Protocol 4 vs Place&Digits
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Protocol 4
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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?
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.
- Number guessing puzzle
- Unique digit challenges
- Place & Digit feedback system
- 3 difficulty levels
- Global leaderboards
- Dark mode
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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
Verdict
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
Both are free to download. Protocol 4 sells 7 one-off in-app purchases. Place&Digits asks for nothing beyond the download.
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.
| Parameter | Protocol 4 | Place&Digits |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 12 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | HAKAN OZGER | Abhishek Patel |
In-app purchases
Protocol 4
- Pocket Change$0.99
- Starter Kit$1.99
- Agent License$2.99
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- Hacker's Stash$4.99
- Pro Kit$4.99
- Trust Fund$9.99
- Master Kit$9.99
Place&Digits
No in-app purchases









