Comparison

Powder Game vs Human Heroes Einstein’s Clock

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

Head to head
About

Powder Game

Explore a physics sandbox where you can simulate the interactions of various elements like water, fire, and gunpowder. Witness unique reactions and emergent phenomena as different 'dots' collide and influence each other.

Highlights
  • Physics simulation with powder elements
  • Over 30 different dot variations
  • Simulate element reactions
  • Explosion effects
  • Plant growth simulation
Features
Read full description

Imagine the cool phenomenon when the wind blows the falling leaves. This game physics simulates the phenomenon with powder (dots)! You can choose more than 30 different variations of the dot. Water, fire, oil, gunpowder, metal, seed, birds, Ant and more. The various reactions when in hit with a dot and a dot. The explosion on hit with fire and gunpowder. Trees grow when in hit with the seed and sand.

About

Human Heroes Einstein’s Clock

Learn to tell time with an interactive 3D Albert Einstein, voiced by Stephen Fry. This free app offers 8 levels of clock-reading challenges, with visual and verbal guidance to help children master time concepts. It's an engaging introduction to the Human Heroes educational series.

Highlights
  • Interactive 3D Albert Einstein character
  • Voiced by Stephen Fry
  • 8 levels of clock-reading practice
  • O'Clock, quarter, half, past, and to time concepts
  • On-screen visual and verbal guidance
  • Offline play
Features
Read full description

**Currently supports English language only** Play with history’s greatest minds! Designed alongside education specialists, this app brings back to life the most iconic figure in science: Albert Einstein, voiced by Stephen Fry! Einstein’s Clock is a completely free app with no in-app purchases, no subscriptions or signups and can be played offline, with no internet or Wi-Fi connectivity required. Taught by the creator of the theory of relativity himself, and presented as an interactive 3D character, a dancing, quirky Einstein will be your very own personal tutor guiding you through The Cadence of Clocks, helping you when you struggle, and telling you funny jokes along the way. Move hour and minute hands across 8 different levels and learn how to tell the time in different configurations: O'Clock, quarter and half, and past and to. Tutorials and on-screen guidance allow for children of all abilities to enjoy this educational adventure of a lifetime! Einstein’s Clock is an introduction to the Human Heroes universe, with the full Einstein experience covering relativity, rhythms, pendulums, gravity, Einstein’s fascinating life and so much more in Human Heroes Einstein On Time, available on the App Store today! Features: - A realistic live-show experience: High-quality visuals and dynamic speech system complimenting the luxurious voice performance by Stephen Fry, who recorded dozens of lines for this game! - Master reading the clock: Covering a Key-Stage National Curriculum area - Scaffolding teaching techniques used throughout. You are sure to succeed as Einstein steps in with on-screen visual and verbal help when you struggle. - Travel through time by moving the clock hands backward or forward and witness the effects of time on the succession of day and night. - Learn about different types of clocks. And much more! All facts and figures have been rigorously checked and researched by subject matter experts to ensure scientific, historical and biographical accuracy. About Human Heroes: ‘Einstein’s Clock’ is the third game in a children’s educational app series – “Human Heroes” - Created by edtech startup KalamTech, centred on history’s greatest minds. From the philosophers of ancient Greece to the giants of science, renowned artists, composers, mathematicians, authors, and architects – these inspirational characters are brought back to life in a futuristic theatrical setting to perform a captivating live-show experience covering their life and their famous discoveries. Forthcoming apps will explore the legacies of Leonardo da Vinci, Isaac Newton, Mozart, Ada Lovelace, Aristotle, Jane Austen and many more.

Screenshots

Powder Game4 screens
Human Heroes Einstein’s Clock3 screens

Verdict

The call

The clearest difference is ads: Human Heroes Einstein’s Clock at none against Powder Game's shown. Human Heroes Einstein’s Clock also leads on monetization model (free vs ad-supported). Powder Game's advantage is ratings volume (2.2K vs 35). On price, rating, review sentiment and update cadence 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 — 4.5 for Powder Game against 4.6 for Human Heroes Einstein’s Clock. That said, the two scores are not equally well evidenced: Powder Game has 2.2K ratings behind it against 35, so its average is the more settled of the two. Written reviews are what separate them: 85% of Powder Game's written reviews are positive against 83% of Human Heroes Einstein’s Clock's.

UpkeepUpdate frequency

Powder Game ships an update every 6 weeks, Human Heroes Einstein’s Clock every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Powder Game versus Human Heroes Einstein’s Clock: the parameters behind the verdict, then further details
ParameterPowder GameHuman Heroes Einstein’s Clock
PriceFreeFree
Rating4.5 (2.2K ratings)4.6 (35 ratings) — better
Positive reviews84.5% of reviews — better82.8% of reviews
Number of ratings2.2K — better35
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.1 — better
Further details — not scored
Size48 MB183 MB
Age rating4+4+
DeveloperDAN-BALLHuman Heroes Ltd

Customer experience

Powder Game

All ratings2,144 ratings
Positive88.8%
Neutral4.3%
Negative6.9%
Written reviews524 reviews
Positive84.5%
Neutral7.6%
Negative7.8%

Human Heroes Einstein’s Clock

All ratings32 ratings
Positive84.4%
Neutral9.4%
Negative6.3%
Written reviews29 reviews
Positive82.8%
Neutral3.4%
Negative13.8%

Bugs and requests

Powder Game

Reported bugs

4 issues
  • View feature not working as expected
  • Occasional freezing or crashing
  • Inconsistent player/fighter behavior
  • Saved creations sometimes disappearing

Requested features

6 requests
  • Add more elements and materials
  • Increase pixel/dot limit or make it unlimited
  • Implement a save/load system for creations
  • Add more player/fighter customization options
  • Introduce new gameplay modes or challenges
Show 1 more
  • Improve visibility of glass and other transparent elements

Human Heroes Einstein’s Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Powder Game

No in-app purchases

None

Human Heroes Einstein’s Clock

No in-app purchases

Questions

Is Powder Game free?
Powder Game is free to download, with no in-app purchases.
Is Human Heroes Einstein’s Clock free?
Human Heroes Einstein’s Clock is free to download, with no in-app purchases.
Which has better reviews, Powder Game or Human Heroes Einstein’s Clock?
Human Heroes Einstein’s Clock is rated higher. Powder Game averages 4.5 out of 5 from 2.2K ratings, while Human Heroes Einstein’s Clock averages 4.6 from 35 ratings.
Do Powder Game or Human Heroes Einstein’s Clock have ads?
Powder Game shows ads; Human Heroes Einstein’s Clock does not.
Which is updated more often, Powder Game or Human Heroes Einstein’s Clock?
Powder Game ships an update every 6 weeks, and Human Heroes Einstein’s Clock every 2 months. Most recently, Powder Game was updated on October 29, 2026 and Human Heroes Einstein’s Clock on October 24, 2026.

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