Comparison

Round Pop Bubble vs Fill Sand

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

Head to head
About

Round Pop Bubble

Read full description

Drop bubbles, chain massive combos, and beat your high score in this colorful puzzle game! Every level sets a target score — hit it or you don't move on. Simple? Yes. Easy? Not a chance. As you climb through the levels, the objectives get fiercer and only the sharpest players make it through. One smarter drop. One bigger combo. One level conquered. The board doesn't forgive mistakes — but it rewards brilliance. Adventure Mode Take on 200+ challenging levels, earn stars based on your performance, and progress at your own pace. Each level brings a fresh layout, a new target score, and surprises along the way. Solo or With Friends Round Pop Bubble isn't just a solo adventure — it's a showdown! Challenge a friend on the same device in local multiplayer. Who's got the sharpest eye and the smoothest combos? Now you'll know. How to Play Tap a bubble to highlight a group of matching colors, then tap again to pop them all. The bigger the chain, the bigger the score. Hit the level target to unlock the next stage — and see how far you can go! Features • 200+ Adventure levels with a star progression system • Classic and Quick modes for any session length • Local multiplayer on the same device • Special bubbles that reward clever, strategic plays • Personal best tracker — always something to beat • Bright, cheerful visuals perfect for all ages Beat Your Best Every game is a chance to top your previous high score. One more drop, one more combo, one more level — Round Pop Bubble keeps you coming back for more!

About

Fill Sand

This physics-based puzzle game challenges you to clear colored sand from a grid. Strategically place blocks to absorb matching grains, causing the remaining sand to collapse and resettle. Uncover colorful pictures by emptying the entire grid before time runs out.

Highlights
  • Real falling-sand physics
  • One-finger drag controls
  • Colorful pictures to uncover
  • Shape and space planning
  • Quick stages
  • Special block types
Features
Read full description

Watch the sand pour. Every single grain moves for real — it falls, it piles, it slides. Drop one block and thousands of colored grains stream in, the picture above breaks apart, and the colors settle somewhere you never planned for. Sand Fill is the oddly satisfying block puzzle where physics does the talking. HOW TO PLAY • Look at the sand picture above — colors, shapes, layers. • Drag a block onto the grid below. • The block drinks up every grain that matches its color. • The rest of the sand collapses and resettles. Read it again. • Empty the whole picture before time runs out. One finger. No tutorial needed. You'll get it in ten seconds. IT'S THE PHYSICS THAT GETS YOU This isn't sand-shaped decoration. Grains fall, stack, avalanche and mix. Clear the red underneath and everything above comes down. Every stage is a little collapse you set off yourself. SPACE IS THE REAL PUZZLE The grid below is small, and blocks come in awkward shapes. Park one badly and you've stolen the room you needed three moves later. Strong players don't place fast — they place last. COLORS DON'T STAY PUT Sand mixes as it falls. That clean band of blue turns speckled halfway down, and now you have to dig for it. Bring your blocks to the sand instead of waiting for the sand to come to you. PUZZLES THAT KEEP CHANGING • Hidden blocks that won't show their color until you clear others • Frozen blocks locked behind ice • Layered blocks hiding a second color underneath • Sliding blocks that travel on one axis only • Locks and keys • A brand-new picture every single stage WHEN YOU'RE STUCK • Freeze — stop the clock and think it through • Hammer — smash one block into single squares and spread them out • Magnet — pull every matching grain straight into one block Save them. You'll want them later. FEATURES • Real falling-sand physics, grain by grain • Simple one-finger drag controls • Colorful pictures to uncover • Shape and space planning that actually matters • Clear goals, quick stages, easy to pick up • No wrong way to start — just drop a block Drop the block. Watch it pour. Clear every grain. Download Sand Fill: Block Puzzle and see how far you can go.

Screenshots

Round Pop Bubble4 screens
Fill Sand4 screens

Verdict

The call

The clearest difference is in-app purchases: Round Pop Bubble at none against Fill Sand's 10. Round Pop Bubble also leads on iOS requirement (13.0 vs 15.0). Fill Sand's advantage is update cadence (every 3 days vs every 2 weeks) and chart position (#105 vs unranked). On price, 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. Fill Sand sells 10 one-off in-app purchases. Round Pop Bubble asks for nothing beyond the download.

UpkeepUpdate frequency

Round Pop Bubble ships an update every 2 weeks, Fill Sand every 3 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

Scorecard4 real differences · 7 level
Round Pop Bubble versus Fill Sand: the parameters behind the verdict, then further details
ParameterRound Pop BubbleFill Sand
PriceFreeFree
Rating—4.7 (805 ratings) — better
Positive reviews—22.4% of reviews
Number of ratings—805 — better
Update frequencyEvery 2 weeksEvery 3 days — better
AdsYesYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
Best chart rank—#105 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.0
Further details — not scored
Size138 MB510 MB
Age rating12+4+
DeveloperHUANG LUCStormborn Inc.

In-app purchases

None

Round Pop Bubble

No in-app purchases

10 purchases

Fill Sand

One-time10
  • Starter Bundle$1.99
  • 1,000 Coins$1.99
  • Fail Offer$4.99
Show 7 more
  • 5,000 Coins$7.99
  • No Ads$7.99
  • Fail Offer 02$8.99
  • Sand Pass$9.99
  • Small Bundle$9.99
  • 10,000 Coins$14.99
  • Fail Offer 03$14.99

Questions

Is Round Pop Bubble free?
Round Pop Bubble is free to download, with no in-app purchases.
Is Fill Sand free?
Fill Sand is free to download, with in-app purchases available.
Do Round Pop Bubble or Fill Sand have ads?
Both Round Pop Bubble and Fill Sand show ads.
Which is updated more often, Round Pop Bubble or Fill Sand?
Round Pop Bubble ships an update every 2 weeks, and Fill Sand every 3 days. Most recently, Round Pop Bubble was updated on November 9, 2026 and Fill Sand on November 10, 2026.

Other comparisons