Comparison

Helix Protocol vs Evil Ducks Castle

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

Head to head
About

Helix Protocol

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When humanity faced the threat of an alien invasion, Earthโ€™s last line of defense was activated โ€” the Helix Protocol. - The Immortal Warrior - You are a clone, reborn after every death through advanced consciousness and memory replication. Each defeat makes you stronger. - Progress Through Experience - The system analyzes your performance and rewards you with credits. Use them to upgrade your ship and unlock its full potential. Tactical Energy Management: Redirect power between shields, weapons, and engines to adapt to the evolving threats in battle. - Ship Customization - Tune your ship to match your playstyle and gain a strategic advantage. - Global Pilot Rankings - Compete with other players on the leaderboard that reflects your achievements in combat. Helix Protocol is more than survival. Itโ€™s a journey of evolution, relentless improvement, and resistance. Prove youโ€™re not just a survivor โ€” turn every defeat into experience, and every victory into a new era in the war for Earthโ€™s future.

About

Evil Ducks Castle

Features
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Action packed endless flying style game with an end! Fly through 10 intense rhythm based stages to get through the castle. Avoid all obstacles in your way and Beware of the Evil Ducks Ghost who is lurking within the castle. Tap Tap or Tap and hold simple one touch controls.

Screenshots

Helix Protocol4 screens
Evil Ducks Castle4 screens

Verdict

The call

The clearest difference is price: Helix Protocol at Free against Evil Ducks Castle's $0.99. Helix Protocol also leads on update cadence (every 3 weeks vs every 37 months). Evil Ducks Castle's advantage is in-app purchases (none vs 7) and ads (none vs shown).

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

Helix Protocol ships an update every 3 weeks, Evil Ducks Castle every 37 months. Both last shipped on October 8, 2026.

Scorecard6 real differences ยท 0 level
Helix Protocol versus Evil Ducks Castle: the parameters behind the verdict, then further details
ParameterHelix ProtocolEvil Ducks Castle
PriceFree โ€” better$0.99
Update frequencyEvery 3 weeks โ€” betterEvery 37 months
AdsYesNo โ€” better
In-app purchasesYesNo โ€” better
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS16.012.2 โ€” better
Further details โ€” not scored
Size45 MB21 MB
Age rating9+4+
DeveloperOleksii PoliakovAnthony Hindle

In-app purchases

7 purchases

Helix Protocol

One-time7
  • 50K Credits$2.99
  • 125K Credits$5.99
  • 175K Credits$8.99
Show 4 more
  • 250K Credits$12.99
  • 500K Credits$19.99
  • 750K Credits$24.99
  • 1M Credits$29.99
None

Evil Ducks Castle

No in-app purchases

Questions

Is Helix Protocol free?
Helix Protocol is free to download, with in-app purchases available.
Is Evil Ducks Castle free?
Evil Ducks Castle costs $0.99, with no in-app purchases.
Do Helix Protocol or Evil Ducks Castle have ads?
Helix Protocol shows ads; Evil Ducks Castle does not.
Which is updated more often, Helix Protocol or Evil Ducks Castle?
Helix Protocol ships an update every 3 weeks, and Evil Ducks Castle every 37 months. Most recently, Helix Protocol was updated on October 8, 2026 and Evil Ducks Castle on October 8, 2026.

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