Comparison

HudsonAlpha iCell vs PhET Simulations

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

Head to head
About

HudsonAlpha iCell

Explore the inner workings of animal, plant, and bacteria cells in a 3D interactive environment. Tap on cellular components to learn their names and functions. Rotate and zoom to get a comprehensive understanding of cellular biology.

Highlights
  • 3D interactive cell models
  • Animal, plant, and bacteria cell examples
  • Tap to select and learn organelle functions
  • Rotate and zoom functionality
  • Adjustable text size and description levels
Features
Read full description

***Updated 3.6.1*** iCell now works even better on the iPhone. We have added larger text for all descriptions and included the ability to change text description levels for the iPhone as well as the iPad. iCell gives students, teachers, and anyone interested in biology a 3D view inside a cell. Included are examples of three types of cells: animal, plant, and bacteria. Learn about the various parts of the cell, which biologists, biochemists, and DNA researchers at the HudsonAlpha Institute study and use to advance the limits of biotechnology. You can use your finger to tap on parts of the cell to select and zoom in on that particular organelle. Each organelle comes with a name and a short description of its function in the cell. For a better view of each cell, hold down one finger on the screen, and drag to rotate around the cell or selected organelle. You can zoom in and out by pinching or flaring with two fingers at once. We hope you enjoy!

About

PhET Simulations

Explore science and math concepts through interactive simulations. This app provides over 75 HTML5 simulations for learning about atoms, energy, multiplication, and more. It's ideal for students, parents, and educators, offering offline access and multiple language support.

Highlights
  • Interactive science and math simulations
  • Offline play capability
  • Multiple language support
  • Customizable favorites collection
  • Automatic simulation updates
  • Easy simulation sorting
Features
Currently charting
Read full description

Engage in learning science and math with the award-winning PhET simulations! Whether understanding atoms, exploring energy, or mastering multiplication, there is a sim for every learner. Perfect for at home, in class, or on the road, this app delivers all PhET HTML5 sims (over 75 sims) in one easy-to-use package. Developed by experts at the University of Colorado Boulder, PhET sims are used by millions of students every year. The PhET iPad app delivers these exclusive features: • Offline play: learn on the bus or at the park without a WiFi connection. • Multiple languages: app translate in many languages (great for bilingual learners). • Favorites: pick your favorite sims and create your own custom collection. • Automatic updates: get the latest HTML5 sims as soon as they are released. • Easy sorting: find the right sims for you. • Fullscreen: maximize your screen real estate for optimal sim exploration. PARENTS: Engage your child in science and math discovery. TEACHERS: Your favorite HTML5 sims at your fingertips, even without internet access. ADMINISTRATORS: Optimized for school use, so your teachers will be seamlessly up to date. STUDENTS: Tell your parents there’s an exciting app for learning science and math. Note: The app does not include PhET’s Java or Flash sims. In addition, although we are currently working on improving the accessibility of our sims, most of the sims included in this app do not include keyboard navigation or screen reader access. As accessible sims become available, they will be updated within the app. Proceeds from the app support the development of more HTML5 sims. On behalf of the PhET team and the students whose lives you have helped improve — Thank you!

Screenshots

HudsonAlpha iCell3 screens
PhET Simulations3 screens

Verdict

The call

The clearest difference is price: HudsonAlpha iCell at Free against PhET Simulations's $0.99. HudsonAlpha iCell also leads on update cadence (every 4 weeks vs every 14 months) and ratings volume (294 vs 48). PhET Simulations's advantage is rating (4.5 vs 3.0) and chart position (#20 vs unranked). On review sentiment, 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

HudsonAlpha iCell is free to download; PhET Simulations costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PhET Simulations holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: HudsonAlpha iCell has 294 ratings behind it against 48, so its average is the more settled of the two. Written reviews complicate that: 70% of HudsonAlpha iCell's written reviews are positive against 66% of PhET Simulations's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

HudsonAlpha iCell ships an update every 4 weeks, PhET Simulations every 14 months. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.

Scorecard7 real differences · 4 level
HudsonAlpha iCell versus PhET Simulations: the parameters behind the verdict, then further details
ParameterHudsonAlpha iCellPhET Simulations
PriceFree — better$0.99
Rating3.0 (294 ratings)4.5 (48 ratings) — better
Positive reviews69.8% of reviews — better65.5% of reviews
Number of ratings294 — better48
Update frequencyEvery 4 weeks — betterEvery 14 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#20 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size83 MB125 MB
Age rating4+4+
DeveloperHudsonAlpha Institute for BiotechnologyUniversity of Colorado Boulder

Customer experience

HudsonAlpha iCell

All ratings289 ratings
Positive46.4%
Neutral9.7%
Negative43.9%
Written reviews324 reviews
Positive69.8%
Neutral6.8%
Negative23.5%

PhET Simulations

All ratings49 ratings
Positive87.8%
Neutral0.0%
Negative12.2%
Written reviews145 reviews
Positive65.5%
Neutral4.1%
Negative30.3%

Bugs and requests

HudsonAlpha iCell

Reported bugs

3 issues
  • Frequent crashes and app instability
  • Compatibility issues with newer iOS versions
  • Missing or incorrectly labeled organelles

Requested features

4 requests
  • Add more cell types (e.g. fungi, virus)
  • Provide quizzing and assessment features
  • Improve level of detail and explanations
  • Allow users to explore cell structures in more depth

PhET Simulations

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

HudsonAlpha iCell

No in-app purchases

None

PhET Simulations

No in-app purchases

Questions

Is HudsonAlpha iCell free?
HudsonAlpha iCell is free to download, with no in-app purchases.
Is PhET Simulations free?
PhET Simulations costs $0.99, with no in-app purchases.
Which has better reviews, HudsonAlpha iCell or PhET Simulations?
PhET Simulations is rated higher. HudsonAlpha iCell averages 3.0 out of 5 from 294 ratings, while PhET Simulations averages 4.5 from 48 ratings.
Do HudsonAlpha iCell or PhET Simulations have ads?
Neither HudsonAlpha iCell nor PhET Simulations shows ads.
Which is updated more often, HudsonAlpha iCell or PhET Simulations?
HudsonAlpha iCell ships an update every 4 weeks, and PhET Simulations every 14 months. Most recently, HudsonAlpha iCell was updated on October 23, 2026 and PhET Simulations on October 26, 2026.

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