Comparison

Underisland vs Rocket Betsy

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

Head to head
About

Underisland

Features
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Descend into the Skull Cave. Claim the Artifact. Survive the Unknown. Welcome to a magical island shrouded in mystery and danger. At its heart lies an enormous cave carved in the shape of a colossal skull โ€” an ancient place whispered about in legends. Deep within it rests a powerful artifact with unknown properties, capable of changing the fate of the world. You are the only one brave enough to enter. Prepare for a fast-paced roguelike action adventure where every run is different, every decision matters, and survival is never guaranteed. Roguelike Action at Its Core Each expedition into the Skull Cave is a unique experience. Enemies, skills, and challenges change every run, forcing you to adapt, experiment, and master the chaos. Defeat means starting over โ€” but stronger, wiser, and better prepared. โ€” Create Your Own Skill Builds Build your hero your way. Choose from a wide variety of skills during each run and combine them into powerful, creative builds: โ€ข High-damage glass cannons โ€ข Tanky survivors โ€ข Quick miner โ€ข Balanced No two builds are the same, and discovering new synergies is part of the fun. โ€” Mine, Collect, and Grow Stronger Beyond combat, the depths of the Skull Cave hide rich mineral veins and ancient remnants. While exploring the mine, you will gather valuable resources used to upgrade your equipment, enhance your stats, and unlock new possibilities for future runs. Every expedition brings not only danger, but also materials that fuel your long-term progression โ€” making each descent into the cave meaningful, even in defeat. โ€” Upgrade Your Equipment Grow stronger between runs by upgrading your gear. Boost your stats and unlock your true potential. Smart equipment progression is key to surviving deeper, more dangerous arenas. โ€” Multiple Arenas, Unique Enemies Explore diverse arenas hidden within the Skull Cave and across the magical island. Each arena features: โ€ข Distinct visual styles โ€ข Unique enemy types and attack patterns โ€ข Increasing difficulty and new threats Every location feels different and demands a new approach. โ€” Simple Controls, Deep Gameplay Easy to pick up, hard to master. Intuitive one-hand controls let you focus on movement, positioning, and tactical decisions โ€” perfect for quick sessions or long runs alike. โ€” A Mysterious World Awaits What is the artifact hidden deep within the skull-shaped cave? Is it salvationโ€ฆ or destruction? Only those who survive long enough will uncover the truth. โ€” Key Features: โ€ข Fast-paced roguelike gameplay โ€ข Deep skill build customization โ€ข Equipment upgrade and progression system โ€ข Multiple arenas with unique visuals and enemies โ€ข Simple controls with challenging gameplay depth โ€ข Atmospheric fantasy setting on a magical island โ€” Privacy policy: https://rusetidan.github.io/privacy-policy/ Terms of use: https://rusetidan.github.io/terms-of-use/

About

Rocket Betsy

Features
Read full description

The aliens picked the wrong farm. When the herd was abducted, one brave cow decided sheโ€™d had enough of being ground-bound. Strap into a flight suit held together by scrap metal, milk crates, and sheer determination. Itโ€™s time for the ultimate vertical rescue mission! ENDLESS ASCENT The higher you fly, the weirder it gets. The galaxy is a very strange place for a cow. How high can you go? UPGRADE YOUR SUIT Fly in style. Collect coins to swap that "DIY Junk-Jet" for a shimmering, high-tech flight suit. Turn rusty buckets into galactic-grade armor! EQUIP GADGETS Only the finest bovine technology. Shield yourself with the Moo-flector or store massive power in the Milk Capacitor. Who says farm animals canโ€™t do rocket science? BEAT YOUR BEST SCORE The steaks have never been higher! Dodge alien blockades and ships, and show those UFOs that they can't out-fly a cow on a mission. OPTIMIZED FOR MOBILE - PLAY OFFLINE: No internet? No problem. Rescue the herd anywhere, from the subway to the moon. - LIGHTWEIGHT: A small file size means more room for your space adventures! - LIGHTNING FAST: Zero wait times. Get from the farm to the stars in seconds.

Screenshots

Underisland4 screens
Rocket Betsy4 screens

Verdict

The call

The clearest difference is update cadence: Underisland at every 4 days against Rocket Betsy's every 8 days. 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Underisland sells 10 in-app purchases, starting at $4.99 per 7 days and Rocket Betsy sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Underisland ships an update every 4 days, Rocket Betsy every 8 days. The most recent releases landed on October 28, 2026 and October 30, 2026 respectively.

Scorecard1 real difference ยท 5 level
Underisland versus Rocket Betsy: the parameters behind the verdict, then further details
ParameterUnderislandRocket Betsy
PriceFreeFree
Update frequencyEvery 4 days โ€” betterEvery 8 days
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details โ€” not scored
Size217 MB217 MB
Age rating9+4+
DeveloperRuslan AbdullakhMagmic Inc.

In-app purchases

10 purchases

Underisland

Subscriptions1
  • Legends' Subscription$4.997 Days
One-time9
  • Planks$0.99
  • Planks$3.99
  • Starter Pack$5.99
Show 6 more
  • Pile of Coins$7.99
  • Planks$7.99
  • Ingots$7.99
  • No Ads$9.99
  • Plenty of Magic Threads$19.99
  • Barrel of Gems$19.99
6 purchases

Rocket Betsy

One-time6
  • Gem Pack 1$2.99
  • Remove Ads - Sale$2.99
  • Remove Ads$3.99
Show 3 more
  • Gem Pack 2$6.99
  • Gem Pack 3$12.99
  • Gem Pack 4$24.99

Questions

Is Underisland free?
Underisland is free to download, with in-app purchases available.
Is Rocket Betsy free?
Rocket Betsy is free to download, with in-app purchases available.
Do Underisland or Rocket Betsy have ads?
Both Underisland and Rocket Betsy show ads.
Which is updated more often, Underisland or Rocket Betsy?
Underisland ships an update every 4 days, and Rocket Betsy every 8 days. Most recently, Underisland was updated on October 28, 2026 and Rocket Betsy on October 30, 2026.

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