Comparison

Endless Runner X vs Kai

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

Head to head
About

Endless Runner X

This endless runner game challenges players to break free from a repetitive cycle. By corrupting the code, players can uncover secrets, unlock new content, and ultimately save the hero. It offers arcade fun with leaderboards for competitive play.

Highlights
  • Tap to jump mechanics
  • Code corruption for secrets
  • Unlock new levels and modes
  • Compete on leaderboards
  • Discover hidden story
Read full description

It’s just another endless runner... or is it? It may look like the same old cycle again and again - run, jump, die, repeat - but corrupting the code can create the chance to elude the endless monotony, find new meaning and free our helpless hero! Prove that you are the player with the finger tapping, puzzle solving and system fighting skills to rival them all! Find the secret, rise to the challenge, and escape the loop! GAME FEATURES • Easy to play! Just tap to jump... at first... • Secrets abound! Corrupt the code and discover the story. • Endless arcade fun! Unlock new levels and game modes. • Epic challenge! For casual and hardcore players alike. • Leaderboards! Compete with your friends and the world. Please note: ‘Endless Runner X’ is free to play and supported by in-game ads. An in-app purchase is available to remove ads from the game.

About

Kai

Navigate a dark, haunting nightmare as Kai, a black sheep trapped in an endless run for sanity. Master simple tap controls to dodge obstacles on the ground and in the air, collecting coins to challenge your high score in this atmospheric endless runner.

Highlights
  • Simple tap controls
  • Ground and flying modes
  • Dodge ground and air obstacles
  • Collect coins
  • Challenge high scores
  • Creepy environment
Features
Read full description

In this dark and moody endless runner filled with memories that haunt young Kai, a self-labeled black sheep of the family, is trapped in a run for sanity within a nightmare. From its first moments, the creepiness of Kai’s world makes itself known with a soundtrack that darkens Kai’s journey into his fears even further.  A true challenge for fans of endless runner games, Kai’s simple interface offers a mixture of ground and flying mode that players will have to balance in order to survive.  In this place, it’s like a nightmare that never ends. An endless runner loop that Kai may never escape. Play if you dare. • Simple tap mechanic controls • Creepy environment to fly, glide and run through • Dodge the wheels on the ground as you run or the birds in the air as you fly • Fly over obstacles on the ground and birds in the air • Collect as many coins throughout the journey  • Challenge your high-score when you reenter the nightmare

Screenshots

Endless Runner X4 screens
Kai4 screens

Verdict

The call

The clearest difference is rating: Kai at 5.0 against Endless Runner X's 4.4. Kai also leads on in-app purchases (none vs 1) and review sentiment (100% vs 85%). Endless Runner X's advantage is ratings volume (257 vs 4). On price, update cadence, ads 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. Endless Runner X sells 1 one-off in-app purchase. Kai asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Kai holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Endless Runner X has 257 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 85% of Endless Runner X's written reviews are positive against 100% of Kai's.

UpkeepUpdate frequency

Endless Runner X ships an update every 6 weeks, Kai every 2 months. The most recent releases landed on October 13, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 5 level
Endless Runner X versus Kai: the parameters behind the verdict, then further details
ParameterEndless Runner XKai
PriceFreeFree
Rating4.4 (257 ratings)5.0 (4 ratings) — better
Positive reviews85.0% of reviews100.0% of reviews — better
Number of ratings257 — better4
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.011.0
Further details — not scored
Size23 MB85 MB
Age rating4+4+
DeveloperTBD Game CompanySuper Unlimited Inc.

Customer experience

Endless Runner X

All ratings257 ratings
Positive82.5%
Neutral6.2%
Negative11.3%
Written reviews127 reviews
Positive85.0%
Neutral6.3%
Negative8.7%

Kai

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Endless Runner X

Reported bugs

3 issues
  • Game crashes on certain levels
  • Jumping/controls not responsive at times
  • Levels resetting progress unexpectedly

Requested features

4 requests
  • More levels and game modes
  • Ability to skip difficult levels
  • Improved controls for certain levels
  • Hint system for harder levels

Kai

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Endless Runner X

One-time1
  • Remove Ads$2.99
None

Kai

No in-app purchases

Questions

Is Endless Runner X free?
Endless Runner X is free to download, with in-app purchases available.
Is Kai free?
Kai is free to download, with no in-app purchases.
Which has better reviews, Endless Runner X or Kai?
Kai is rated higher. Endless Runner X averages 4.4 out of 5 from 257 ratings, while Kai averages 5.0 from 4 ratings.
Do Endless Runner X or Kai have ads?
Both Endless Runner X and Kai show ads.
Which is updated more often, Endless Runner X or Kai?
Endless Runner X ships an update every 6 weeks, and Kai every 2 months. Most recently, Endless Runner X was updated on October 13, 2026 and Kai on September 24, 2026.

Other comparisons