Comparison

HZ.io vs Mathchool

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

Head to head
About

HZ.io

Engage in a real-time online survival game where you either evade zombies as a survivor or hunt them as a zombie. Teams win by achieving their objectives within a 200-second time limit. Customize your character and communicate with others.

Highlights
  • Real-time online multiplayer
  • Survivor vs. Zombie gameplay
  • 200-second win conditions
  • Level up system
  • Custom skins and decorations
  • In-game chat
Features
Read full description

Real time online survival game HZ Become a survivor and survive to the end avoiding zombies. Become a zombie to find and infect survivors. Survivor team wins if any one survives 200 seconds! Zombie team wins if you infect all survivors before 200 seconds! [Game Features] -Real time online multiplayer game -If you are a survivor team, survive for 200 seconds to win -If you are a zombie team, infect all survivors in 200 seconds to win. -Level up system -Your own skin and decoration -Chat system Please send your inquiries by e-mail

About

Mathchool

Engage in a real-time multiplayer hide-and-seek game set in a unique school populated by Dokkaebi. Solve math problems to collect items, help friends, and escape the tagger. It's a fun way to learn and play simultaneously.

Highlights
  • Real-time multiplayer hide-and-seek
  • Solve math problems for items
  • Character customization
  • AI-powered math problems
  • Cooperative gameplay
Features
Read full description

Not an ordinary school. It's a strange school where Dokkaebi attend! It's a new kind of school that's different from regular schools. Let's escape from school by avoiding the tagger! Solve problems to get items and help your friends. Solve problems given by the caretaker to save your friends while playing and studying math at the same time with your friends! And the best part is, it's a game that won't get you in trouble with your parents! If you're confident in hide-and-seek, come join us now! [Game Introduce] Mathchool is a real-time multi-play hide-and-seek game that you can enjoy on your mobile. You can avoid the tagger and solve quiz to get items while learning at the same time. Feel the fun of solving problems, the learning effects of playing games, and the fun of competing with other players! Now start having fun playing and learning with Mathchool! [Game function] - Woongjin Thinkbig Learning AI System provides math problems that meet the level of learning. - System for getting items by solving problems. - Decorate your own character with different hairstyles, colors, etc. - Real time multi-play with friends.

Screenshots

HZ.io4 screens
Mathchool4 screens

Verdict

The call

The clearest difference is review sentiment: HZ.io at 62% against Mathchool's 0%. HZ.io also leads on update cadence (every 2 days vs every 3 months) and iOS requirement (10.0 vs 12.0). Mathchool's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price 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. HZ.io sells 10 one-off in-app purchases. Mathchool asks for nothing beyond the download.

UpkeepUpdate frequency

HZ.io ships an update every 2 days, Mathchool every 3 months. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
HZ.io versus Mathchool: the parameters behind the verdict, then further details
ParameterHZ.ioMathchool
PriceFreeFree
Rating3.2 (5 ratings) — better—
Positive reviews61.5% of reviews — better0.0% of reviews
Number of ratings5 — better—
Update frequencyEvery 2 days — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better12.0
Further details — not scored
Size171 MB270 MB
Age rating9+4+
DeveloperGene EuWoongjin Thinkbig Co., Ltd.

Customer experience

HZ.io

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews13 reviews
Positive61.5%
Neutral7.7%
Negative30.8%

Mathchool

Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

10 purchases

HZ.io

One-time10
  • Zombie 5 Slot$0.99
  • Survivor 5 Slot$0.99
  • Zombie 10 Slot$1.99
Show 7 more
  • Survivor 10 Slot$1.99
  • 50,000 Coin$1.99
  • Survivor 20 Slot$2.99
  • Zombie 20 Slot$2.99
  • Exp +50%$3.99
  • Coin +50%$3.99
  • Remove Ad$5.99
None

Mathchool

No in-app purchases

Questions

Is HZ.io free?
HZ.io is free to download, with in-app purchases available.
Is Mathchool free?
Mathchool is free to download, with no in-app purchases.
Do HZ.io or Mathchool have ads?
HZ.io shows ads; Mathchool does not.
Which is updated more often, HZ.io or Mathchool?
HZ.io ships an update every 2 days, and Mathchool every 3 months. Most recently, HZ.io was updated on October 15, 2026 and Mathchool on October 13, 2026.

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