Comparison

Blockjaw vs Space Crash Simulator

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

Head to head
About

Blockjaw

A unique puzzle game where you control falling blocks using facial expressions. Move pieces by shifting your mouth, rotate by blinking, and increase speed by opening your mouth. Fill rows to clear them in this innovative AR experience.

Highlights
  • Control blocks with facial expressions
  • Move pieces with mouth shifts
  • Rotate pieces by blinking
  • Increase fall speed by opening mouth
  • Clear rows to score points
  • AR capabilities
Features
Read full description

Welcome to Blockjaw: the Falling Blocks puzzle game you play with your face. (° _ •) Move the pieces by shifting your mouth left and right, rotate them by blinking, increase fall speed by opening your mouth, and drop them all the way by sticking out your tongue.* Fill entire rows in order to clear them, but be careful because the speed slowly increases as you play. Keep an eye out for future game modes! (*Game requires a device with facial-recognizing AR capabilities. An alternative AR version of the game will still be playable on devices without facial AR, with limited functionality.)

About

Space Crash Simulator

Experience realistic planetary collisions with a powerful physics engine. Customize your own cosmic events by adjusting particle count, velocity, and accuracy, or jump straight into high-energy impacts. This app offers a detailed, physics-based simulation for educational or entertainment purposes.

Highlights
  • Smoothed Particle Hydrodynamics (SPH) simulation
  • Real-time planetary collisions
  • Customizable simulation parameters
  • Setup Mode for scenario creation
  • Adjustable particle count and accuracy
  • Physics-based detailed simulation
Features
Read full description

Smash worlds together and watch them shatter, merge, and melt, driven by real physics, not pre-made animations. Every planet is made of thousands of interacting particles, so every collision is computed live and no two impacts ever look the same. Build your own scenario in Setup Mode: place up to 8 bodies, set their size, density, spin and velocity, then let gravity do the rest. Or dive straight into a head-on collision and watch the debris glow, cool, and form a crust. - True particle physics (SPH), the first of its kind on mobile - Molten impact zones: heat, lava, and cooling crusts - Give planets rings or shred a moon into one with tidal forces (Roche limit) - Protoplanetary disk and colliding-galaxies modes - Black holes that tear planets apart - Custom planet textures from your own photos - Runs on everything: tune particle count, accuracy, and timescale to your device

Screenshots

Blockjaw4 screens
Space Crash Simulator4 screens

Verdict

The call

The clearest difference is price: Space Crash Simulator at Free against Blockjaw's $0.99. Space Crash Simulator also leads on update cadence (every 5 days vs every 6 weeks) and ratings volume (608 vs 2). Blockjaw's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 1). On 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

Space Crash Simulator is free to download; Blockjaw costs $0.99 up front. Space Crash Simulator sells 1 one-off in-app purchase. Blockjaw asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Blockjaw holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Space Crash Simulator has 608 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Blockjaw's written reviews are positive against 82% of Space Crash Simulator's.

UpkeepUpdate frequency

Blockjaw ships an update every 6 weeks, Space Crash Simulator every 5 days. Both last shipped on October 14, 2026.

Scorecard8 real differences · 2 level
Blockjaw versus Space Crash Simulator: the parameters behind the verdict, then further details
ParameterBlockjawSpace Crash Simulator
Price$0.99Free — better
Rating5.0 (2 ratings) — better4.5 (608 ratings)
Positive reviews100.0% of reviews — better81.8% of reviews
Number of ratings2608 — better
Update frequencyEvery 6 weeksEvery 5 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size4 MB254 MB
Age rating4+4+
DeveloperJ CrowleyWPC

Customer experience

Blockjaw

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

Space Crash Simulator

All ratings608 ratings
Positive86.5%
Neutral6.1%
Negative7.4%
Written reviews297 reviews
Positive81.8%
Neutral7.4%
Negative10.8%

Bugs and requests

Blockjaw

Not enough reviews yet to summarise bugs or requests.

Space Crash Simulator

Reported bugs

2 issues
  • Collision trails not clearing properly
  • Protoplanetary disc mode not working as expected

Requested features

7 requests
  • Add more celestial objects (black holes, stars, etc.)
  • Allow for custom textures and planet/atmosphere customization
  • Improve performance and optimization
  • Add more graphic options and settings
  • Allow for custom rings and moons around planets
Show 2 more
  • Enable free camera feature
  • Improve collision and heating effects

In-app purchases

None

Blockjaw

No in-app purchases

1 purchases

Space Crash Simulator

One-time1
  • Premium$4.99

Questions

Is Blockjaw free?
Blockjaw costs $0.99, with no in-app purchases.
Is Space Crash Simulator free?
Space Crash Simulator is free to download, with in-app purchases available.
Which has better reviews, Blockjaw or Space Crash Simulator?
Blockjaw is rated higher. Blockjaw averages 5.0 out of 5 from 2 ratings, while Space Crash Simulator averages 4.5 from 608 ratings.
Do Blockjaw or Space Crash Simulator have ads?
Space Crash Simulator shows ads; Blockjaw does not.
Which is updated more often, Blockjaw or Space Crash Simulator?
Blockjaw ships an update every 6 weeks, and Space Crash Simulator every 5 days. Most recently, Blockjaw was updated on October 14, 2026 and Space Crash Simulator on October 14, 2026.

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