Comparison

Darwin Speaks vs Rachel Carson

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

Head to head
About

Darwin Speaks

Engage in an interactive interview with a virtual Charles Darwin, brought to life through synthetic interview technology. Explore his life, theories of evolution, and the public's reaction, with modern commentary from experts.

Highlights
  • Interactive interview with virtual Charles Darwin
  • Explore evolution principles and Darwin's life
  • Modern commentary from biology and other experts
  • Answers based on Darwin's writings and letters
  • Questions compiled from user interviews
Features
Read full description

Charles Darwin, the naturalist, geologist, and leading contributor to the fundamental principles of Evolution, comes alive through synthetic interview technology. Duquesne University biology professor John Pollock collaborated with Carnegie Mellon University's Entertainment Technology Center (creator of the Synthetic Interview technology) to develop an interactive experience in which users to select from a list of questions to ask the virtual Darwin, portrayed by Pittsburgh actor and Carnegie Mellon drama alumnus Randy Kovitz. Questions cover Darwin's adventures, the principles of evolution, the public response to his discovery, his childhood, personal quirks and a number of other topics. More than a dozen modern-day biologists, religious authorities, an ACLU lawyer and other experts provide modern commentary and answer questions beyond Darwin's 19th century knowledge. Questions to be answered by Darwin have been drawn from more than 1,000 interviews with K-12 students and adults that were distilled into the 199 most frequently asked questions. Answers to these questions, compiled by Dr. David Lampe, are in Darwin’s own words; drawn from a considerable body of Darwin’s writings, including his notes, books, autobiography, and the thousands of Darwin’s personal letters available through the Darwin Correspondence Project. Principal Funding from the National Institutes of Health/Science Education Partnership Awards (SEPA) and the John Templeton Foundation. For more information about other evolution education tools visit: www.sepa.duq.edu/darwin/education Please Note: This is a large application. App download may take a few minutes depending on internet speeds. Privacy Policy: https://dynamoid.com/privacy/Darwin+Speaks

About

Rachel Carson

Features
Read full description

With this app students learn about the life and contributions to environmental awareness and science made by Rachel Carson. It discusses the work that Rachel Carson did to help people realize that dangers of widespread use of pesticides. Rachel Carson from an early age had an interest in writing. She was born in Springdale, Pennsylvania in 1907. As a young girl Rachel loved walking in the woods around her town in Western Pennsylvania. She developed a deep appreciation for the wonders of the natural world. She also loved to write. When she was only 11 years old she entered and won first place in a writing contest. Rachel Carson began her college career focused on getting a degree in English and was hoping to become a teacher. During her second year of college at the Pennsylvania College for Women (now, Chatham University) Rachel changed her plans and pursued a degree in biology. Eventually Rachel worked for various government agency where she studied the natual environment with an emphasis on the health and well-being of fish and wildlife. Students will enjoy using this graphically illustrated, interactive learning tool. The timeline feature presents key events in the development of our modern understanding of ecology. By tapping on timeline points brings up descriptions of historically significant events and the role the Rachel Carson played in launcing the environmental movement. A quiz function helps students demonstrate their comprehension of the reading material. Key science concepts are shown in colorful illustrations. We hope this app will inspire students to study biological sciences and also remember the importance of protecting the environment. The app shows that Rachel Carson certainly deserves the place she has earned in the history of the environmental movement.

Screenshots

Darwin Speaks3 screens

Verdict

The call

The clearest difference is price: Darwin Speaks at Free against Rachel Carson's $1.99. Darwin Speaks also leads on iOS requirement (12.0 vs 15.6). Rachel Carson's advantage is update cadence (every 26 months vs every 51 months). On ads, in-app purchases and device support 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

Darwin Speaks is free to download; Rachel Carson costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Darwin Speaks ships an update every 51 months, Rachel Carson every 26 months. The most recent releases landed on October 24, 2026 and September 27, 2026 respectively.

Scorecard3 real differences · 7 level
Darwin Speaks versus Rachel Carson: the parameters behind the verdict, then further details
ParameterDarwin SpeaksRachel Carson
PriceFree — better$1.99
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 51 monthsEvery 26 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPad, Mac, Apple TV
Requires iOS12.0 — better15.6
Further details — not scored
Size1.2 GB36 MB
Age rating4+4+
DeveloperDynamoid, LLCVentura Educational Systems

In-app purchases

None

Darwin Speaks

No in-app purchases

None

Rachel Carson

No in-app purchases

Questions

Is Darwin Speaks free?
Darwin Speaks is free to download, with no in-app purchases.
Is Rachel Carson free?
Rachel Carson costs $1.99, with no in-app purchases.
Do Darwin Speaks or Rachel Carson have ads?
Neither Darwin Speaks nor Rachel Carson shows ads.
Which is updated more often, Darwin Speaks or Rachel Carson?
Darwin Speaks ships an update every 51 months, and Rachel Carson every 26 months. Most recently, Darwin Speaks was updated on October 24, 2026 and Rachel Carson on September 27, 2026.

Other comparisons