Comparison

Hydrostate vs BT21 Messenger Simulator

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

Head to head
About

Hydrostate

Build and manage a city's water system by connecting pipes and optimizing flow. Solve challenging puzzles, upgrade your network, and expand your water empire in a vibrant 3D environment. Enjoy relaxing yet engaging gameplay as you ensure every building receives water.

Highlights
  • Build and connect water pipes
  • Manage water flow and pressure
  • Solve logic and planning puzzles
  • Upgrade and expand city water network
  • Experience beautiful 3D environments
  • Relaxing and engaging gameplay
Features
Read full description

Water Network Builder 3D – Build & Manage Water Flow! Step into the world of Water Network Builder 3D and become the master of your city’s water system! Connect pipes, manage flow, and make sure every home and building gets the water it needs. With challenging puzzles, smart upgrades, and 3D environments, you’ll keep your city running smoothly while growing your water empire. Features: Build & Connect Pipes: Strategically lay out pipes to deliver water efficiently. Manage Water Flow: Monitor pressure, control valves, and optimize your network. Challenging Puzzles: Solve levels that test your logic, planning, and creativity. Upgrade & Expand: Unlock new pipe types, tools, and city zones. Beautiful 3D Environments: Watch your city come to life with flowing water animations. Relaxing Yet Engaging: Casual gameplay with a sense of progress and accomplishment. Whether you love puzzles, strategy, or building games, Water Network Builder 3D will keep you entertained for hours. Plan smart, manage efficiently, and see your water network thrive!

About

BT21 Messenger Simulator

Engage in playful, interactive conversations with virtual characters. Choose your responses and see how they reply, creating a personalized chat experience. It's a game where your choices shape the dialogue.

Highlights
  • Interactive chat conversations
  • Choose your dialogue responses
  • Personalized chat experience
  • Playful and engaging gameplay
  • Virtual character interactions
Features
Read full description

Welcome to our Chat Messenger Simulator! Have you ever dreamed of getting a "Good morning" text from someone? Or trading jokes? Now you can! Now you can dive into a playful, interactive world where you chat like they're right there on your phone! Choose what you want to say, see how they respond, and enjoy fun, flirty conversations designed to feel engaging and personal. Every interaction is part of a game, where your choices shape the replies you receive.

Screenshots

Hydrostate4 screens
BT21 Messenger Simulator4 screens

Verdict

The call

The clearest difference is in-app purchases: BT21 Messenger Simulator at none against Hydrostate's 10. Hydrostate's advantage is iOS requirement (15.0 vs 26.2). On price, rating, ratings volume and 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

Both are free to download. Hydrostate sells 10 one-off in-app purchases. BT21 Messenger Simulator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for Hydrostate against 4.5 for BT21 Messenger Simulator. Both are backed by a comparable volume of ratings — 13 and 8 respectively.

Scorecard3 real differences · 7 level
Hydrostate versus BT21 Messenger Simulator: the parameters behind the verdict, then further details
ParameterHydrostateBT21 Messenger Simulator
PriceFreeFree
Rating4.4 (13 ratings)4.5 (8 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings13 — better8
Update frequencyEvery 2 weeks—
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.2
Further details — not scored
Size350 MB193 MB
Age rating9+4+
DeveloperAAM GAMES LTDThomas Chen

In-app purchases

10 purchases

Hydrostate

One-time10
  • Get 7 Water Tanks$0.99
  • Cash 300k$0.99
  • Cash 300K$0.99
Show 7 more
  • 75 Gems$0.99
  • Get 16 Water Tanks$1.99
  • Auto Cash Collector$1.99
  • Cash 1M$2.99
  • Remove Pop up ads$2.99
  • 1M Cash$2.99
  • 250 Gems$2.99
None

BT21 Messenger Simulator

No in-app purchases

Questions

Is Hydrostate free?
Hydrostate is free to download, with in-app purchases available.
Is BT21 Messenger Simulator free?
BT21 Messenger Simulator is free to download, with no in-app purchases.
Which has better reviews, Hydrostate or BT21 Messenger Simulator?
BT21 Messenger Simulator is rated higher. Hydrostate averages 4.4 out of 5 from 13 ratings, while BT21 Messenger Simulator averages 4.5 from 8 ratings.
Do Hydrostate or BT21 Messenger Simulator have ads?
Both Hydrostate and BT21 Messenger Simulator show ads.

Other comparisons