Comparison

Ninja Star Dojo vs Gem Digger

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

Head to head
About

Ninja Star Dojo

Engage in fast-paced action by selecting a ninja and launching stars to destroy approaching balls. Match colors for powerful combos and high scores across 25 challenging levels. Enjoy retina-quality graphics and custom soundtracks.

Highlights
  • 3 Ninja characters
  • 25 action-packed levels
  • Color matching combos
  • Retina quality graphics
  • Custom sound tracks
  • Unlockable content through gameplay
Features
Read full description

Ninja Star Dojo is a great pick up and play action game! Select one of 3 Ninjas and throw deadly ninja stars to blast away the balls as they approach your base. Match colors to create massive destructive combos for huge scores! Features: ** 25 Action packed and challenging levels ** Universal App supporting all recent iPhone, iPad and iPod touch models ** Beautiful retina quality graphics ** Top notch custom sound tracks ** 100% Free -- All items and levels can be easily unlocked through gameplay only. Check it out today!

About

Gem Digger

Features
Read full description

Dig into a collapsing cave, grab your gem quota, and reach the exit before the clock runs out. One wrong dig and a boulder lands on your head. Gem Digger is a boulder-physics puzzle game in the classic cave-arcade tradition. The first world and unlimited Endless runs are free; three more worlds are one-time unlocks. Rocks and gems fall and roll by rules you can learn, so a cave is something you solve, not something you grind. FREE, WITH NO TIMERS • Dirt Mines: 60 handcrafted caves • Endless mode: unlimited generated caves, free forever, each one checked against a solver before it is served • No energy meters and no lives to wait out, in the free worlds and the paid ones alike MECHANICS TO MASTER • Drop a boulder on a butterfly and it bursts into the gems you need • Wall the amoeba in and it turns to gems; let it sprawl and it turns to rock • Magic walls turn falling boulders into gems, but not for long • Outsmart fireflies, and learn slime and the falling-rock rules • Chase three stars on every cave; the third one needs a clear under par THREE MORE WORLDS Crystal Caves, Magma Depths and Frozen Hollow add 45 caves each. Each is a one-time in-app purchase, or take all three at once. No subscription, no consumables, nothing expires, and a single purchase restores across your devices. Built for touch: swipe anywhere or use the on-screen pad. Landscape, and it plays offline. Gem Digger shows ads between runs. A one-time Remove Ads purchase turns them off.

Screenshots

Ninja Star Dojo3 screens
Gem Digger4 screens

Verdict

The call

The clearest difference is in-app purchases: Ninja Star Dojo at none against Gem Digger's 6. Ninja Star Dojo also leads on ads (none vs shown). Gem Digger's advantage is update cadence (every 3 months vs every 119 months). On price, device support and iOS requirement 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. Gem Digger sells 6 one-off in-app purchases. Ninja Star Dojo asks for nothing beyond the download.

UpkeepUpdate frequency

Ninja Star Dojo ships an update every 119 months, Gem Digger every 3 months. The most recent releases landed on September 7, 2026 and September 24, 2026 respectively.

Scorecard3 real differences · 7 level
Ninja Star Dojo versus Gem Digger: the parameters behind the verdict, then further details
ParameterNinja Star DojoGem Digger
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 119 monthsEvery 3 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size49 MB52 MB
Age rating9+4+
DeveloperBrian TEETERSeif Ibrahim

In-app purchases

None

Ninja Star Dojo

No in-app purchases

6 purchases

Gem Digger

One-time6
  • Crystal Caves$2.99
  • Magma Depths$2.99
  • Frozen Hollow$2.99
Show 3 more
  • Remove Ads$3.99
  • Unlock All Worlds$6.99
  • Complete Edition$9.99

Questions

Is Ninja Star Dojo free?
Ninja Star Dojo is free to download, with no in-app purchases.
Is Gem Digger free?
Gem Digger is free to download, with in-app purchases available.
Do Ninja Star Dojo or Gem Digger have ads?
Gem Digger shows ads; Ninja Star Dojo does not.
Which is updated more often, Ninja Star Dojo or Gem Digger?
Ninja Star Dojo ships an update every 119 months, and Gem Digger every 3 months. Most recently, Ninja Star Dojo was updated on September 7, 2026 and Gem Digger on September 24, 2026.

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