Comparison

Learn Facts Quick vs Rondo

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

Head to head
About

Learn Facts Quick

Features
Read full description

This is a well-rounded learning application, fully synced with the same functionality as the website, learnfactsquick.com. It can teach you anything using memory techniques such as the major system and number-to-celebrity system to help remember numbers, a major system generator and anagram generator and a mnemonic generator, a complete acrostic(acronyms of names: EG :LEMUR, an animal from Madagascar , = Large Eyed Madagascar Unmistakable Ringtail) system allowing storage and display and editing of a complete database of knowledge which also include mnemonics and peglists(system to remember both index and item of list based on number to mnemonic to list item association). It includes a mnemonics editing tool to edit mnemonics, peglists, and anagrams of lists you want to remember. The best aspect is the new words system. You can custom design it to review new words you enter everyday, then do your reviews quickly everyday with a few button clicks. The idea is that if you review a new word 5 or 6 times with longer and longer intervals, then you will remember it. It is proven that this is how our brains store things into permanent memory. **CHECK OUT learnfactsquick.com

About

Rondo

Explore the mathematical beauty of numbers through interactive, animated factorization diagrams. Watch numbers dance, hear their unique songs, and even visualize them in augmented reality. Discover the stories behind special numbers and personalize your experience with customizable palettes and sounds.

Highlights
  • Animated factorization diagrams
  • Augmented reality number visualization
  • Auditory representation of factors
  • Interactive number exploration
  • Field Guide for special numbers
  • Home screen and Apple Watch widgets
  • Customizable color palettes and sounds
Features
Read full description

Rondo turns the counting numbers into a quiet, hypnotic dance. Every number from 1 upward is drawn as a factorization diagram: nested rings of colored dots that show, at a glance, how that number is built from its prime factors. 6 is two groups of three. 12 is three groups of four. Primes can't be split, so they shimmer alone. Then the diagram melts and re-forms into the next number, and the next, an endless looping dance of arithmetic. It's equal parts math toy, teaching tool, and ambient art. WATCH, OR EXPLORE • Let it play for a calm, continuous dance from one number to the next • Tap to pause, drag to scrub to any number, or step one at a time • Speed it up, or slow it right down • A gentle haptic tap each time the dance lands on a prime • Follow any number down its Collatz orbit, and watch it fall back to 1 HEAR IT • Every number sings its factorization: a prime is a single pure tone, a composite a chord of its prime factors • On by default, off whenever you like POINT YOUR CAMERA • Aim Rondo at any printed number and watch its diagram bloom over the page, in augmented reality • Summon a number's diagram into the room, then walk around it • Street signs, receipts, book pages: factor the world around you EVERY NUMBER HAS A STORY • Tap any number to see what makes it special: whether it's prime, a perfect number, a power, and more • Collect the special numbers you find in the Field Guide SEE THE MATH • The current number and its factorization, always in view • Full VoiceOver support and a spoken read-out of each number and how it factors • Save the numbers you love to Favorites, and share any diagram as an image ON YOUR HOME SCREEN AND WRIST • Widgets that turn today's date into factorization diagrams, across the Home Screen, Lock Screen, and StandBy • A factorization calendar for the month or the current week • A widget for a number you pin, and a stepper widget you tap to walk one number at a time • An Apple Watch app: scrub through the numbers with the Digital Crown, with the same prime haptics • Ask Siri for a number, or add Rondo to a Shortcut • An optional nudge on days whose number is itself worth a look MAKE IT YOURS WITH RONDO PRO A one-time unlock, never a subscription. The full dance stays free. Pro is for going deeper: • New color palettes, backgrounds, and color styles • Layout options for how the rings nest and order themselves • A living clock face that factors the time • Number sequences: count by multiples, primes only, Fibonacci, and more • The full instrument: tune the scale, voice, and space of the sound • Hear any number's story narrated aloud, in your choice of tone CALM BY DESIGN No ads. No tracking. No account. No subscription. Rondo is free to play, with an optional one-time Pro unlock. A LOVING HOMAGE Rondo is a faithful tribute to Brent Yorgey's factorization diagrams and Stephen Von Worley's animated "Factor Conga," built natively for iPhone, iPad, and Apple Watch. The diagrams honor their work; the sound, the augmented reality, and the stories are Rondo's own. Full credits are in the app.

Screenshots

Learn Facts Quick4 screens
Rondo4 screens

Verdict

The call

The clearest difference is in-app purchases: Learn Facts Quick at none against Rondo's 5. Learn Facts Quick also leads on iOS requirement (14.0 vs 26.0). Rondo's advantage is update cadence (every 3 days vs every 4 months). On price, 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. Rondo sells 5 one-off in-app purchases. Learn Facts Quick asks for nothing beyond the download.

UpkeepUpdate frequency

Learn Facts Quick ships an update every 4 months, Rondo every 3 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 6 level
Learn Facts Quick versus Rondo: the parameters behind the verdict, then further details
ParameterLearn Facts QuickRondo
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS14.0 — better26.0
Further details — not scored
Size52 MB11 MB
Age rating4+4+
DeveloperKeith HarrymanKEN TOMINAGA

In-app purchases

None

Learn Facts Quick

No in-app purchases

5 purchases

Rondo

One-time5
  • Tip a prime · 199$1.99
  • Tip a prime · 499$4.99
  • Rondo Pro$4.99
Show 2 more
  • Tip a prime · 599$5.99
  • Tip a prime · 1999$19.99

Questions

Is Learn Facts Quick free?
Learn Facts Quick is free to download, with no in-app purchases.
Is Rondo free?
Rondo is free to download, with in-app purchases available.
Do Learn Facts Quick or Rondo have ads?
Neither Learn Facts Quick nor Rondo shows ads.
Which is updated more often, Learn Facts Quick or Rondo?
Learn Facts Quick ships an update every 4 months, and Rondo every 3 days. Most recently, Learn Facts Quick was updated on October 25, 2026 and Rondo on October 28, 2026.

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