Comparison

NumMemorize vs Pi Score Challenge

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

Head to head
About

NumMemorize

This app helps users memorize digits of mathematical constants like pi and e through quizzes. It also allows users to input and memorize their own custom numbers, and offers voice input for convenience.

Highlights
  • Memorize digits of pi, e, and other constants
  • Quiz yourself on number recall
  • Input and memorize custom numbers
  • Voice input for number entry
  • Practice for math and science students
Features
Read full description

NumMemorize quizzes you on the digits of well-known constants (such as π, e, √2), and will help you memorize additional digits. This app is a must-have for math and science students, and those wishing to impress teachers, friends and family, or fellow nerds! What party won't be livened up with a 20 digit recall of ϕ (the Golden ratio)? Imagine walking up to the blackboard and writing out √2 to 30, 40, or more digits! Say you're being hustled at a game of pool. Easy, bet your opponent, double or nothing, that you can recount pi to 30, no, even better, 50 digits. Let those other kids fill their heads with useless sports stats. These numbers are timeless and universal! Who knows who you'll impress - armed with this knowledge, you'll probably marry a smarter and better looking spouse, have a better job and live happily ever after! NEW! Now enter your own numbers! You can enter any numbers you'd like: drivers license, card numbers, phone numbers and your own favorite constants and values. Go ahead, enter 99! NEW! You can now just speak your number instead of tapping it in! NumMemorize makes it easy to memorize any number! (99! is 933262154439441526816992388562667004907159682643816214685929638952175999932299156089414639761565182862536979208272237582511852109168640000000000000000000000)

About

Pi Score Challenge

Features
Read full description

Unlock the Secrets of Pi! Get ready to challenge your mind with the ultimate Pi app. Pi Score Challenge is designed to test your memory and enhance your knowledge of the infinite digits of Pi. Whether you're a math enthusiast or just curious, this app offers an engaging and interactive way to sharpen your skills. Dive into a variety of levels, from beginner to expert, and track your progress as you learn more each day. Start improving now—just in time for Pi Day! Challenge your family and friends, see who can memorize the most digits. Download today and transform your numerical memory into a Pi Score!

Screenshots

NumMemorize4 screens
Pi Score Challenge1 screens

Verdict

The call

The clearest difference is in-app purchases: NumMemorize at none against Pi Score Challenge's 1. NumMemorize also leads on iOS requirement (9.0 vs 13.0). Pi Score Challenge's advantage is update cadence (fortnightly 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. Pi Score Challenge sells 1 one-off in-app purchase. NumMemorize asks for nothing beyond the download.

UpkeepUpdate frequency

NumMemorize ships an update every 4 months, Pi Score Challenge fortnightly. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
NumMemorize versus Pi Score Challenge: the parameters behind the verdict, then further details
ParameterNumMemorizePi Score Challenge
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size3 MB39 MB
Age rating4+4+
DeveloperMahboud ZabetianLee Cooper

In-app purchases

None

NumMemorize

No in-app purchases

1 purchases

Pi Score Challenge

One-time1
  • Slice of Pie$5.00

Questions

Is NumMemorize free?
NumMemorize is free to download, with no in-app purchases.
Is Pi Score Challenge free?
Pi Score Challenge is free to download, with in-app purchases available.
Do NumMemorize or Pi Score Challenge have ads?
Neither NumMemorize nor Pi Score Challenge shows ads.
Which is updated more often, NumMemorize or Pi Score Challenge?
NumMemorize ships an update every 4 months, and Pi Score Challenge fortnightly. Most recently, NumMemorize was updated on October 14, 2026 and Pi Score Challenge on October 6, 2026.

Other comparisons