Comparison

EyeSight Challenge 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

EyeSight Challenge

Features
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Eye Challenge – Eye Training & Brain Game Can your eyes keep up? Eye Challenge is the only brain training app built around your visual system — combining color blind tests, reaction speed training, eye movement exercises, and pattern memory challenges into one powerful daily workout. Train your focus. Test your perception. Track your growth. Why 10,000+ Players Train with Eye Challenge • Sharpen visual accuracy and observation skills • Boost focus, concentration, and attention span • Build faster reaction time and eye-hand coordination • Improve short-term memory and pattern recognition • Stay mentally sharp through fun, progressive gameplay Visual Training Game Modes Color Blind Test Mode Spot hidden numbers and letters inside complex color patterns. Inspired by real clinical color perception techniques. Gets harder as your accuracy improves. Odd Color Challenge Find the tile that doesn't match in a grid of near-identical colors. Each level pushes your visual discrimination to the limit. Flash Memory Test Memorize a pattern. It vanishes. Recreate it from memory. The fastest way to build short-term visual recall and attention. Eye Movement Training OKN (Optokinetic Nystagmus) training — the same eye-movement technique used in vision therapy — reimagined as a fast-paced reflex game. Train your eyes to track and respond faster. Progress Tracking & Stats • Games played and accuracy percentage • Personal best scores per mode • Daily streak tracking • Full performance history See yourself improve — session by session. Achievements & Milestones Complete daily challenges, hit accuracy goals, and maintain streaks to unlock milestones. Consistency is rewarded. Designed for Every User • Clean, modern interface with smooth animations • Light and dark mode support • Sound and vibration settings • Optimized for all screen sizes • Suitable for all age groups — no prior experience needed Unlock Premium — Your Way • Lifetime Access — One-time payment. All premium features, forever. No recurring charges. • Monthly Plan — Full premium access with flexible, cancel-anytime billing. • Remove Ads — Permanently remove all ads, including rewarded ads. Perfect For Students · Professionals · Gamers · Athletes · Anyone serious about visual fitness and mental performance Privacy Policy: https://appreator.com/privacy-policy/ Terms of Use: https://appreator.com/terms-of-use/ Your eyes are more trainable than you think. Start proving it.

About

Protocol 4

Features
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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?

Screenshots

Protocol 44 screens

Verdict

The call

The clearest difference is ads: EyeSight Challenge at none against Protocol 4's shown. EyeSight Challenge also leads on iOS requirement (15 vs 17.0). Protocol 4's advantage is update cadence (every 3 months vs every 24 months). On price, in-app purchases 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. EyeSight Challenge sells 3 in-app purchases, starting at $2.99 per month and Protocol 4 sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

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

Scorecard3 real differences · 5 level
EyeSight Challenge versus Protocol 4: the parameters behind the verdict, then further details
ParameterEyeSight ChallengeProtocol 4
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 24 monthsEvery 3 months — better
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15 — better17.0
Further details — not scored
Size34 MB12 MB
Age rating4+4+
DeveloperNitin GohelHAKAN OZGER

In-app purchases

3 purchases

EyeSight Challenge

Subscriptions1
  • Monthly Subscription Plan$2.991 Month
One-time2
  • Remove Ads Plan$3.99
  • Lifetime Plan$19.99
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 EyeSight Challenge free?
EyeSight Challenge is free to download, with in-app purchases available.
Is Protocol 4 free?
Protocol 4 is free to download, with in-app purchases available.
Do EyeSight Challenge or Protocol 4 have ads?
Protocol 4 shows ads; EyeSight Challenge does not.
Which is updated more often, EyeSight Challenge or Protocol 4?
EyeSight Challenge ships an update every 24 months, and Protocol 4 every 3 months. Most recently, EyeSight Challenge was updated on October 24, 2026 and Protocol 4 on October 8, 2026.

Other comparisons