Comparison

Define Gravity vs DropOS

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

Head to head
About

Define Gravity

Navigate challenging 2D puzzles by manipulating gravity and using a magnetic force. This game offers a unique twist on puzzle-solving with its core mechanics.

Highlights
  • Gravity manipulation
  • Magnetic force mechanics
  • 2D puzzle gameplay
  • Challenging levels
Features
Read full description

Define gravity is a 2D game with a gravity defying twist. Make your way through puzzles by using a magnet and the power of gravity. Developed by Strider Studios Published by Mangum Labs

About

DropOS

Engage in a physics-based puzzle game where you strategically drop marbles into a contraption. Plan the sequence of drops to guide each marble into its matching bin, with each marble's passage altering the machine for the next.

Highlights
  • Physics-based contraption puzzles
  • Strategic marble dropping
  • 100 hand-designed levels
  • Weekly leaderboard
  • Earn in-game cogs
  • Bonus brass pin board
Read full description

A da Vinci workshop, rendered in brass and gravity. In a lantern-lit workshop of brass and walnut, a marble waits at the top of a machine you cannot steer. Drag it into the top funnel and let go. Real gravity takes over, and the marble rolls, tips, and tumbles through the fixed contraption until it lands, ideally, in a bin that matches it. Then look again. Every piece that marble crossed has changed for the marble behind it. You plan the sequence. Physics does the rest. You never steer a marble in flight. You read the machine, then choose the order you drop them in. - The see-saw bit tips one way, then the other. The marble crossing it reroutes the next one. - The rotor does not toggle. It counts forward to its next exit with every pass. - The remote lever throws a switch from across the board. - The waterwheel never stops turning, so timing matters as much as logic. - The felt slows a marble to a crawl. It changes how late a marble arrives, never where it lands. - The wax seal carries the first marble across, then breaks. Every marble behind it drops through. Every marble in a bin that matches it, every bin filled, and the level is solved. A misfire is not a wall. Press the red knob and the machine re-cocks itself, ready for a new order. Walking out on a run already in motion costs your streak, so the machine asks first. What's inside - 100 hand-designed levels, rated one to five in difficulty - One new idea at a time: no two pieces debut on the same board - More waiting deeper in: the gilded marble, the cam tongue, the trapdoor, the pendulum, the drumskin, and the press - A weekly boards leaderboard to climb - Earn cogs as you play and grow your purse - The Cascade, a bonus brass pin board: no randomness in the drop, just physics - Three brass instruments to earn and spend: the Hourglass, the Blueprint, and the Apprentice Built like a puzzle box. Every surface is warm brass, walnut, or aged parchment, and every word is set in EB Garamond, the serif of an old draftsman's manual. Yours to play, quietly. No ads. No sign-in. No ad-tracking or ad-targeting software. DropOS needs no connection to play; anything synced for the leaderboard is anonymous by default. For anyone who loved the marble-drop puzzlers of the late 1990s, and for anyone meeting one for the first time.

Screenshots

Define Gravity4 screens
DropOS4 screens

Verdict

The call

The clearest difference is update cadence: Define Gravity at every 2 days against DropOS's every 6 days. Define Gravity also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, rating, review sentiment and ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Define Gravity against 5.0 for DropOS. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Define Gravity ships an update every 2 days, DropOS every 6 days. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
Define Gravity versus DropOS: the parameters behind the verdict, then further details
ParameterDefine GravityDropOS
PriceFreeFree
Rating5.0 (5 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings5 — better2
Update frequencyEvery 2 days — betterEvery 6 days
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size154 MB28 MB
Age rating4+4+
DeveloperMangumLabs LLCLaunchKitOS

Customer experience

Define Gravity

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DropOS

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Define Gravity

No in-app purchases

None

DropOS

No in-app purchases

Questions

Is Define Gravity free?
Define Gravity is free to download, with no in-app purchases.
Is DropOS free?
DropOS is free to download, with no in-app purchases.
Which has better reviews, Define Gravity or DropOS?
Define Gravity and DropOS are both rated 5.0 out of 5 on the App Store, from 5 and 2 ratings respectively.
Do Define Gravity or DropOS have ads?
Neither Define Gravity nor DropOS shows ads.
Which is updated more often, Define Gravity or DropOS?
Define Gravity ships an update every 2 days, and DropOS every 6 days. Most recently, Define Gravity was updated on October 9, 2026 and DropOS on October 11, 2026.

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