Comparison

FlashToPass vs HudsonAlpha iCell

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

Head to head
About

FlashToPass

Master math facts with interactive flashcards. Reinforce concepts, practice addition for free, and unlock more operations and customization through in-app purchases. Supports dark mode and offers printable exports.

Highlights
  • Interactive math flashcards
  • Addition practice (free)
  • Customizable card sets
  • Printable exports
  • Modern design with dark mode
  • Practice by number and difficulty
Features
Read full description

Help your child master math facts and times tables. FlashToPass: Math Flash Cards is a simple, effective way for kids to practice addition, subtraction, multiplication, and division. Version 3.0 is a complete rebuild with a fresh design, live races with friends, voice answers, camera grading for printed worksheets, and an Apple Watch app. The Mac app is now included too. Made for kids ages 6 to 8 and for anyone still building fact fluency, at home, in homeschool, or as a classroom supplement. No ads, no accounts, no tracking. Addition card sets are completely free, and so is printing. - Practice Their Way - - Type answers on a big, kid-friendly keypad. - Say answers out loud: turn on Listen and the card fills the screen. - Turn on Speak and the app reads each problem aloud. - Drill the times tables by number, 1 through 12, or practice by difficulty. - Build custom card sets for exactly the facts your child needs. - Pick up where you left off, and set practice reminders to build a daily habit. - Race Your Friends - Compete in live head-to-head races over local Wi-Fi: two kids at the kitchen table, or a whole classroom at once. Everyone gets the same cards, and the results screen shows who finished first. Joining a race is always free. - Paper, Too - Print practice sheets or cut-out flash cards for any operation and number range, on US Letter or A4, with an optional answer key and name and score lines on the page. Printing is free for everyone. When the finished sheet comes back, point your camera at it. FlashToPass reads the QR code, recognizes the handwriting, and marks each answer. Grading happens on your device, and nothing is uploaded. - iPhone, iPad, Mac, and Apple Watch - One app runs on all of them, and your purchase covers every device. On Apple Watch, kids answer with the Digital Crown. - Key Features - - NEW! Live head-to-head races over local Wi-Fi. Joining is always free. (*) - NEW! Scan & Grade: camera grading for printed practice sheets. (*) - NEW! Voice answers in 12 languages, plus a read-aloud mode. - NEW! Apple Watch app with Digital Crown input. - NEW! The Mac app is now included. - NEW! Completely redesigned, with sidebar layouts on iPad. - NEW! Free printing for everyone: worksheets and flash card sheets for any set. Print with AirPrint®. - Practice addition math facts completely free. - Times tables practice to build multiplication speed. (*) - Subtraction, multiplication, and division card sets. (*) - Practice by number or by difficulty. (*) - Custom card sets. (*) - Practice reminders, dark mode, sound effects, and animations. Download FlashToPass: Math Flash Cards today and start building math fact mastery. - Support - Questions, comments, or bugs? Please contact us using the form at https://www.scybot.com/BugReport.php. - Miscellaneous - AirPrint® is a registered trademark of Apple Inc., registered in the U.S. and other countries. - Privacy Policy - Please refer to https://www.scybot.com/flashtopass-privacy.pdf - Terms of Use - Please refer to https://www.scybot.com/terms.html - Plans - Choose Yearly, Monthly, or Lifetime. Each plan unlocks every flash card set, custom card sets for every operation, hosting races with any operation, Scan & Grade score totals, and watermark-free printing. Yearly and Monthly are subscriptions. Lifetime is a one-time purchase, not a subscription. Payment is charged to your Apple Account when you confirm the purchase. Subscriptions renew automatically unless you cancel at least 24 hours before the period ends. Manage or cancel subscriptions in your Apple Account settings. Deleting the app does not cancel a subscription. * Some features require an in-app purchase.

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!

Screenshots

FlashToPass4 screens
HudsonAlpha iCell3 screens

Verdict

The call

The clearest difference is rating: FlashToPass at 4.4 against HudsonAlpha iCell's 3.0. FlashToPass also leads on ratings volume (934 vs 296). HudsonAlpha iCell's advantage is in-app purchases (none vs 3) and update cadence (every 4 weeks vs every 4 months). On price, review sentiment, ads 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

Both are free to download. FlashToPass sells 3 in-app purchases, starting at $1.99 per month. HudsonAlpha iCell asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FlashToPass holds the better App Store score, 4.4 against 3.0. Both are backed by a comparable volume of ratings — 934 and 296 respectively. Written reviews complicate that: 67% of FlashToPass's written reviews are positive against 70% of HudsonAlpha iCell's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

FlashToPass ships an update every 4 months, HudsonAlpha iCell every 4 weeks. The most recent releases landed on November 13, 2026 and November 10, 2026 respectively.

Scorecard6 real differences · 4 level
FlashToPass versus HudsonAlpha iCell: the parameters behind the verdict, then further details
ParameterFlashToPassHudsonAlpha iCell
PriceFreeFree
Rating4.4 (934 ratings) — better3.0 (296 ratings)
Positive reviews66.7% of reviews69.8% of reviews — better
Number of ratings934 — better296
Update frequencyEvery 4 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS26.08.0 — better
Further details — not scored
Size21 MB83 MB
Age rating4+4+
DeveloperScybot Technologies, L.L.C.HudsonAlpha Institute for Biotechnology

Customer experience

FlashToPass

All ratings930 ratings
Positive85.1%
Neutral6.3%
Negative8.6%
Written reviews96 reviews
Positive66.7%
Neutral11.5%
Negative21.9%

HudsonAlpha iCell

All ratings289 ratings
Positive46.4%
Neutral9.7%
Negative43.9%
Written reviews325 reviews
Positive69.8%
Neutral6.8%
Negative23.4%

User reviews

FlashToPass

From 934 App Store ratings

What we love

  • 👍 Great for learning math facts
  • ⏱️ Helpful timer feature
  • 🎓 Useful for practicing math skills
  • 🌟 Engaging and addictive
  • 🎨 Good visual design

Room to improve

  • 🔒 Locked content requires purchase
  • 💰 Ads can be distracting
  • 🐛 Crashes and compatibility issues
  • 🔍 Limited customization options
  • 🕹️ Repetitive gameplay

HudsonAlpha iCell

From 296 App Store ratings

What we love

  • 👍 Helpful for learning about cells
  • 🚀 Great 3D visuals and interactive features
  • 💡 Different levels of complexity for various users
  • 🎓 Useful for students and teachers

Room to improve

  • 🐛 Crashes and stability issues
  • 🔍 Limited content and organelles covered
  • 🤔 Lacking in-depth information and functionality
  • 🙄 Boring and oversimplified for some users

Bugs and requests

FlashToPass

Reported bugs

4 issues
  • Crashes when entering answers
  • Timer not working as expected
  • Compatibility issues with iOS updates
  • Keyboard disappearing during use

Requested features

5 requests
  • Allow setting number of questions
  • Add more difficulty levels
  • Include doubles facts practice
  • Provide detailed performance tracking
  • Improve keyboard layout and functionality

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

In-app purchases

3 purchases

FlashToPass

Subscriptions2
  • All Features, Monthly$1.991 Month
  • Unlock All Features$4.991 Year
One-time1
  • Lifetime Unlock$9.99
None

HudsonAlpha iCell

No in-app purchases

Questions

Is FlashToPass free?
FlashToPass is free to download, with in-app purchases available.
Is HudsonAlpha iCell free?
HudsonAlpha iCell is free to download, with no in-app purchases.
Which has better reviews, FlashToPass or HudsonAlpha iCell?
FlashToPass is rated higher. FlashToPass averages 4.4 out of 5 from 934 ratings, while HudsonAlpha iCell averages 3.0 from 296 ratings.
Do FlashToPass or HudsonAlpha iCell have ads?
Neither FlashToPass nor HudsonAlpha iCell shows ads.
Which is updated more often, FlashToPass or HudsonAlpha iCell?
FlashToPass ships an update every 4 months, and HudsonAlpha iCell every 4 weeks. Most recently, FlashToPass was updated on November 13, 2026 and HudsonAlpha iCell on November 10, 2026.

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