Human Heroes Einstein’s Clock vs Einstein's Relativity
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- 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
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**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.
Einstein's Relativity
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Step into the world of 'Einstein's Relativity' and embark on a stellar journey to decode the intricacies of the most celebrated theory in science. Features: Interactive Einstein: Journey through relativity with Einstein himself, presented as your animated 3D guide. Let his genius illuminate your path! The Twin Paradox Adventure: Join twins Hans and Eduard on a space odyssey that showcases the mesmerizing effects of time dilation. Eduard's voyage to Alpha Centauri and back will astonish you as you witness the age-defying consequences of near-light-speed travel. Gravitational Time Mastery: Command a lift and observe Gravitational Time Dilation. As the lift ascends and descends, witness the clock's rhythm change in sync with gravity's pull. Rocket's Relativistic Ride: Steer a rocket nearing the speed of light. Discover how velocity affects time, but caution! Surpassing light speed creates a singularity! Experience Length Contraction: As you venture near the speed of light, see objects shorten in their direction of motion. It's Einstein's universe, and you're witnessing its wonders! Einstein's Relativity offers more than just games. It's an enlightening experience where the effects of time dilation and length contraction are brought to life. Whether you're a science enthusiast or just starry-eyed about space, this app promises a cosmic education like no other.
Screenshots
Verdict
The clearest difference is in-app purchases: Human Heroes Einstein’s Clock at none against Einstein's Relativity's 2. Human Heroes Einstein’s Clock also leads on update cadence (every 2 months vs every 24 months). On price, ads, 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
Both are free to download. Einstein's Relativity sells 2 one-off in-app purchases. Human Heroes Einstein’s Clock asks for nothing beyond the download.
Human Heroes Einstein’s Clock ships an update every 2 months, Einstein's Relativity every 24 months. The most recent releases landed on July 29, 2026 and February 21, 2026 respectively.
| Parameter | Human Heroes Einstein’s Clock | Einstein's Relativity |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (32 ratings) — better | — |
| Positive reviews | 82.8% of reviews | — |
| Number of ratings | 32 — better | — |
| Update frequency | Every 2 months — better | Every 24 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 183 MB | 322 MB |
| Age rating | 4+ | 4+ |
| Developer | Human Heroes Ltd | Human Heroes Ltd |
In-app purchases
Human Heroes Einstein’s Clock
No in-app purchases
Einstein's Relativity
- The Sensation of Seconds$0.99
- The Cadence Of Clocks$0.99
Questions
Is Human Heroes Einstein’s Clock free?
Is Einstein's Relativity free?
Do Human Heroes Einstein’s Clock or Einstein's Relativity have ads?
Which is updated more often, Human Heroes Einstein’s Clock or Einstein's Relativity?
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