Comparison

KemoDoku vs Protocol 4

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

Head to head
About

KemoDoku

This logic game offers a charming twist on classic Sudoku, replacing numbers with adorable animal icons. It provides a variety of difficulty levels and modes suitable for both beginners and experienced players, all playable offline. Enjoy hours of engaging brain training with delightful animal graphics.

Highlights
  • Classic and animal icon Sudoku
  • Multiple difficulty levels
  • Offline play support
  • Beautiful animal graphics
  • Brain training and logic development
Features
Read full description

Sudoku with Animals – the charming logic game for kids and adults! Dive into the world of puzzles: this Sudoku app combines the classic number game with adorable animal icons. Whether you’re a beginner or an experienced Sudoku pro – you’ll find the perfect challenge here. Train your brain, sharpen your focus, and enjoy hours of animal-themed puzzle fun. Game Features: • Classic & Animal Sudoku – solve puzzles in the traditional 9x9 format or discover creative variants with animal icons. • Multiple difficulty levels – from easy to hard, ideal for kids, teens, and adults. • Play offline – enjoy Sudoku anytime, anywhere, even without an internet connection. • Beautiful design – colorful animal graphics like cats, dogs, horses, and zoo animals make every puzzle unique. Why play Sudoku? Sudoku is one of the best brain-training games. It boosts memory, logic, and concentration. With animals, puzzling becomes even more fun: • Engaging brain exercise for kids and adults • Stress relief through relaxing puzzles • Improves logical thinking and problem-solving • Perfect for quick sessions or longer puzzle adventures Who is this app for? • Sudoku fans looking for a creative new twist • Families who love solving puzzles together • Kids who want to learn logic and patience in a playful way • Adults who enjoy puzzle and brain-teaser games • Animal lovers who want brain training with extra fun Sudoku, animals, puzzles, brain training – all in one app! Solve exciting logic games, discover cute animal designs, and see how much fun Sudoku can be. Whether it’s cats, dogs, pandas, or other animals – your next puzzle adventure is waiting!

About

Protocol 4

Features
Read full description

Crack the code before your rival does. Protocol 4 is a hacker game of pure deduction. Every guess gives you signal readings; you break the passcode with logic, not luck. Play solo, take on the Daily Operation, or duel another operator in real time. REAL-TIME PvP DUELS Race: one passcode, two operators. First one through wins. Standoff: each of you sets the code the other must break. Two codes, one clock, and you watch them close in on yours. Outsmart your rival and claim the reward. DAILY OPERATION A new code every day, the same for everyone. Crack it, climb the daily leaderboard and earn double XP. BUILD YOUR EMPIRE Assemble mining rigs, expand your vault, and run overclocks. Your network keeps earning credits while you are away. SYNDICATES AND TERRITORY Join one of three syndicates, claim territory on the map, and take your share of the pot that every raid feeds. RAIDS Break into a rival operator's grid and take what they left unguarded, then set your own defenses before they come for you. GLOBAL LEADERBOARD Earn XP and climb fifteen ranks to become the ultimate Server King. MORE WAYS TO PLAY Quick Hacks for fast action, Training to sharpen your deduction, and 18 career contracts plus fresh daily missions. ARSENAL OF TOOLS Oracle Scan, Double XP and more hacking tools to gain the upper hand when a code will not give. Play in English, Turkish, Spanish, French, German or Portuguese, on iPhone and iPad. Are you ready to initiate Protocol 4?

Screenshots

KemoDoku4 screens
Protocol 44 screens

Verdict

The call

The clearest difference is price: Protocol 4 at Free against KemoDoku's $0.99. KemoDoku's advantage is in-app purchases (none vs 7) and ads (none vs shown). On device support and iOS requirement 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

Protocol 4 is free to download; KemoDoku costs $0.99 up front. Protocol 4 sells 7 one-off in-app purchases. KemoDoku asks for nothing beyond the download.

UpkeepUpdate frequency

KemoDoku ships an update every 2 days, Protocol 4 every 3 months. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 5 level
KemoDoku versus Protocol 4: the parameters behind the verdict, then further details
ParameterKemoDokuProtocol 4
Price$0.99Free — better
Rating4.5 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 days — betterEvery 3 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 — better17.0
Further details — not scored
Size14 MB12 MB
Age rating4+4+
DeveloperMartin HanskeHAKAN OZGER

In-app purchases

None

KemoDoku

No in-app purchases

7 purchases

Protocol 4

One-time7
  • Pocket Change$0.99
  • Starter Kit$1.99
  • Agent License$2.99
Show 4 more
  • Hacker's Stash$4.99
  • Pro Kit$4.99
  • Trust Fund$9.99
  • Master Kit$9.99

Questions

Is KemoDoku free?
KemoDoku costs $0.99, with no in-app purchases.
Is Protocol 4 free?
Protocol 4 is free to download, with in-app purchases available.
Do KemoDoku or Protocol 4 have ads?
Protocol 4 shows ads; KemoDoku does not.
Which is updated more often, KemoDoku or Protocol 4?
KemoDoku ships an update every 2 days, and Protocol 4 every 3 months. Most recently, KemoDoku was updated on October 24, 2026 and Protocol 4 on October 8, 2026.

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