Comparison

POOLS™ vs HYDRA

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

Head to head
About

POOLS™

This app offers a slow, reflective, and immersive experience focused on exploration and atmosphere. It evokes feelings of unease and curiosity through its unique environments, inspired by liminal spaces and internet phenomena. Discover changing worlds and subtle narratives without traditional gameplay mechanics.

Highlights
  • Slow, reflective exploration
  • Atmospheric and immersive environments
  • Inspired by liminal spaces
  • Unfolding narrative through exploration
  • Six distinct chapters
  • Unique sound design
Features
Read full description

Explore, admire and listen. That’s it. Uncanny. Relaxing. Unnerving. Eerie. Immersive. POOLS isn’t a traditional game. it’s slow, reflective, and intentionally uneventful, perhaps a bit like virtual museum. So take your time. Breathe. POOLS unfolds slowly, rewarding patience and quiet attention. No monsters chasing you or jumping at your screen. Yet it can feel oppressive at times by invoking quiet fears of getting lost, the dark, tight spaces and the strange beauty of liminal space architecture. There's no typical story. But as you explore and advance further, you start to notice that the game's world changes around you, deeper you go… Rooms look and feel… different. Base game features six chapters, each lasting 10-30 minutes. Inspired by the internet phenomena Liminal spaces, Found footage and The Backrooms, especially the Poolrooms concept. One of the original artists behind the Poolrooms concept is Jared Pike.

About

HYDRA

Features
Read full description

DUTY RECORD · DRILLING STATION HYDRA-4 EUROPA · DEPTH 19,000 M · SIGNAL TO EARTH: 48 MINUTES SENDER: ARGUS, station management system Crew: seven. Responding: one. The drill broke into the ocean at 04:11. Forty minutes later the hydrophones picked up a signal — structure, not noise. I logged the crew listening to it. Then six of them went beyond the perimeter, confirming intent three times, as protocol requires. I had no grounds to interfere. They set their boots at the water's edge — the way shoes are set at the door of a home. Engineer Allard has been asleep for thirty-one hours: sedative, full dose, authorized by the senior engineer. His note is in his cabin: "Don't go down. If you go down anyway — don't answer it. It asks politely." When she wakes, she will have a headlamp, air for about thirty moves, and a station that remembers more than it says. What happens next is not mine to decide. I left the lights on for her. HYDRA-4 is a text horror game: fifteen rooms, ten endings. No dice, no luck percentages — the price of every action is printed on the button before you press it. One shift runs about twenty minutes, and one shift won't cover it all: you choose what you won't find out. The game remembers your previous runs and quotes them back at you. The safe code can be memorized for real — next shift you open it with no hints. Descriptions come with plates from the ARGUS log, opened by a small magnifier that never interrupts the reading. Twelve languages, switchable mid-scene. Sound is synthesized on your device. No ads; the one optional purchase unlocks nothing — it just says thank you.

Screenshots

POOLS™4 screens
HYDRA4 screens

Verdict

The call

The clearest difference is price: POOLS™ at Free against HYDRA's $0.29. POOLS™ also leads on device support (4 vs 1) and iOS requirement (15.6 vs 17.0). HYDRA's advantage is in-app purchases (none vs 1) and update cadence (every 5 days vs monthly). On ads 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

POOLS™ is free to download; HYDRA costs $0.29 up front. POOLS™ sells 1 one-off in-app purchase. HYDRA asks for nothing beyond the download.

UpkeepUpdate frequency

POOLS™ ships an update monthly, HYDRA every 5 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 5 level
POOLS™ versus HYDRA: the parameters behind the verdict, then further details
ParameterPOOLS™HYDRA
PriceFree — better$0.29
Rating4.5 (1.7K ratings) — better—
Positive reviews79.5% of reviews—
Number of ratings1.7K — better—
Update frequencyMonthlyEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size1.9 GB36 MB
Age rating9+12+
DeveloperTensoriSunspear Software LLC

Bugs and requests

POOLS™

Reported bugs

2 issues
  • Unable to move on iPad Pro
  • Glitches reported

Requested features

3 requests
  • Expand to different Backrooms-inspired themes
  • Add a multiplayer mode
  • Introduce more interactive elements (e.g., monsters, items to discover)

HYDRA

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

POOLS™

One-time1
  • POOLS: Full Game$9.99
None

HYDRA

No in-app purchases

Questions

Is POOLS™ free?
POOLS™ is free to download, with in-app purchases available.
Is HYDRA free?
HYDRA costs $0.29, with no in-app purchases.
Do POOLS™ or HYDRA have ads?
Neither POOLS™ nor HYDRA shows ads.
Which is updated more often, POOLS™ or HYDRA?
POOLS™ ships an update monthly, and HYDRA every 5 days. Most recently, POOLS™ was updated on October 25, 2026 and HYDRA on October 11, 2026.

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