Comparison

ATMÓS vs Hydro Dots

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

Head to head
About

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.

Highlights
  • Sleep mode with auto-fade timer
  • Focus mode with binaural beats
  • Realistic weather soundscapes
  • High-quality ambient audio
  • Minimalist dark interface
Features
Read full description

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.

About

Hydro Dots

Features
Read full description

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

ATMÓS4 screens
Hydro Dots4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

ATMÓS ships an update fortnightly, Hydro Dots daily. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
ATMÓS versus Hydro Dots: the parameters behind the verdict, then further details
ParameterATMÓSHydro Dots
PriceFreeFree
Rating4.8 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyFortnightlyDaily — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size25 MB43 MB
Age rating4+4+
DeveloperHiroya TanakaKengo Tate

In-app purchases

1 purchases

ATMÓS

One-time1
  • Sleep Timer$2.99
4 purchases

Hydro Dots

One-time4
  • A drop$0.99
  • A glass$2.99
  • A bottle$5.99
Show 1 more
  • Pro — Founding Member$5.99

Questions

Is ATMÓS free?
ATMÓS is free to download, with in-app purchases available.
Is Hydro Dots free?
Hydro Dots is free to download, with in-app purchases available.
Do ATMÓS or Hydro Dots have ads?
Hydro Dots shows ads; ATMÓS does not.
Which is updated more often, ATMÓS or Hydro Dots?
ATMÓS ships an update fortnightly, and Hydro Dots daily. Most recently, ATMÓS was updated on October 10, 2026 and Hydro Dots on October 11, 2026.

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