Comparison

Billy Frontier vs ZOOKEEPER DX

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

Head to head
About

Billy Frontier

Embark on a galactic adventure as a space cowboy eliminating alien outlaws. This 3D game blends arcade action with adventure, featuring intense duels, thrilling chases, and target practice. Experience a unique spaghetti western-inspired universe.

Highlights
  • Galactic outlaw hunting
  • 3D space cowboy adventure
  • Arcade-style duels
  • Stampede evasion
  • Shooting gallery challenges
Features
Read full description

• WINNER of the Pocket Gamer Silver Award! Billy Frontier is a space cowboy who's mission is to rid the galaxy of alien outlaws. This is the most diverse 3D game you'll find for iOS - it is a combination of adventure game and arcade game with a whole lot of blood spewing action in-between! You'll test your reflexes in Duels, see if you can outrun a stampeding herd of Kanga-Cows (half kangaroo, half cow), hunt down alien bandits in gun battles, and blast catapulted critters out of the sky in the Shooting Gallery! This is a great game that pays homage to the spaghetti western genre!

About

ZOOKEEPER DX

Engage in a classic match-three puzzle game where you swap adjacent panels to line up three or more of the same color. Clear levels by catching a quota of animals, with multiple modes offering different challenges and scoring opportunities.

Highlights
  • Swap adjacent panels
  • Match three or more animals
  • Catch animals to clear levels
  • Normal Mode
  • Tokoton Mode (unlimited time)
  • Score Attack Mode (3-minute challenge)
  • Online multiplayer
Features
Read full description

10 million people are playing! Zoo Keeper, the definitive action puzzle game finally available for iPhone/iPad/iPod touch! Aim for it! The Best Opp Zookeeper! [game description] This is a simple puzzle game with a simple rule: swap two panels next to each other, and line up three or more panels of the same color to make them disappear. Touch the animal you want to move and slide it in the direction of the animal you want to replace. If you line up 3 or more same animals vertically or horizontally, you can catch the animal. The level is cleared when a quota of animals are caught. [mode description] *Normal Mode Catch more than your quota of animals to clear all levels! *Tokoton Mode Level up with 100 animals! This is a challenging mode with unlimited time. *Score Attack Mode Try to score as many points as possible in a 3-minute challenge in Fever mode! You will receive a time extension when you score over 10,000 points and 100,000 points. *Play Zoo Keeper Online Play Zoo Keeper online for free! (Link to App Store "ZOOKEEPER BATTLE".) [ranking description] You can participate in the ranking by logging into Game Center and using Leaderboards. Compete with players around the world for high scores! [System Requirements] iOS 11 or later; iPhone 5s or later, iPad 5th generation or later, iPod touch 6th generation or later

Screenshots

Billy Frontier4 screens
ZOOKEEPER DX4 screens

Verdict

The call

The clearest difference is monetization model: ZOOKEEPER DX at free against Billy Frontier's paid. ZOOKEEPER DX also leads on ratings volume (43 vs 14). Billy Frontier's advantage is iOS requirement (8.0 vs 11.0). On price, rating, review sentiment and update cadence 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

Billy Frontier costs $0.99 and ZOOKEEPER DX $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.7 for Billy Frontier against 3.7 for ZOOKEEPER DX. Both are backed by a comparable volume of ratings — 14 and 43 respectively. Written reviews are what separate them: 65% of Billy Frontier's written reviews are positive against 60% of ZOOKEEPER DX's.

UpkeepUpdate frequency

Billy Frontier ships an update every 2 months, ZOOKEEPER DX every 3 months. The most recent releases landed on September 28, 2026 and September 27, 2026 respectively.

Scorecard3 real differences · 7 level
Billy Frontier versus ZOOKEEPER DX: the parameters behind the verdict, then further details
ParameterBilly FrontierZOOKEEPER DX
Price$0.99$0.99
Rating3.7 (14 ratings)3.7 (43 ratings)
Positive reviews64.7% of reviews — better60.3% of reviews
Number of ratings1443 — better
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better11.0
Further details — not scored
Size44 MB206 MB
Age rating12+4+
DeveloperPangea Software, Inc.KITERETSU INC.

Customer experience

Billy Frontier

All ratings14 ratings
Positive64.3%
Neutral0.0%
Negative35.7%
Written reviews447 reviews
Positive64.7%
Neutral13.6%
Negative21.7%

ZOOKEEPER DX

All ratings43 ratings
Positive58.1%
Neutral18.6%
Negative23.3%
Written reviews262 reviews
Positive60.3%
Neutral17.9%
Negative21.8%

User reviews

Billy Frontier

From 14 App Store ratings

What we love

  • 🚀 Great graphics and sound
  • 👍 Diverse gameplay modes
  • 💡 Unique western-alien theme
  • 🤑 Excellent value for money

Room to improve

  • 🐛 Frequent crashes and bugs
  • 🎯 Inaccurate shooting controls
  • 🕰️ Short gameplay with limited content
  • 🤔 Unintuitive control settings

ZOOKEEPER DX

From 43 App Store ratings

What we love

  • 👍 Fun and addictive gameplay
  • 👍 Cute and charming visuals
  • 👍 Great for passing time
  • 👍 Nostalgic for DS players
  • 🚀 Smooth performance on newer devices

Room to improve

  • 🐛 Compatibility issues on older devices
  • 🐛 Choppy animations and frame rate
  • 🐛 Unresponsive controls
  • 🐛 Difficulty ramps up too quickly
  • 🐛 Partial screen cutoff on iPhone

Bugs and requests

Billy Frontier

Reported bugs

4 issues
  • Game crashes on launch or during play
  • Shooting controls not responsive or accurate
  • Saved progress lost after crashes
  • Control settings reset on each launch

Requested features

4 requests
  • More levels and gameplay modes
  • Difficulty settings and progression
  • Ability to save progress and high scores
  • Customization options (e.g. disable blood)

ZOOKEEPER DX

Reported bugs

4 issues
  • Game crashes on launch for some users
  • Leaderboards show impossible high scores
  • Pause function can be exploited
  • Inconsistent performance across devices

Requested features

5 requests
  • Add quest mode from DS version
  • Include time attack and other game modes
  • Allow disabling timer for casual play
  • Implement local high scores with names
  • Add colorblind accessibility options

In-app purchases

None

Billy Frontier

No in-app purchases

None

ZOOKEEPER DX

No in-app purchases

Questions

Is Billy Frontier free?
Billy Frontier costs $0.99, with no in-app purchases.
Is ZOOKEEPER DX free?
ZOOKEEPER DX costs $0.99, with no in-app purchases.
Which has better reviews, Billy Frontier or ZOOKEEPER DX?
Billy Frontier and ZOOKEEPER DX are both rated 3.7 out of 5 on the App Store, from 14 and 43 ratings respectively.
Do Billy Frontier or ZOOKEEPER DX have ads?
Neither Billy Frontier nor ZOOKEEPER DX shows ads.
Which is updated more often, Billy Frontier or ZOOKEEPER DX?
Billy Frontier ships an update every 2 months, and ZOOKEEPER DX every 3 months. Most recently, Billy Frontier was updated on September 28, 2026 and ZOOKEEPER DX on September 27, 2026.

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