sync — records and drinks across your devices PRIVACY What you drink stays on your device. Your records are not sent anywhere unless you turn on iCloud sync, and then they go to your own iCloud, not to us.
Screenshots
Verdict
The clearest difference is ads: ATMÓS at none against Hydro Dots's shown. ATMÓS also leads on iOS requirement (15.0 vs 26.0). Hydro Dots's advantage is update cadence (daily vs fortnightly). On price, 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
Both are free to download. ATMÓS sells 1 one-off in-app purchase and Hydro Dots sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
ATMÓS ships an update fortnightly, Hydro Dots daily. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.
| Parameter | ATMÓS | Hydro Dots |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Fortnightly | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 25 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroya Tanaka | Kengo Tate |
In-app purchases
ATMÓS
- Sleep Timer$2.99
Hydro Dots
- A drop$0.99
- A glass$2.99
- A bottle$5.99
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- Pro — Founding Member$5.99









