Comparison

Gravity! vs Physarum

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

Head to head
About

Gravity!

Simulate the forces of gravity by flinging particles and observing their interactions. Create celestial bodies like planets and black holes, and customize their properties. Explore vast cosmic simulations with intuitive zoom and pan controls.

Highlights
  • Gravity simulation
  • Particle interaction
  • Create solar systems
  • Add black holes
  • Adjust particle properties
  • Zoom and pan controls
Features
Read full description

This app simulates the effects of gravity. You can fling particles at each other and watch them interact. Create solar systems and galaxies! Make a planet and fling asteroids into it! Add a black hole and watch everything get sucked in! You can adjust the size, mass, and color of the particles! Zoom in and out and look around with two fingers! App Preview Music: "Mesmerizing Galaxy " Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 4.0 License http://creativecommons.org/licenses/by/4.0/

About

Physarum

Explore the fascinating emergent behavior of slime molds through a visually rich simulation. Adjust agent parameters, influence growth with intuitive controls, and discover complex, mesmerizing patterns.

Highlights
  • Slime mold behavior simulation
  • Autonomous agent control
  • Adjustable agent parameters
  • Maze solving and network formation
  • Vibrant color modes
  • Interactive system manipulation
Read full description

Explore artificial life through a living, flowing simulation inspired by Physarum polycephalum, the slime mold famous for forming networks, solving paths, and showing intelligence without a brain. Physarum turns simple local rules into complex motion. Thousands of agents sense trails, turn, move, and deposit new traces. As the field evolves, branching networks, waves, and organic textures emerge in real time. Use Physarum to: - Tune sensor distance, turn angle, movement, and trail strength - Paint into the field and guide the simulation by touch - Explore chaotic, branching, and self-organizing patterns - Save and restore interesting agents, fields, and rules - Create vivid generative visuals with color controls It is part science toy, part generative art studio, and part meditative visual instrument. Whether you study emergent systems, teach artificial life, or simply enjoy hypnotic motion, Physarum gives you a hands-on way to watch complexity grow from simple behavior.

Screenshots

Gravity!4 screens
Physarum4 screens

Verdict

The call

The clearest difference is rating: Physarum at 4.8 against Gravity!'s 3.9. Physarum also leads on review sentiment (100% vs 74%). Gravity!'s advantage is iOS requirement (15.6 vs 26.0). On price, ratings volume, update cadence and ads 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. Gravity! sells 1 one-off in-app purchase and Physarum sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Physarum holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 18 and 27 respectively. Written reviews point the same way: 74% of Gravity!'s written reviews are positive against 100% of Physarum's.

UpkeepUpdate frequency

Gravity! ships an update every 2 months, Physarum every 5 weeks. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
Gravity! versus Physarum: the parameters behind the verdict, then further details
ParameterGravity!Physarum
PriceFreeFree
Rating3.9 (18 ratings)4.8 (27 ratings) — better
Positive reviews73.5% of reviews100.0% of reviews — better
Number of ratings1827 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size17 MB32 MB
Age rating4+4+
DeveloperMarc DavisGEORGY OSTROBROD

Customer experience

Gravity!

All ratings18 ratings
Positive72.2%
Neutral5.6%
Negative22.2%
Written reviews34 reviews
Positive73.5%
Neutral8.8%
Negative17.6%

Physarum

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Gravity!

One-time1
  • Gravity! Extended Edition$0.99
3 purchases

Physarum

One-time3
  • Small developer tip2 variants$1.99
  • Medium developer tip2 variants$3.99
  • Big developer tip2 variants$5.99

Questions

Is Gravity! free?
Gravity! is free to download, with in-app purchases available.
Is Physarum free?
Physarum is free to download, with in-app purchases available.
Which has better reviews, Gravity! or Physarum?
Physarum is rated higher. Gravity! averages 3.9 out of 5 from 18 ratings, while Physarum averages 4.8 from 27 ratings.
Do Gravity! or Physarum have ads?
Neither Gravity! nor Physarum shows ads.
Which is updated more often, Gravity! or Physarum?
Gravity! ships an update every 2 months, and Physarum every 5 weeks. Most recently, Gravity! was updated on October 7, 2026 and Physarum on October 15, 2026.

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