Protocol 4 vs PathFill
Price, ratings, monetisation and update history for both games, side by side โ 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?
PathFill
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Find calm and push your limits. PathFill is more than a number-connection game; it is a visual and tactile feast for your senses. By simply connecting numbers in order, like โ1 โ 2 โ 3โ, you must use logic to fill every single cell on the grid. What starts as a simple rule quickly evolves into endless possibilities across different grid sizes. Core Features - Massive level library: Enjoy over 10,000 carefully crafted levels, spanning four difficulty tiers from Beginner to Master. - Daily Challenge: Compete alongside players around the world with a unique puzzle every day, refreshed at 00:00 UTC+0, and collect exclusive honor badges. - Aurora aesthetics: Dive into the signature โAuroraโ gradient theme, enhanced with snow and spark particle effects to create a stunning puzzle interface. - Immersive feel: With deep integration of iOS Haptics, every connection delivers a satisfying tactile punch; Apple Music support lets you solve puzzles to the rhythm of your favorite tracks. - Mental competition: Full Game Center support lets you chase global leaderboards, while the achievement system records every step of your progress. Gameplay - Simple and intuitive: Slide your finger to connect numbers, making sure paths do not overlap and every cell on the grid is filled. - Smart hints: Stuck on a tricky level? Spend your in-game points to unlock hints and break through roadblocks. - Pure experience: A minimalist interface with full dark mode support reduces eye strain and saves battery for long puzzle sessions.
Screenshots
Verdict
The clearest difference is update cadence: PathFill at daily against Protocol 4's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Protocol 4 sells 7 one-off in-app purchases and PathFill sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Protocol 4 ships an update every 3 months, PathFill daily. Both last shipped on October 8, 2026.
| Parameter | Protocol 4 | PathFill |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Daily โ better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details โ not scored | ||
| Size | 12 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | HAKAN OZGER | Hai-Chou Wang |
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
PathFill
- Remove Ads$0.99
- 10 Points$1.99
- 50 points$8.99
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- 100 points$15.99









