Comparison

Fathom vs Undumb

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

Head to head
About

Fathom

Explore great thinkers and philosophies with bite-sized lessons. Understand complex ideas with elegant visuals and build a daily habit of learning. Access over 50 learning paths on diverse philosophical topics.

Highlights
  • Daily philosophy habit building
  • Bite-sized lessons (under 2 minutes)
  • Elegant visual explanations
  • 50+ learning paths
  • Save and review insights
  • Set learning goals
Features
Read full description

Fathom is your guide to the world's most great thinkers and philosophies. - Build your foundational knowledge in one of humanity’s original disciplines. From Socrates to Descartes and from Buddhism to Existentialism take the time to truly understand how some of the world’s wisest people think. - Understand complex concepts quickly, with elegant visuals that clarify key ideas and help you stay focused. - Learn on your schedule. Knock out a lesson in two minutes or less, in bite-sized sessions designed to fit into your week no matter what life throws your way. - Set a learning goal and embark on a multi lesson learning paths into specific philosophies and philosophers - Actually refer back to wisdom when you need it most. Save and review the insights and visuals that matter most to you Explore our rapidly expanding catalog, featuring 50+ learning paths such as: -Buddhist Wisdom for Anxious Minds -Socrates and Plato -Aristotle -Hedonism, Cynicism, Stoicism -Utilitarianism and Kantian Ethics -Kant’s Epistemology -Kierkegaard -Feminist Philosophy and Perspectives on Power -Camus ...and much more! -- SUBSCRIPTION PRICING AND TERMS: Fathom offers an auto-renewing yearly subscription and an auto-renewing monthly subscription which allows you full access to all of the content in our catalog for as long as you maintain an active subscription. These prices are for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on your country. Payment will be charged to the credit card connected to your iTunes account at the time of initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24 hours prior to the end of the current period end date, and the cost of the renewal will be listed. You can manage your subscription and auto-renewal can be turned off by going to your Account Settings after the purchase. Read more about our Privacy Policy here: https://tinyurl.com/4a5p4z8b Read more about our Terms of Service here: https://tinyurl.com/xnmcrbvp

About

Undumb

This app offers daily brain workouts designed to enhance creativity, critical thinking, and focus, especially for those using AI tools regularly. It provides hand-crafted puzzles to combat 'AI-brain-drain' and helps users track their cognitive progress.

Highlights
  • Daily brain workouts
  • Enhances creativity
  • Improves critical thinking
  • Boosts focus
  • Cognitive profile tracking
  • Progress trending over time
Features
Read full description

Undumb is a short daily workout backed by a Harvard-educated forensic psychiatrist to keep your brain sharp when using AI regularly. Workouts help with creativity, critical thinking, and focus. We built Undumb because hard thinking is a skill worth practicing. In the modern workplace, AI tools can make work faster and are often becoming required by employers. We still want to read carefully, notice weak evidence, make our own calls, and explain what we think but the modern pace of work with AI doesn't always allow for that. Undumb offers short daily questions that help anyone deliberately train the parts of their brain that over-using AI impacts. Think of these puzzles as a workout or gym routine for your brain. Each puzzle is hand crafted with intention to help people experiencing AI-brain-drain. Your first seven workouts are free. Complete Workout 7 to unlock your Cognitive Profile, with starting scores for Creativity, Critical thinking, and Focus. As you progress further, you can see how your scores are trending over time. Membership unlocks new daily workouts after Workout 7. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Fathom4 screens
Undumb4 screens

Verdict

The call

The clearest difference is monetization model: Undumb at freemium against Fathom's subscription. Undumb also leads on ads (none vs shown) and rating (5.0 vs 4.8). Fathom's advantage is ratings volume (507 vs 3). On price, update cadence, 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

Both are free to download. Fathom sells 8 in-app purchases, starting at $6.99 per month and Undumb sells 2 in-app purchases, starting at $5.00 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Undumb holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Fathom has 507 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 6 level
Fathom versus Undumb: the parameters behind the verdict, then further details
ParameterFathomUndumb
PriceFreeFree
Rating4.8 (507 ratings)5.0 (3 ratings) — better
Positive reviews69.0% of reviews—
Number of ratings507 — better3
Update frequencyWeeklyWeekly
AdsYesNo — better
In-app purchasesYesYes
MonetizationSubscriptionFreemium — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size191 MB56 MB
Age rating12+4+
DeveloperPolywise, Inc.FigLantern LLC

Customer experience

Fathom

All ratings503 ratings
Positive96.2%
Neutral1.8%
Negative2.0%
Written reviews29 reviews
Positive69.0%
Neutral3.4%
Negative27.6%

Undumb

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Fathom

Reported bugs

2 issues
  • Unexpected charges during free trial period
  • Potential issues with app functionality and compatibility

Requested features

3 requests
  • Option to customize or revisit philosopher selections
  • More information about the app's algorithm and learning progression
  • Ability to explore a wider range of philosophical perspectives

Undumb

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Fathom

Subscriptions8
  • Monthly Subscription$6.991 Month
  • Premium Monthly Subscription$12.991 Month
  • Yearly Subscription (no trial)$49.991 Year
Show 5 more
  • Yearly Subscription7 Days trial$49.991 Year
  • Yearly Subscription (Premium)7 Days trial$59.991 Year
  • Yearly Access Premium No Trial$59.991 Year
  • Yearly Sub Premium No Trial$69.991 Year
  • Yearly Subscription Premium7 Days trial$69.991 Year
2 purchases

Undumb

Subscriptions2
  • Undumb Monthly$5.001 Month
  • Undumb Annual$30.001 Year

Questions

Is Fathom free?
Fathom is free to download, with in-app purchases available.
Is Undumb free?
Undumb is free to download, with in-app purchases available.
Which has better reviews, Fathom or Undumb?
Undumb is rated higher. Fathom averages 4.8 out of 5 from 507 ratings, while Undumb averages 5.0 from 3 ratings.
Do Fathom or Undumb have ads?
Fathom shows ads; Undumb does not.
Which is updated more often, Fathom or Undumb?
Fathom ships an update weekly, and Undumb weekly. Most recently, Fathom was updated on October 24, 2026 and Undumb on October 18, 2026.

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