Comparison

Protocol 4 vs Place&Digits

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

Head to head
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?

About

Place&Digits

A logic puzzle game where you guess a secret number with unique digits. Receive feedback on correct digits and their positions to deduce the solution. Features multiple difficulty levels and global leaderboards.

Highlights
  • Number guessing puzzle
  • Unique digit challenges
  • Place & Digit feedback system
  • 3 difficulty levels
  • Global leaderboards
  • Dark mode
Features
Read full description

Challenge your logic with Place&Digits! Dive into the ultimate number-guessing puzzle that tests your brainpower and deduction skills. HOW TO PLAY: The system picks a secret number with unique digits. Your goal is to guess it in the fewest tries possible. After every guess, you get feedback: PLACE: A correct digit in the correct position. (Green) DIGIT: A correct digit, but in the wrong position. (Yellow) EXAMPLE: Secret Number: 1234 Your Guess: 1543 Feedback: 1 Place, 2 Digits (The '1' is perfect. The '4' and '3' are correct numbers but in the wrong spots). FEATURES: 3 Difficulty Levels: Start with 3 digits, master 4, or challenge yourself with 5. Global Leaderboards: See how you rank against players worldwide for Speed and Efficiency. History Tracking: Review your past games and improve your strategy. Dark Mode: Sleek, battery-saving interface designed for focus. Haptic Feedback: Feel the game with immersive vibrations. Download now and start guessing!

Screenshots

Protocol 44 screens
Place&Digits3 screens

Verdict

The call

The clearest difference is in-app purchases: Place&Digits at none against Protocol 4's 7. Place&Digits also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price, update cadence 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. Protocol 4 sells 7 one-off in-app purchases. Place&Digits asks for nothing beyond the download.

UpkeepUpdate frequency

Protocol 4 ships an update every 3 months, Place&Digits every 2 months. The most recent releases landed on October 8, 2026 and October 18, 2026 respectively.

Scorecard3 real differences · 6 level
Protocol 4 versus Place&Digits: the parameters behind the verdict, then further details
ParameterProtocol 4Place&Digits
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size12 MB33 MB
Age rating4+4+
DeveloperHAKAN OZGERAbhishek Patel

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
None

Place&Digits

No in-app purchases

Questions

Is Protocol 4 free?
Protocol 4 is free to download, with in-app purchases available.
Is Place&Digits free?
Place&Digits is free to download, with no in-app purchases.
Do Protocol 4 or Place&Digits have ads?
Protocol 4 shows ads; Place&Digits does not.
Which is updated more often, Protocol 4 or Place&Digits?
Protocol 4 ships an update every 3 months, and Place&Digits every 2 months. Most recently, Protocol 4 was updated on October 8, 2026 and Place&Digits on October 18, 2026.

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